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2018 Vol. 39 Issue 3

2018 Vol. 39, No. 3

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Analysis of Growth and Leaf Characteristics of Different Provenances of Cyclocarya paliurus Saplings
WANG Hai-feng, YAN Xian-chun, LUO Jian-xun, LIU Fu-rong, WANG Si-lu
2018, 39(3): 1-6. doi: 10.16779/j.cnki.1003-5508.2018.03.001
Abstract:
For early selection of the excellent provenances of Cyclocarya paliurus,analysis was made of the growth characteristics and leaf traits of five saplings,which were from Muchuan of Sichuan,Liping of Guizhou,Dong'an of Hunan,Wufeng of Hubei and Xiushui of Jiangxi.The results showed that there were significant differences in growth characteristics among different provenances of C. paliurus saplings.And there were significant differences in leaflet length,width and area,with the exception of leaf thickness,compound leaf petiole diameter and compound leaf petiole length.The correlation analysis and principal component analysis method were applied to evaluate the growth characteristics and leaf traits of C. paliurus saplings. The results showed that there was an extremely significant positive correlation among the height of tree,the ground diameter and number of sub-branch,the length and diameter of the longest lateral branch;There was an extremely significant positive correlation among the number of sub-branch and leaflet area,length and width;The leaflet length and width,and area were respectively correlated positively with the compound leaf petiole diameter and compound leaf petiole length. The cumulative variance proportion of the first two principal components was 97.18%.According to comprehensive evaluation,the higher comprehensive scores of C. paliurus saplings among different provenances were from Muchuan of Sichuan and Liping of Guizhou.
A Study of Spatial Utilization and Habitat Selection of Giant Pandas in Caopo Nature Reserve
RAO Jia, BAI Wen-ke, ZHANG Jin-dong, DONG Xin, GU Xiao-dong, CAI Qing-gui, ZHOU Cai-quan
2018, 39(3): 7-12,34. doi: 10.16779/j.cnki.1003-5508.2018.03.002
Abstract:
The spatial distribution pattern and habitat selection dynamic characteristics of giant pandas were important to understand their population dynamics and living environment, which also provided primary reference for the conservation. Based on data from the 3rd and 4th national giant panda surveys, as well as field survey data of 2016, the spatial distribution dynamics and habitat selection dynamic characteristics were studied for the giant panda population in Caopo Nature Reserve. The results showed that along with an increase of the giant panda population, the spatial utilization area of giant pandas increased by 45.62%. With the pressure of an increasing population size, the giant panda spatial utilization pattern underwent a significant diffusion. In terms of habitat selection, among the seven microhabitat factors selected, the slope and altitude selection of giant pandas tended to be balanced, higher altitude, and larger slope. There was no obvious change in the selection of slope type, vegetation type, forest origin and bamboo type. Under the condition of limited space and food resources, the habitat pressure caused by the rapid increase of population resulted in significant changes in the spatial utilization pattern of giant pandas. The results showed that the wild giant panda population had a high capacity for environmental adaptation, migration and diffusion. Hence, by studying the changes in spatial utilization and habitat selection characteristics of the giant panda population in the reserve over a long temporal scale, It would be possible to understand the population dynamics of the giant panda population and the demand for different habitat factors. The methods and results of this study had significance for the continued conservation of wild giant panda populations.
Comparison of Forest Change Detection Methods
XIE Xin-xian, YUE Cai-rong, HUO Peng
2018, 39(3): 13-19. doi: 10.16779/j.cnki.1003-5508.2018.03.003
Abstract:
In recent decades, multi-temporal remote sensing image processing and change detection had been a relatively active research direction in the field of remote sensing. Forests belonged to the largest ecosystems on land and their changes had important implications for the global ecological environment, biodiversity and climate change. Obtaining timely and accurate information on forest dynamic changes would be of great significance for estimating carbon resources and achieving sustainable management of forest resources. In this paper, through a large number of related literature at home and abroad, the forest change detection technology had been systematically compared and summarized, and it was summarized into six major categories. A detailed discussion was made on the basic principles and characteristics of various methods and their application scope,advantages and disadvantages,aiming to provide a certain reference method for forest management.
