2013 Vol. 34 Issue 6
2013 Vol. 34, No. 6
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2013, 34(6): 1-7.
doi: 10.16779/j.cnki.1003-5508.2013.06.001
Abstract:
E. pleiospermum,an endangered tree species endemic in East Asia,is mainly scattered in the riparian zone in Xiaozhaizigou Nature Reserve. In order to discover the causes of its concentrated distribution and maintaining mechanism in this area,by adopting the method of quadrat method,from the size of the population structure,static life table,survival curve,and space distribution pattern data,studies were made of its quantitative characteristic and spatial distribution pattern. The results showed that:1) both its individual number in the young-age period was few,relatively many in the mid-age period,and also very rare in the old age period. This spindle-like structure displayed that the size of its population belonged to the recession type; 2) Existing grade Ⅰ and Ⅱ had very few individual number,thus the individual mortatity in the static life table of the level Ⅰ and Ⅱ was negative,the individual mortality peak appeared in the grade Ⅳ,and reached the highest level in the grade Ⅶ; 3) Although the seedling survival rate was low,but its sapling survival rate was higher,therefore the survival curve was close to Deevey type Ⅰ. This indicated that E. pleiospermun easily survived in this area; 4) The spatial distribution pattern of its population was an aggregation distribution and its trend was consistent with the most rare plant species. Some population protection measures were recommended,such as moderately disturbing community,appropriately enlarging the gap size. These measures would promote its seed germination,normal development of its seedlings and saplings,and the individual's natural diffusion as well.
E. pleiospermum,an endangered tree species endemic in East Asia,is mainly scattered in the riparian zone in Xiaozhaizigou Nature Reserve. In order to discover the causes of its concentrated distribution and maintaining mechanism in this area,by adopting the method of quadrat method,from the size of the population structure,static life table,survival curve,and space distribution pattern data,studies were made of its quantitative characteristic and spatial distribution pattern. The results showed that:1) both its individual number in the young-age period was few,relatively many in the mid-age period,and also very rare in the old age period. This spindle-like structure displayed that the size of its population belonged to the recession type; 2) Existing grade Ⅰ and Ⅱ had very few individual number,thus the individual mortatity in the static life table of the level Ⅰ and Ⅱ was negative,the individual mortality peak appeared in the grade Ⅳ,and reached the highest level in the grade Ⅶ; 3) Although the seedling survival rate was low,but its sapling survival rate was higher,therefore the survival curve was close to Deevey type Ⅰ. This indicated that E. pleiospermun easily survived in this area; 4) The spatial distribution pattern of its population was an aggregation distribution and its trend was consistent with the most rare plant species. Some population protection measures were recommended,such as moderately disturbing community,appropriately enlarging the gap size. These measures would promote its seed germination,normal development of its seedlings and saplings,and the individual's natural diffusion as well.
2013, 34(6): 8-12.
doi: 10.16779/j.cnki.1003-5508.2013.06.002
Abstract:
In this paper,taking the rhizosphere soil of healthy hybrid bamboo as the object and based on 25 strains Bacillus spp. obtained by dilution-plate method,the fermentation activities of the two strains of biocontrol bacteria against Rosellinia necatrix were determined by the oxford cup method and the perforating method. B2 was the optimal strain and the pot experiment showed that it had great biocontrol potential,which was identified as Bacillus cereus by morphology and physiology-biochemistry. The field tests showed that 100~200 times (volume ratio) of dilution of the bacterial inocula was used to irrigate the surface roots with 100 mL per plant and applied once in spring each year,which could prevent the occurrence of white root rot. 50~100 times (volume ratio) of dilution of the bacterial inocula was used to irrigate the surface roots and surrounding soil with 200 mL per plant and applied twice in spring and summer each year and lasted for use of three years,which could control white root rot,and the effect was better than thiophanate methyl.
In this paper,taking the rhizosphere soil of healthy hybrid bamboo as the object and based on 25 strains Bacillus spp. obtained by dilution-plate method,the fermentation activities of the two strains of biocontrol bacteria against Rosellinia necatrix were determined by the oxford cup method and the perforating method. B2 was the optimal strain and the pot experiment showed that it had great biocontrol potential,which was identified as Bacillus cereus by morphology and physiology-biochemistry. The field tests showed that 100~200 times (volume ratio) of dilution of the bacterial inocula was used to irrigate the surface roots with 100 mL per plant and applied once in spring each year,which could prevent the occurrence of white root rot. 50~100 times (volume ratio) of dilution of the bacterial inocula was used to irrigate the surface roots and surrounding soil with 200 mL per plant and applied twice in spring and summer each year and lasted for use of three years,which could control white root rot,and the effect was better than thiophanate methyl.