Physiological Response of Photinia fraseri to Water Stress
ZHU Han-ming-yue, HONG Xia, ZHU Tian-hui
2018, 39(3): 20-23,39. doi: 10.16779/j.cnki.1003-5508.2018.03.004
Abstract:
The annual seedlings of Photinia fraseri were treated with four treatments including normal water supply (75%~80% of soil maximum moisture capacity), mild stress (55%~60%), moderate stress(40%~45%) and severe stress(30%~35%). Through pot experiment, studies were made of the effects of water stress on membrane permeability, MDA content, net photosynthetic rate, transpiration rate, root growth characteristics and activity. The results showed that the degree and time of water stress had certain relativity with membrane permeability. Among control, mild stress and moderate stress, the difference was not significant. Along with the aggravation of stress degree, MDA content would rise and reach the peak in 20th day, then maintain a stable state. Water stress and photosynthetic rate had positive correlation, and the net photosynthetic rate maintained a high level in a long period. But the transpiration rate presented unimodal curve with rising and then descending, the change of severe stress treatment was not significant, and the downtrend was not obvious. Water stress could inhibit the main root growth with the branch root growing, the order of growth quantities was severe stress > moderate stress > mild stress> the control. The intensification of water stress could reduce the number of branch root, but the degree of water stress was negatively related to root absorption area and root activity. The treatment of severe stress had a significant difference with the others, the treatments of moderate stress and mild stress had not significant difference with the control. The analyses above indicated that Photinia fraseri had strong tolerance to water stress.
Features and Influence Fectors of the Sugar Maple Sap Flow in the Non-growing Seasons
LI Ming-dan, WANG A-qing, TANG Zu-xiang, WU Run-sheng, ZHOU Jing-han, WANG Wei, LIU Hua
2018, 39(3): 24-28,43. doi: 10.16779/j.cnki.1003-5508.2018.03.005
Abstract:
In order to understand the dynamics variation characteristics of Acer saccharum sap flow of during 4 years, the sap flow rate was measured from September 2016 to March 2017 by the Sap Flow Set EMS 62, and environmental factors were recorded by the automatic meteorological station. The results showed that (1) diurnal changes of A. saccharum sap flow were of multiple peak types in different months, the high peak happened in daytime and low peak in nighttime. There were obvious characteristics of night sap flow and the durations of zero-rate sap flows varied. (2) The sap flow rate decreased generally from September 2016 to March 2017. (3) In September, the diurnal changes of the sap flow of A. saccharum displayed a single peak type. The order of the sap flow rate in different weather conditions were as follows:sunny > cloudy > rainy day. (4) The sap flow rate of main trunks were higher than that of branches in all weather conditions. But the peak value varied. (5) During the non-growing season, there was a significantly positive correlation between sap flow and light radiation or air temperature, and a significantly negatively correlated with the air humidity or soil moisture.
Effects of Thinning on Biodiversity of Undergrowth in Mid-young Picea asperata Plantations
LI Deng-feng, FENG Qiu-hong, YAN Jin-yan, XIE Da-jun, LIU Xing-liang, SUN Zhi-yu
2018, 39(3): 29-34. doi: 10.16779/j.cnki.1003-5508.2018.03.006
Abstract:
In order to study the effect of different thinning intensity on biodiversity of undergrowth in Picea asperata plantations, the representative samplings(20a, 30a, 40a) were chosen for different thinning modes including un-thinning (as the CK), mild thinning and moderate thinning in Miyaluo area, the sub-alpine region of western Sichuan. One year after thinning, the biodiversity indexes of shrub layer and grass layer were measured and analyzed under P. asperata Mast. Plantations. The result showed that 1) the biodiversity of undergrowth in 20-year-old P. asperata. plantations was not significantly affected by thinning. 2) The moderate thinning reduced significantly Shannon-Weiner index of grass layer in 30-year and 40-year old plantations. 3)The mild thinning increased significantly Shannon-Weiner index and Simpson index of shrub layer of 40-year-old plantations. As a result, thinning had a kind of influence on biodiversity of undergrowth in plantations of 30-year-old and 40-year-old in a short period of time.
Effects of Thinning Betula spp. on Natural Regeneration of Abies faxoniana under Mixed Forest of A. faxoniana and B. spp. in Sub-alpine Region of Western Sichuan
FENG Qiu-hong, PU Yuan-feng, LI Deng-feng, CHEN Su-fen, LIU Xing-liang, CHEN Yan, KANG Yong-hong, CHEN Jin
2018, 39(3): 35-39. doi: 10.16779/j.cnki.1003-5508.2018.03.007
Abstract:
The number and structure of regenerations of Abies faxoniana under mixed A. faxoniana and Betula spp. forest were measured and analyzed through representative sampling and field measurement method. Effects of thinning birch (CK, S1 and S2 respectively means thinning birch off 0%, 25% and 50% of the total volume of birch in forest) were analyzed on natural regeneration of A. faxoniana under A. faxoniana and Betula spp. forest. The result showed that thinning birch increased tree DBH (diameter at breast height) area and basal diameter of A. faxoniana seedlings significantly; Survival rate and height of A. faxoniana seedlings were improved by S2. After thinning birch, the structure of diameter class of A. faxoniana seedlings had little change, but the proportion of trail grade seedlings had a trend of increasing.
Technology of Intersectional Crossing between Populus deltoides and P. davidiana
PENG Ru-sheng
2018, 39(3): 40-43. doi: 10.16779/j.cnki.1003-5508.2018.03.008
Abstract:
The technology of intersectional crossing between P. deltoides and P. davidiana was studied by five different treatments. And the hybrids and their parents were identified using morphological marker. The results showed that hybrids offspring of P.liaoningensis×P. davidiana were inclined to partial parent type, intermediate type and paternal parent type, while hybrids offspring of P.davidiana×P.liaoningensis were inclined to partial parent type and paternal parent type, which meant the hybrid progeny was true hybrids. The effect was better to break incompatible barriers by fumigating stigma with n-hexane followed by brushing stigma with the fluid extracted from pollen.
Impact of Water and Fertilizer Control on Toona ciliata var.pubescens Seedlings in Panzhihua Dry-hot Valleys
DAO Li-ping, LI Heng, ZHANG Chun-hua, WANG Chun-yi, PENG Hong-en, TANG Ping
2018, 39(3): 44-46,54. doi: 10.16779/j.cnki.1003-5508.2018.03.009
Abstract:
To cultivate strong seedlings for the afforestation in the barren mountains of Panzhihua,, the water and fertilizer control experiment was conducted to discuss the impact on seedlings of Toona ciliata var.pubescens. The results showed that water and fertilizer control significantly promoted the growth of seedlings. The response of the seedlings to the combination of water and fertilizer control experiments was different. There was no significant difference in seedling height and crown width under different treatments of water and fertilizer control. But there were significant differences in the seedling ground diameter between fertilization frequency and interaction of fertilization and irrigation frequency, of which fertilization frequency had the greatest impact, followed by interaction between fertilizer frequency and irrigation frequency. The best combination was fertilization and irrigation once a week.
Seedling Raising Techniques of Introduced Leucaena
CHENG Yong, LI Jiang, QIU Qiong, ZHANG Chun-mei, ZHONG Ping
2018, 39(3): 47-50,69. doi: 10.16779/j.cnki.1003-5508.2018.03.010
Abstract:
11 varieties of Leucaena were introduced from Hawaii, US. The inspection of seeds indexes and technology research of seed breeding were carried out and summarized in Puwen, Xishuangbanna. The results showed that soaking the seeds with hot water for 5 minutes could improve the germination percentage, and the method had better effect of seeding in the seedbed first and then transferring to the container after the cotyledon appearing than seeding directly in container. The forest soil could satisfy the requirement of seedling growth.
Introduction and Cuttage Experiment of Gynostemma pentaphyllum
GAO Hui-bin, LIAN Dong-ming, JIANG Yong, JING Wen-xiang, ZHOU Cheng-qiang
2018, 39(3): 51-54. doi: 10.16779/j.cnki.1003-5508.2018.03.011
Abstract:
The experiment was carried out with five-leaf and seven-leaf varieties from Pingli county of Shanxi, by comparing the 4 factors of cutting sites (twigs, old branches), number of knots, mulching film and drug concentration. The results showed that the survival rate of the old branches was significantly higher than that of twigs. In the case of cuttage with mulching film (F group), the growth potential was slightly better than that of no-film-covered (CK group);The higher the concentration of α-NAA, the larger the rooting number. Concentration variation of α-NAA showed no significant influence on the growth of Gynostemma pentaphyllum. When the concentration of α-NAA was 300cc, the growth was the best. There were significant differences respectively in vine length, root length and root number of 7 groups.