2013, 34(6): 13-15.
doi: 10.16779/j.cnki.1003-5508.2013.06.004
Abstract:
This paper reported a new species of Yushania Keng f. from Southeast Guizhou. Yushnia leigongshanensis Yi et C. H. Yang is similar to Y. glandulosa Hsueh et Yi,but diverging from by its straight culm,leaves (2) 3~5 in every branchlet,laminas up to 12 cm long and 1.9 cm bord,second viens (3) 5~6 on each side,near entire or up serrulate. Cephalostachyum virulentum Y. M. Yang et Fan Du is not name of the C. fuchsianum Gamble.
This paper reported a new species of Yushania Keng f. from Southeast Guizhou. Yushnia leigongshanensis Yi et C. H. Yang is similar to Y. glandulosa Hsueh et Yi,but diverging from by its straight culm,leaves (2) 3~5 in every branchlet,laminas up to 12 cm long and 1.9 cm bord,second viens (3) 5~6 on each side,near entire or up serrulate. Cephalostachyum virulentum Y. M. Yang et Fan Du is not name of the C. fuchsianum Gamble.
2013, 34(6): 16-21.
doi: 10.16779/j.cnki.1003-5508.2013.06.005
Abstract:
By using pot experiments,researches was conducted on the effects of leaf litter of Populous on the growth and resistance physiology of Lactuca sativa during the decomposition process of leaf litter. Each pot contained 8 kg soil mixed with 30,60,90 and 0 g leaf litter. Height,biomass,and several resistance physiology indexes of Lactuca sativa were determined on 50 d after sowing. The results showed that 1) the heigh of A3 was inhibited significantly on 50 d after planting,and the biomass of A2 and A3 was inhibited significantly; 2) The activities of superoxide dismutase (SOD) increased in low litter content and decreased in higher litter content; 3) The content of malondialdehyde (MDA) of A2 and A3 was higher than that of control(CK),and moreover,it increased along with the addition of leaves; 4) The content of soluble sugar(SS) in each treatment was significantly higher than that of control(CK),whereas the content of soluble protein (SP) was significantly lower than that of control(CK). On the whole,the high content leaf litter of Populous had a serious allelopathic effect on Lactuca sativa during its initial decomposition process in soil.
By using pot experiments,researches was conducted on the effects of leaf litter of Populous on the growth and resistance physiology of Lactuca sativa during the decomposition process of leaf litter. Each pot contained 8 kg soil mixed with 30,60,90 and 0 g leaf litter. Height,biomass,and several resistance physiology indexes of Lactuca sativa were determined on 50 d after sowing. The results showed that 1) the heigh of A3 was inhibited significantly on 50 d after planting,and the biomass of A2 and A3 was inhibited significantly; 2) The activities of superoxide dismutase (SOD) increased in low litter content and decreased in higher litter content; 3) The content of malondialdehyde (MDA) of A2 and A3 was higher than that of control(CK),and moreover,it increased along with the addition of leaves; 4) The content of soluble sugar(SS) in each treatment was significantly higher than that of control(CK),whereas the content of soluble protein (SP) was significantly lower than that of control(CK). On the whole,the high content leaf litter of Populous had a serious allelopathic effect on Lactuca sativa during its initial decomposition process in soil.
2013, 34(6): 22-26.
doi: 10.16779/j.cnki.1003-5508.2013.06.006
Abstract:
The eastern margin of the Qing-hai-Tibetan Plateau boasts plenty of wetlands,and also is the source area of major rivers in China. And therefore the changes of the wetlands in this region will largely influence the inland ecological environment. The study sites were selected in the eastern Tibetan Plateau and they were:Rouergai wetland,Jiuzhaigou Nature Reserve wetland and Hongkou Nature Reserve wetland. Investigations were made on the aboveground biomass of wetland plant communities in the study sites and the results indicated that there was a significant correlation (p < 0.01) between the study sites; and the underground biomass in Ruoergai wetland had a significant correlation (p < 0.05) among other sites. The biomass at higher altitudes was larger than that at lower altitudes. There was a significant higher above-ground biomass (F=9.05,P < 0.01) in Ganhaizi wetland than that in Jiuzhaigou wetland,and their distance was close; while there was no significant correlation in underground biomass among three sites. In terms of carbon sequestration,the order was Ganhaizi Wetland > Ruoergai Wetland > Jiuzhaigou Wetland > Hongkou wetland. The main factor impacting the biamass change should be the types of wetlands and then followed by human activities.
The eastern margin of the Qing-hai-Tibetan Plateau boasts plenty of wetlands,and also is the source area of major rivers in China. And therefore the changes of the wetlands in this region will largely influence the inland ecological environment. The study sites were selected in the eastern Tibetan Plateau and they were:Rouergai wetland,Jiuzhaigou Nature Reserve wetland and Hongkou Nature Reserve wetland. Investigations were made on the aboveground biomass of wetland plant communities in the study sites and the results indicated that there was a significant correlation (p < 0.01) between the study sites; and the underground biomass in Ruoergai wetland had a significant correlation (p < 0.05) among other sites. The biomass at higher altitudes was larger than that at lower altitudes. There was a significant higher above-ground biomass (F=9.05,P < 0.01) in Ganhaizi wetland than that in Jiuzhaigou wetland,and their distance was close; while there was no significant correlation in underground biomass among three sites. In terms of carbon sequestration,the order was Ganhaizi Wetland > Ruoergai Wetland > Jiuzhaigou Wetland > Hongkou wetland. The main factor impacting the biamass change should be the types of wetlands and then followed by human activities.
2013, 34(6): 27-32.
doi: 10.16779/j.cnki.1003-5508.2013.06.007
Abstract:
In this paper,a summary description is given of the research process of vegetation restoration in dry valleys of Sichuan provence in the past 60 years. A lot of achievements and experience are also summarized and several questions are drawn out. On the basis, the main directions and key points are put forward for the future studies.
In this paper,a summary description is given of the research process of vegetation restoration in dry valleys of Sichuan provence in the past 60 years. A lot of achievements and experience are also summarized and several questions are drawn out. On the basis, the main directions and key points are put forward for the future studies.
2013, 34(6): 33-38.
doi: 10.16779/j.cnki.1003-5508.2013.06.008
Abstract:
In this paper,analysis was made of the differences between the present distribution areas of the giant pandas (Ailuropoda melanoleuca) with the Emei Mountain (where pandas were once found after 1980s) and Shennongjia Nature Reserve (where pandas had disappeared many years ago) according to the natural geographical environments,staple food bamboos' distribution patterns and the plant genus flora characteristics of vegetation. The results showed that the Emei Mountain belonged to the giant pandas distribution ranges,but the longitude of Shennongjia was out of the present giant pandas' distribution. There were no obvious differences among environmental factors,bamboo distribution patterns and the plant genus flora characteristics. The vertical distribution characters of forest vegetation were very similar. Historically, the social economics developed persistently and anthropogenic impacts increased unceasingly so that giant pandas disappeared afterwards in the Emei Mountain and Shennongjia Nature Reserve.
In this paper,analysis was made of the differences between the present distribution areas of the giant pandas (Ailuropoda melanoleuca) with the Emei Mountain (where pandas were once found after 1980s) and Shennongjia Nature Reserve (where pandas had disappeared many years ago) according to the natural geographical environments,staple food bamboos' distribution patterns and the plant genus flora characteristics of vegetation. The results showed that the Emei Mountain belonged to the giant pandas distribution ranges,but the longitude of Shennongjia was out of the present giant pandas' distribution. There were no obvious differences among environmental factors,bamboo distribution patterns and the plant genus flora characteristics. The vertical distribution characters of forest vegetation were very similar. Historically, the social economics developed persistently and anthropogenic impacts increased unceasingly so that giant pandas disappeared afterwards in the Emei Mountain and Shennongjia Nature Reserve.
2013, 34(6): 39-43.
doi: 10.16779/j.cnki.1003-5508.2013.06.009
Abstract:
In May,August and September of 2006,the investigation was made on the basic resources in Kasha Lake Nature Reserve,Sichuan province. A summary of these collections showed that there were 54 species mammals found in Kasha Lake Nature Reserve. among them, 24 species belonged to the Oriental realm,28 species belonged to the Palearctic realm and 2 species were widely distributed. Of all the total species in this area 20 species have been identified as national protected rare mammals,and 5 specices of which are the first grade protected rare mammals. In this reserve,there were 25 species endemic to China. Apodemus agrarius was found in this area and it was the striped field mouse found at the highest altitude up to now.
In May,August and September of 2006,the investigation was made on the basic resources in Kasha Lake Nature Reserve,Sichuan province. A summary of these collections showed that there were 54 species mammals found in Kasha Lake Nature Reserve. among them, 24 species belonged to the Oriental realm,28 species belonged to the Palearctic realm and 2 species were widely distributed. Of all the total species in this area 20 species have been identified as national protected rare mammals,and 5 specices of which are the first grade protected rare mammals. In this reserve,there were 25 species endemic to China. Apodemus agrarius was found in this area and it was the striped field mouse found at the highest altitude up to now.