Amphibians,Reptiles and Mammal Survey of Zhanjiang Mangrove National Nature Reserve,Guangdong Province
DENG Ke, CHEN Qing-hua, JIANG Fan, CHEN Qin, ZHAO Long-hui, ZHU Bi-cheng, CUI Jian-guo
2018, 39(3): 55-60. doi: 10.16779/j.cnki.1003-5508.2018.03.012
Abstract:
Field surveys in Zhanjiang Mangrove National Nature Reserve were conducted respectively in April and October, 2017. Snap traps (1 330 traps per day) were used to capture small mammals, and the line transect method (60 transects) and interviews with local people were used to survey amphibians and reptiles. Combined with data in available references, there were 18 species of amphibians belonging to 1 order, 7 families and 13 genera; 13 species of reptiles belonging to 1 order, 6 families and 11 genera;21 species of mammals belonging to 4 orders, 7 families and 14 genera recognized in Zhanjiang Mangrove National Nature Reserve. Two species was listed in Chinese National Key Protected Wild Animals and 1 species of reptile was endemic to China. Analyses of composition of the fauna indicated that all amphibians, reptiles and 14 species of mammals belonged to Oriental realm. The management and reservation measures were proposed to protect the abundant amphibian, reptilian and mammalian resources in Zhanjiang Mangrove National Nature Reserve.
Analysis of Water-holding Capacity of Litters in Three Types of Near-mature Plantations in the Jinsha River Valleys
SHU Sheng-ping, WU Jun
2018, 39(3): 61-65. doi: 10.16779/j.cnki.1003-5508.2018.03.013
Abstract:
To understand the litter water-holding capacity of near-mature plantations in the jinsha river basin,studies were made of litter reserves, water-holding capacity, water-holding rate and water absorption rate in three typical forest types of the jinsha river basin.The results showed that dry litter reserves, water holding capacity, water holding rate, water absorption rate were different in different types of forest, the order of the indexes above were all as follows:softwood forest litter (Alnus cremastogyne) > hardwood forest litter (Cyclobalanopsis glauca) > coniferous forest litter (Pinus armandii). the variation rule of water holding capacity, water retention rate and the immersion time conformed to the logarithmic equation W=a×ln(T)+b (where a and B were constants), water absorption rate and time variation rule conformed to power equation W=a×t-b, and the difference reached the significant level (P<0.05). Softwood forest had higher water retention than the other two forest types. Through monitoring and research of dynamic variation on litter water holding capacity in three kinds of plantations, natural water content of litter varied between 13.75% and 63.62%, water-holding rate of undecomposed litter and half-decomposed litter varied respectively in 85.05%~323.41% and 147.66%~251.11%, the later varied in a smaller amplitude.
Analysis of Changes of the Landscape Pattern of Forest Land in Wangcang County
PENG Cheng
2018, 39(3): 66-69. doi: 10.16779/j.cnki.1003-5508.2018.03.014
Abstract:
Based on GIS spatial analysis technology, the landscape pattern of forest land in Wangcang county were studied quantitatively by using local forest land conservation planning data of 2010 and 2015, integrating with land use transform matrix and landscape index. The results showed that the change was dominated by pure forest and general shrub forest land in Wangcang County, the dominant patch types remained unchanged, the degree of landscape pattern heterogeneity reduced, so did the fragmentation degree. the patch shape tended to simplify, landscape connectivity increased and landscape diversity reduced.
Design and Implementation of the Information Sharing Platform of Forest Germplasm Resources in the Bailong River and the Taohe River Forest Areas
QI Hao, QUAN Li, WANG Yong-yuan, HUAN Xu-dong, ZHANG Xiao-lei, SUN Xue-gang
2018, 39(3): 70-76,82. doi: 10.16779/j.cnki.1003-5508.2018.03.015
Abstract:
The pilot work of forest germplasm resources investigation had been carried out in Gansu province. According to provisions of the national germplasm resources and standards, forest tree germplasm resources information sharing platform was designed and developed based on B/S architecture, Spring MVC design pattern, JSP as development language,MySQL database and forest germplasm resources investigation in the Bailong River and the Taohe River forest. The establishment and operation of the platform realized the preservation, evaluation, digital expression and utilization of forest germplasm resources, which would be convient to integrate data in the future. It also provided some development experience, data sharing and integration convenience for investigating germplasm resources comprehensively throughout the Gansu province.
The Influence of Land Use Type Changes on the Service Function of Urban Ecosystem——Taking Panzhihua City of Sichuan as an Example
DENG Xin-hao, PAN Xin
2018, 39(3): 77-82. doi: 10.16779/j.cnki.1003-5508.2018.03.016
Abstract:
The intense research on the urban ecosystem service function is the route one must take to achieve sustainable development of urban ecological system. A well-functioning urban ecosystem is the important foundation for sustainable development of urban ecological system. Otherwise, the changes in land-use also have an vital role in diverse ecosystem service function. It is not only connected with people's daily life, but also a vital reason for the value of ecosystem service function. Panzhihua, a city in Sichuan province, its value of ecosystem service function increased constantly because the increase of forest land and garden plots between 2005 and 2010. Apparently, it proved that the changes in land-use had a direct impact on urban ecosystem.
Analysis on the Cultivation Status Quo of Olea europaea and Industrial Development Strategies in Sichuan Province
JIN Yin-chun, GAO Shan, LIU Gai, CHEN Shan-bo, LIU Hai-ying, LIU Jun-li, LUO Hui, WANG Sha
2018, 39(3): 83-87. doi: 10.16779/j.cnki.1003-5508.2018.03.017
Abstract:
In this paper, investigation results were presented on the cultivation status quo of Olea europaea in Sichuan Province. The Domestication situation, production & output value and present issues encountered were analyzed for olive industrial development, following by practical strategies and proposals in order to be a valuable reference to Sichuan olive industry.
Volatile Components in Needles and Bark of Pinus yunnanensis, the Host Plant of Tomicus minor
XU Ying-kai, FENG Xiao-hui, WANG Hong-wei, YANG Wei, YANG Hua
2018, 39(3): 88-92,115. doi: 10.16779/j.cnki.1003-5508.2018.03.018
Abstract:
The volatile components were determined in bark and needles of Pinus yunnanensis, the host plant of Tomicus minor to explore the selection mechanism of T. minor on host plants and provide references for screening effective attractants of the plant origin and ecological control of T. minor. Extractive distillation combined with gas chromatograph-mass spectrometry (GC-MS) was selected to determine volatile components in needles and bark of P. yunnanensis. The needles contained 35 volatile components from 7 groups,including 24 terpenes, 5 alcohols, 2 ketones, 1 ether, 1 phenol, 1 ester and 1 alkane. The bark contained 34 volatile components from 7 groups,including 22 terpenes, 5 alcohols, 2 ketones, 1 ether, 1 phenol, 1 ester and 2 alkanes.
A Study of Classification and Sample Distribution of Biomass Modeling in Sichuan Based on Forest Inventory data
LAI Chang-hong, ZHANG Wen, LIU Bo, WANG Li-li, QIU Shuai, ZHAO Qing-xia, JIN Yan-qiang
2018, 39(3): 93-97. doi: 10.16779/j.cnki.1003-5508.2018.03.019
Abstract:
Based on the data of forest resources inventory in Sichuan Province for five consecutive times (in the year 1988, 1992, 2002, 2002 and 2007), the area of different forest types were analyzed statistically together with the accumulation changes of nearly 20 years. According to the present situation of forest distribution (tree species, forest age, origin, etc.), and forestry managementation and implementation of major forestry projects, the classification of biomass modeling was divided into 16 species (groups) by survey samples and wood scaling information from continuous investigation of Sichuan forest resources. The distribution range of DBH, altitude, longitude and latitude of the samples were determined on the basis of biomass survey, which could provide a scientific reference for the systematic study of wood biomass models in Sichuan.