2013, 34(6): 44-47.
doi: 10.16779/j.cnki.1003-5508.2013.06.010
Abstract:
CO2,the exhaust gas from industry and fossil combustion,is gradually intensifying the greenhouse effect. However,forests absorb and fix a great quantity of CO2 in the air,and become a huge carbon sink. In order to slow down the intensifying global climate change,forestry is just experiencing the adjustment and changes of its development direction,and the carbon forestry,which includes four aspects:carbon sequestration forestation,forest carbon sink protection,low-carbon economy development and carbon alternatives,is quietly emerging. With the objective of claiming "ecological homestead" and developing green GDP,investigating the local carbon sequestration ability and calculating the carbon value play a very important role in developing the low-carbon economy and protecting the carbon sink. This article takes Cangxi county in Sichuan province as an example to calculate and research the forest carbon storage,carbon sequestration ability,carbon sequestration potential and carbon sequestration value,and provides scientific basis for the future green GDP measurement,low-carbon economy development and carbon sink financing.
CO2,the exhaust gas from industry and fossil combustion,is gradually intensifying the greenhouse effect. However,forests absorb and fix a great quantity of CO2 in the air,and become a huge carbon sink. In order to slow down the intensifying global climate change,forestry is just experiencing the adjustment and changes of its development direction,and the carbon forestry,which includes four aspects:carbon sequestration forestation,forest carbon sink protection,low-carbon economy development and carbon alternatives,is quietly emerging. With the objective of claiming "ecological homestead" and developing green GDP,investigating the local carbon sequestration ability and calculating the carbon value play a very important role in developing the low-carbon economy and protecting the carbon sink. This article takes Cangxi county in Sichuan province as an example to calculate and research the forest carbon storage,carbon sequestration ability,carbon sequestration potential and carbon sequestration value,and provides scientific basis for the future green GDP measurement,low-carbon economy development and carbon sink financing.
2013, 34(6): 48-51.
doi: 10.16779/j.cnki.1003-5508.2013.06.011
Abstract:
Carbon reserve of artificial forest ecosystem is one of the major carbon stocks of terrestrial ecological system. Negative environmental effects caused by clear-cutting and slash burning deserve careful thought. In this paper,28-years-old Chinese fir plantation in the rainy area of Southwest China was taken as the research objective,and the main aim was to clarify the effects of clear-cutting and slash burning on carbon stock of Chinese fir plantation. The results showed that (1) C transfer amount of wood caused by logging was 85.9 (±7.6) t·hm-2,(2) C loss of logging residues,understorey and litter caused by slash burning were 8.8 (±0.3) t·hm-2,0.19 (±0.02) t·hm-2 and 2.80 (±0.08) t·hm-2,respectively. (3) Slash burning could significantly decrease the content of soil organic carbon in 0~60 cm layer,the C loss was 39.5 (±1) t·hm-2. The total release of CO2 caused by burning of the understorey plants,litter and soil organic matter,was 188.1 t·hm-2. In the global climate change,negative environmental effects caused by clear-cutting and slash burning of plantation nust not be ignored.
Carbon reserve of artificial forest ecosystem is one of the major carbon stocks of terrestrial ecological system. Negative environmental effects caused by clear-cutting and slash burning deserve careful thought. In this paper,28-years-old Chinese fir plantation in the rainy area of Southwest China was taken as the research objective,and the main aim was to clarify the effects of clear-cutting and slash burning on carbon stock of Chinese fir plantation. The results showed that (1) C transfer amount of wood caused by logging was 85.9 (±7.6) t·hm-2,(2) C loss of logging residues,understorey and litter caused by slash burning were 8.8 (±0.3) t·hm-2,0.19 (±0.02) t·hm-2 and 2.80 (±0.08) t·hm-2,respectively. (3) Slash burning could significantly decrease the content of soil organic carbon in 0~60 cm layer,the C loss was 39.5 (±1) t·hm-2. The total release of CO2 caused by burning of the understorey plants,litter and soil organic matter,was 188.1 t·hm-2. In the global climate change,negative environmental effects caused by clear-cutting and slash burning of plantation nust not be ignored.