Plus Tree Selection of Alnus cremastogyne by Principal Component Analysis
ZHOU Xian-ming, XU Chun, YANG Han-bo, CHEN Zhi, GUO Hong-ying, HUANG Zhen, WANG Zeliang
2018, 39(3): 98-102. doi: 10.16779/j.cnki.1003-5508.2018.03.020
Abstract:
A principal component analysis (PCA) method was established for plus tree selection of Alnus cremastogyne Burk.and the selection criteria were determined, which should provide a theoretical basis for the early seedling selection and selective breeding of A. cremastogyne. 157 plus trees were used as the research object. The growths and wood properties traits were analyzed by variance analysis and PCA method. The result showed that the stem fullness (SF) and stem straightness (ST) were no significant difference among forest stands, while the difference of other traits reached an extremely siginificant. Genetic variation of SF, ST and air density were small, but other traits showed rich genetic differences. The rich variability of A. cremastogyne provided the prerequisite condition for plus tree selection. By PCA analysis, height (H), diameter at breast height (DBH) and volume of timber (V) were used as the optimal criteria of selection. Eight plants with integrated superior growth were selected, including GZLD-5, GZLD-6, MYPW-8, GZTJ-1, GZLD-8, MYPW-7, MYPW-10 and GZLD-12. The results conformed to the phenotypic expression, which indicated that the optimization methods were scientific and feasible.
Advantages and Disadvantages of H-125 Helicopter and its Improvement in Forest Fire Prevention in the Northwest Plateau Area of Sichuan
HE Yong-gu, LI Bin-xi
2018, 39(3): 103-105. doi: 10.16779/j.cnki.1003-5508.2018.03.021
Abstract:
In this paper,a description was made of the performance and basic data of H-125 helicopter,and the relevant performance characteristics of main helicopters were analyzed and compared in forest aviation fire prevention, and the advantages and disadvantages of this model were found out in forest fire prevention. In view of the practice of aviation forest protection in the northwest plateau area of Sichuan in recent years, relevant improvement research has been carried out to better exert the role of H-125 helicopter in forest fire prevention in the region.
A Study of Native Walnut Germplasm Resources Survey in Chaotian District,Guangyuan City
ZHANG Bo, WANG Jun-lian, HOU Yin-tang, LI Bo, ZHAO Zhi-man, QIAO Quan-xiang
2018, 39(3): 106-109. doi: 10.16779/j.cnki.1003-5508.2018.03.022
Abstract:
Through the survey on the distribution of native walnuts in towns of the Chaotian district of Guangyuan City,three species of walnuts(Juglans regia L.), Sigillate walnut(J. sigillata Dode.) and wild walnuts(J. cathayensis Dode.) were identified. Among them, Shuoxing、Xiazao and Shuchao no.2 were the main varieties. And the germplasm resources with high breeding value mainly included six categories such as Thin-skinned walnut, Spicates walnut, Dark seed walnut, Triangular walnut, Red-flesh walnut and Giant walnut. The utilization status of walnut germplasm resources was analyzed in Chaotian District, and the countermeasures and suggestions were put forward for developing walnut germplasm resources in the next step.
Structural Analysis of the Typical Shrub Community in the Arid Valley of the Bailong River
LI Yu, QI Hao, WANG Fei, XIANG Mei, SHEN Ying, QUAN Li
2018, 39(3): 110-115. doi: 10.16779/j.cnki.1003-5508.2018.03.023
Abstract:
A preliminary investigation on the arid valley of the Bailong River showed that there were 173 species of shrubs and herbs in this area, among which 130 species were shrub plants belonging to 93 genera and 55 families. The largest number of species belonged to the Rosaceae with a total of 19 species, accounting for 14.6% of all shrub species in arid valleys. There were 43 species of herbs, belonging to 37 genera and 21 families, of which 10 species belonged to Compositae, accounting for 25.6% of all herbs. The main ecological vegetation in the arid valley of the Bailong River was shrub, the number of shrub species was 3.02 times that of herbaceous plants. The sum of the important values of the first 18 species of main shrubs accounted for 70.87% of the sum of the important values. The main dominant species were Wikstroemia chamaedaphne, Leptodermis potanini, Lespedeza bicolor, Ziziphus jujube and Hedysarum multjugum. The species number and biodiversity index of different slope directions were also different. The species number of convex shrub was the highest, Shannon-Wiener index and Simpson index were the largest, Gleason index of the plane was the largest, and it was similar to herbaceous plants and shrubs. The number of species was most convex and plane. The number of shrub species was the most in the semi-cloudy and semi-sunny slope, accounting for 70.77% of the total species. The Shannon-Wiener index, Simpson index and Margalef index were the largest in the semi-cloudy and semi-sunny slope, and only the Gleason index was the largest in the sunny slope.