2013, 34(6): 52-55.
doi: 10.16779/j.cnki.1003-5508.2013.06.012
Abstract:
The micro habitat of a collapse mountain in the Wenchuan earthquake area were divided into gravel slope,rock slope,gravel land,lacuna earth and groove earth in this paper. Based on the type of division of micro habitats,the resilience of natural vegetation of micro-habitats was measured by use of plant diversity. The results showed that the index of plant diversity could reflect the differences in vegetation rehabilitation of micro habitats,and the index of resilience of natural vegetation was as follows:groove earth > lacuna earth > gravel land > rock slope > gravel slope. This responded objectively to the present vegetation natural restoration in different habitats,and measured results would provide reference for taking different measures to restore the vegetation of the disaster area.
The micro habitat of a collapse mountain in the Wenchuan earthquake area were divided into gravel slope,rock slope,gravel land,lacuna earth and groove earth in this paper. Based on the type of division of micro habitats,the resilience of natural vegetation of micro-habitats was measured by use of plant diversity. The results showed that the index of plant diversity could reflect the differences in vegetation rehabilitation of micro habitats,and the index of resilience of natural vegetation was as follows:groove earth > lacuna earth > gravel land > rock slope > gravel slope. This responded objectively to the present vegetation natural restoration in different habitats,and measured results would provide reference for taking different measures to restore the vegetation of the disaster area.
2013, 34(6): 56-59.
doi: 10.16779/j.cnki.1003-5508.2013.06.013
Abstract:
Investigations were made on insect pests damaging tree trunks of Zanthoxylum bungeanum plantation in Aba Zang-Qiang Autonomous Prefecture. The results indicated that the average proportion of Z. bungeanum damaged by insect pests was 85.2%,and current expectation of life of the trees was not more than 8 years in the prefecture. Dominated insect pests damaging tree trunks were Linda nigroscatata, Clytus validus,Stenhomalus taiwanus,Alcidodes sauteri. Linda nigroscatata and Alcidodes sauteri mainly damaged the trees in the region with lower elevation,and Clytus validus and Stenhomalus taiwanus damaged the trees in the region with higher elevation. Moreover,the preventive treatments for the insect pests were put forward in the paper.
Investigations were made on insect pests damaging tree trunks of Zanthoxylum bungeanum plantation in Aba Zang-Qiang Autonomous Prefecture. The results indicated that the average proportion of Z. bungeanum damaged by insect pests was 85.2%,and current expectation of life of the trees was not more than 8 years in the prefecture. Dominated insect pests damaging tree trunks were Linda nigroscatata, Clytus validus,Stenhomalus taiwanus,Alcidodes sauteri. Linda nigroscatata and Alcidodes sauteri mainly damaged the trees in the region with lower elevation,and Clytus validus and Stenhomalus taiwanus damaged the trees in the region with higher elevation. Moreover,the preventive treatments for the insect pests were put forward in the paper.
2013, 34(6): 60-62.
doi: 10.16779/j.cnki.1003-5508.2013.06.014
Abstract:
2013, 34(6): 63-64.
doi: 10.16779/j.cnki.1003-5508.2013.06.015
Abstract:
By the way of line survey and fixed sample survey,investigations were made of walnut diseases and insect pests in Sinan County. The results indicated that there were 12 plant diseases and insect pests found,including 2 diseases and 10 insect pests. In addition,a description was given of characteristics, harm and distribution and occurrence of 12 kinds of plant diseases and insect pests, and some prevention suggestions were also put forward for them.
By the way of line survey and fixed sample survey,investigations were made of walnut diseases and insect pests in Sinan County. The results indicated that there were 12 plant diseases and insect pests found,including 2 diseases and 10 insect pests. In addition,a description was given of characteristics, harm and distribution and occurrence of 12 kinds of plant diseases and insect pests, and some prevention suggestions were also put forward for them.
2013, 34(6): 65-68.
doi: 10.16779/j.cnki.1003-5508.2013.06.016
Abstract:
Taking annual Mesua ferrea and Erythrophleum fordii trees planted under 8 years old rubber forest as the observation object,four times of investigation were made on the tree height of two tree species in March,June,September and December. The results showed that the peak height growth of the two species appeared from June to September,and as for the largest amount of height growth,the average tree height growth of Mesua ferrea was 14.97 cm,and the average tree height growth of Erythrophleum fordii was 34.65 cm. In addition,the best cultivation model was found to be Mesua ferrea + Erythrophleum fordii + parashorea cathayensis.
Taking annual Mesua ferrea and Erythrophleum fordii trees planted under 8 years old rubber forest as the observation object,four times of investigation were made on the tree height of two tree species in March,June,September and December. The results showed that the peak height growth of the two species appeared from June to September,and as for the largest amount of height growth,the average tree height growth of Mesua ferrea was 14.97 cm,and the average tree height growth of Erythrophleum fordii was 34.65 cm. In addition,the best cultivation model was found to be Mesua ferrea + Erythrophleum fordii + parashorea cathayensis.
2013, 34(6): 69-71.
doi: 10.16779/j.cnki.1003-5508.2013.06.017
Abstract:
The trap lamp with the wavelengths of 300 nm,300 nm,380 nm,380 nm,460 nm,500 nm,540 nm and 580 nm and the power of 8 W was used to snare adults of Parocneria orienta Chao in the field. The trap results showed that the trap lamp with eight kinds of wavelengths exhibited different effects,and the trap lamp with the wavelength of 340 nm and the power of 8 W had the best trapping effect. The trap lamp with the wavelength of 340 nm and the power of 8 W had trapping effect on adults of Parocneria orienta Chao within 60 minutes and 180 metres,and yet the trap rate more than 87.1% was within distance of 120 metres.
The trap lamp with the wavelengths of 300 nm,300 nm,380 nm,380 nm,460 nm,500 nm,540 nm and 580 nm and the power of 8 W was used to snare adults of Parocneria orienta Chao in the field. The trap results showed that the trap lamp with eight kinds of wavelengths exhibited different effects,and the trap lamp with the wavelength of 340 nm and the power of 8 W had the best trapping effect. The trap lamp with the wavelength of 340 nm and the power of 8 W had trapping effect on adults of Parocneria orienta Chao within 60 minutes and 180 metres,and yet the trap rate more than 87.1% was within distance of 120 metres.
2013, 34(6): 72-76.
doi: 10.16779/j.cnki.1003-5508.2013.06.018
Abstract:
Twenty-one methods were used to treat the seeds of Cunninghamia lanceolata. The results indicated that the germination rate was the highest by the method of soaking seeds with 25℃ warm water for 1 hour,reaching 28.67%. The second high germination rate was 27.67% by soaking seeds with 40℃ warm water for 1 day. The lowest germination rate was 12.33% by soaking seeds with 100℃ boiling water for 5 minutes. On the whole,the method of soaking seeds with 40℃ warm water for 1 day was the best,for the seeds germinated fastest,and sprouted tidily,which was the best way of seed pretreatment of Cunninghamia lanceolata before sowing.
Twenty-one methods were used to treat the seeds of Cunninghamia lanceolata. The results indicated that the germination rate was the highest by the method of soaking seeds with 25℃ warm water for 1 hour,reaching 28.67%. The second high germination rate was 27.67% by soaking seeds with 40℃ warm water for 1 day. The lowest germination rate was 12.33% by soaking seeds with 100℃ boiling water for 5 minutes. On the whole,the method of soaking seeds with 40℃ warm water for 1 day was the best,for the seeds germinated fastest,and sprouted tidily,which was the best way of seed pretreatment of Cunninghamia lanceolata before sowing.
2013, 34(6): 77-79,55.
doi: 10.16779/j.cnki.1003-5508.2013.06.019
Abstract:
In this paper,analysis was made of the experiment of introduction of three fig varieties (Brunswick,Masui Dauphine,and A212) in Weiyuan. The result showed that the above-mentioned figs could adapt to the climate and soil in Weiyuan County. The fruiting rate of introduced fig varieties reached 100% in the first year, which were planted in 2003, because the new growth branches caused the maximum change in the second year. Compared with the local fig,the introduced fig varieties were better than the local fig in taste,mean fruit length,mean fruit diameter and mean fruit weight. The Brunswick's mean production per hectare was the largest in three introduced fig varieties,whose production was 31 500 kg per hectare. At the same site conditions,the introduced fig varieties were obviously better than the local varieties in tree growth level,mean individual production,and mean hectare production. Therefore,the introduced Brunswick,Masui Dauphine,and A212 fig varieties could be cultivated in Weiyuan areas.
In this paper,analysis was made of the experiment of introduction of three fig varieties (Brunswick,Masui Dauphine,and A212) in Weiyuan. The result showed that the above-mentioned figs could adapt to the climate and soil in Weiyuan County. The fruiting rate of introduced fig varieties reached 100% in the first year, which were planted in 2003, because the new growth branches caused the maximum change in the second year. Compared with the local fig,the introduced fig varieties were better than the local fig in taste,mean fruit length,mean fruit diameter and mean fruit weight. The Brunswick's mean production per hectare was the largest in three introduced fig varieties,whose production was 31 500 kg per hectare. At the same site conditions,the introduced fig varieties were obviously better than the local varieties in tree growth level,mean individual production,and mean hectare production. Therefore,the introduced Brunswick,Masui Dauphine,and A212 fig varieties could be cultivated in Weiyuan areas.