A Study of Geographical Provenance Variation of a Woody Oil Plant (Prinsepia utilis) in the Karst Region
CAI Wei-dong, LIU Shao-xuan, WEI Rong-jing, WANG Yu-qi
2018, 39(3): 116-119. doi: 10.16779/j.cnki.1003-5508.2018.03.024
Abstract:
Through the study of the indexes of the proportion of seed weight in fresh fructification weight, length and width of the seed, oil content of seeds and thousand-grain weight of Prinsepia utilis Royle of different geographical provenances, the results showed that there were significant differences in the morphology and fresh fruit seed yield of different geographical provenances. The P. utilis seed had an oil content of 25% to 28%, and the thousand-grain weight of the seeds was 190 g~208 g.The temperature, altitude, rainfall and frost-free season of provenance were closely related to the indexes of proportion of seed weight in fresh fructification weight, length and width of the seed, thousand-grain weight and oil content of seeds.
A Study of the Growth of Bambusa rigida in Changning County of Sichuan Province
CAO Yi, ZENG Yong-hai, BIE Peng-fei, ZHAO Run, CHEN Jun-hua, CHEN Xiu-ming
2018, 39(3): 120-123,130. doi: 10.16779/j.cnki.1003-5508.2018.03.025
Abstract:
In this paper,in vestigations were made on the biomass (aboveground parts)of Bambusa rigida and physical and chemical properties of soil in Zhuhai town and Longtou town of Changning county The results showed that (1) the differences were not significant between 2 layers of soil(0~20 cm deep, 20~40 cm deep) in soil bulk density, total porosity and saturated water holding capacity (P<0.05). In the 0~20 cm soil layer, the total N, total K and available N showed a significant difference (P>0.05), but the rest data indicated no significant difference (P<0.05). (2) The number of 2-year-old bamboos was obviously larger than that of 1-year-old bamboos per hectare in Zhuhai town, the former was 1.77 times that of the latter, while the difference was not significant in Longtou town. (3) The average DBH of 1-year-old bamboos in Zhuhai town was smaller than that in Longtou town, while that of 2-year-old bamboos was higher than that in Longtou town. (4) The average biomass of 1-year-old bamboos in Zhuhai town and Longtou town was 11.22±2.34 T/per hectare and 6.64±0.87 T/per hectare respectively. The average biomass of 2-year-old bamboos was 39.23±8.66 T/per hectare and 8.10±2.12 T/per hectare respectively, all of which were significantly different (P<0.05). (5) In order to increase the output, it was necessary to adopt reasonable management measures, such as applying P fertilizer and K fertilizer.
Damage and Control Measures of Tessaratoma papillosa in Luzhou City
SHI Liang, LI Jun, LIU Yi, XIONG Ding-wei, LI Cai-jin, ZHANG Peng-ju
2018, 39(3): 124-126. doi: 10.16779/j.cnki.1003-5508.2018.03.026
Abstract:
Tessaratoma papillosa Drury was one of main pests of Litchi chinensis Sonn. and Dimocarpus longan Lour. in Luzhou city,and they were distributed in Longmatan District, Jiangyang District, Xuyong County, Hejiang County and Luxian County. Because of difficulties for pest control, it was suggested for the relevant departments of Luzhou city that a certain control strategy should be taken to reduce and control the quantity of T. papillosa Drury.
Discussion on Under-forest Economy Development Modes for Employees of State-owned Forest Industry
ZHAN Ke-cheng, TIAN Xing-min
2018, 39(3): 127-130. doi: 10.16779/j.cnki.1003-5508.2018.03.027
Abstract:
For employees of State-owned Forest Industry, forest management and protection should be the major work which the under-forest economy would be