2013, 34(6): 80-81,62.
doi: 10.16779/j.cnki.1003-5508.2013.06.020
Abstract:
2013, 34(6): 82-83.
doi: 10.16779/j.cnki.1003-5508.2013.06.021
Abstract:
In present paper,studies were made of the effect of different types of nutrition bags on seedling raising of Pinus radiata for three consecutive years,the results showed that in the use of the nutrition bag of 10 cm×15 cm. The seedlings had an average height of 23.2 cm and the average ground dimeter of 0.3 cm,reaching the standard of the first grade seedlings.
In present paper,studies were made of the effect of different types of nutrition bags on seedling raising of Pinus radiata for three consecutive years,the results showed that in the use of the nutrition bag of 10 cm×15 cm. The seedlings had an average height of 23.2 cm and the average ground dimeter of 0.3 cm,reaching the standard of the first grade seedlings.
2013, 34(6): 84-88,76.
doi: 10.16779/j.cnki.1003-5508.2013.06.022
Abstract:
7 varieties of Olea europaea was introduced for cultivation tests in Jintang Country in 2009. Throngh setting their standard plots,observations was made of their phenophase,their phenotypic characters was compared and analys was made of their oil content and oily components. The result showed that all the varieties bloomed in late April and their fruits ripened in early October,while one species called Abeijina would ripen a little later(in middle October); There was almost significant correlation between any two among them in the phenotypic character。According to the order from high to low,their oil content showed as Ezhi 8th > Foao > Abeijina > Pixueli > Piguaer > Xiaopingguo > Laixing; The weight of single fruit showed as Pixueli > Laixing > Ezhi 8th > Xiaopingguo > Foao > Piguaer > Abeijina; The proportion of flesh in single fruit showed as Xiaopingguo,Pixueli > Laixing > Ezhi 8th > Piguaer > Abeijina > Foao; Abajina showed better adaptability among the 7 varieties,and then Foao and Ezhi 8th came next.
7 varieties of Olea europaea was introduced for cultivation tests in Jintang Country in 2009. Throngh setting their standard plots,observations was made of their phenophase,their phenotypic characters was compared and analys was made of their oil content and oily components. The result showed that all the varieties bloomed in late April and their fruits ripened in early October,while one species called Abeijina would ripen a little later(in middle October); There was almost significant correlation between any two among them in the phenotypic character。According to the order from high to low,their oil content showed as Ezhi 8th > Foao > Abeijina > Pixueli > Piguaer > Xiaopingguo > Laixing; The weight of single fruit showed as Pixueli > Laixing > Ezhi 8th > Xiaopingguo > Foao > Piguaer > Abeijina; The proportion of flesh in single fruit showed as Xiaopingguo,Pixueli > Laixing > Ezhi 8th > Piguaer > Abeijina > Foao; Abajina showed better adaptability among the 7 varieties,and then Foao and Ezhi 8th came next.
2013, 34(6): 89-92.
doi: 10.16779/j.cnki.1003-5508.2013.06.023
Abstract:
The alpine grassland in northwest of Sichuan is an important ecological barrier to the upper reaches of the Yangtze River and the Yellow River and plays an irreplaceable role in conserving water and soil,nursing biodiversity,and regulating regional climate. The serious degradation of the alpine grassland in this region is now endangering the sustainable utilization of grassland resources and the plateau ecological environment security. This paper deals with the formation reason of the alpine degraded grassland by use of the research achievements both at home and abroad. It is found that the fragile ecological environment is the intrinsic factor,which has caused the alpine grassland to degrade in northwest of Sichuan. Moreover,the unreasonable utilization and disturbance (e. g., reclamation of grassland, tourism development,and overgrazing) are the major driving force for the grassland degradation. Additionally,the global warming,grassland rodents and insects and grassland mismanagement accelerate the degradation of the alpine grassland. Therefore,it is very important to restore the alpine degraded grassland on the basis of these formation reasons. Moreover,using scientific methods (e. g.,the development of livestock production according to carrying capacity,increase of marketing rate of livestock,and establishment of artificial fence) will benefit the restoration of alpine grassland.
The alpine grassland in northwest of Sichuan is an important ecological barrier to the upper reaches of the Yangtze River and the Yellow River and plays an irreplaceable role in conserving water and soil,nursing biodiversity,and regulating regional climate. The serious degradation of the alpine grassland in this region is now endangering the sustainable utilization of grassland resources and the plateau ecological environment security. This paper deals with the formation reason of the alpine degraded grassland by use of the research achievements both at home and abroad. It is found that the fragile ecological environment is the intrinsic factor,which has caused the alpine grassland to degrade in northwest of Sichuan. Moreover,the unreasonable utilization and disturbance (e. g., reclamation of grassland, tourism development,and overgrazing) are the major driving force for the grassland degradation. Additionally,the global warming,grassland rodents and insects and grassland mismanagement accelerate the degradation of the alpine grassland. Therefore,it is very important to restore the alpine degraded grassland on the basis of these formation reasons. Moreover,using scientific methods (e. g.,the development of livestock production according to carrying capacity,increase of marketing rate of livestock,and establishment of artificial fence) will benefit the restoration of alpine grassland.
2013, 34(6): 93-95.
doi: 10.16779/j.cnki.1003-5508.2013.06.024
Abstract:
Soil salinization has been a severe problem which restricts the production of agro-forestry and the ecological environment improvement. Hence,studying the plant resistance to salt-alkali stress has an important significance upon how to develop and utilize salinized soil and how to produce new varieties which can resist salt-alkali stress. In this article,a summary description is given of plant responses to salt-alkali stress in morphology,physiology and biochemistry,aiming to reveal the mechanism of plant resistance to the stress.
Soil salinization has been a severe problem which restricts the production of agro-forestry and the ecological environment improvement. Hence,studying the plant resistance to salt-alkali stress has an important significance upon how to develop and utilize salinized soil and how to produce new varieties which can resist salt-alkali stress. In this article,a summary description is given of plant responses to salt-alkali stress in morphology,physiology and biochemistry,aiming to reveal the mechanism of plant resistance to the stress.
2013, 34(6): 96-98,59.
doi: 10.16779/j.cnki.1003-5508.2013.06.025
Abstract:
In this paper,an elaboration is made of the development status of Camellia oleifera industry in Sichuan province,and analysis is made of existing problems of Camellia oleifera. Some suggestions are proposed from the aspects of increasing investment in science and technology,rational planning,strengthening the demonstration forest establishment, renovating of existing non-productive orchards, supporting leading enterprises,and comprehensive utilization etc,aiming to provide reference for the healthy development of Camellia oleifera industry in Sichuan province.
In this paper,an elaboration is made of the development status of Camellia oleifera industry in Sichuan province,and analysis is made of existing problems of Camellia oleifera. Some suggestions are proposed from the aspects of increasing investment in science and technology,rational planning,strengthening the demonstration forest establishment, renovating of existing non-productive orchards, supporting leading enterprises,and comprehensive utilization etc,aiming to provide reference for the healthy development of Camellia oleifera industry in Sichuan province.
2013, 34(6): 99-103.
doi: 10.16779/j.cnki.1003-5508.2013.06.026
Abstract:
In recent years,the risk of pests brought by the imported blueberry has increased with the development of blueberry industry. Based on extensive collection of data, the risk analysis of pests on the imported blueberry seedlings was initiated according to the international standards for phytosanitary measures. Eight pests were defined as the quarantine pests, and the risk management measures of pests were suggested in order to minimize possible invasion of the quarantine pests.
In recent years,the risk of pests brought by the imported blueberry has increased with the development of blueberry industry. Based on extensive collection of data, the risk analysis of pests on the imported blueberry seedlings was initiated according to the international standards for phytosanitary measures. Eight pests were defined as the quarantine pests, and the risk management measures of pests were suggested in order to minimize possible invasion of the quarantine pests.
2013, 34(6): 104-105.
doi: 10.16779/j.cnki.1003-5508.2013.06.027
Abstract:
2013, 34(6): 106-108.
doi: 10.16779/j.cnki.1003-5508.2013.06.028
Abstract:
2013, 34(6): 109-111.
doi: 10.16779/j.cnki.1003-5508.2013.06.029
Abstract:
In this article,analysis is made of the current status and application condition of bamboo resources in Qiannan area and some recommendations are given on how to promote and develop bamboo industry,aiming to protect the forest resources,enhance the forest economy and increase the income of farmers.
In this article,analysis is made of the current status and application condition of bamboo resources in Qiannan area and some recommendations are given on how to promote and develop bamboo industry,aiming to protect the forest resources,enhance the forest economy and increase the income of farmers.
2013, 34(6): 112-114.
doi: 10.16779/j.cnki.1003-5508.2013.06.030
Abstract:
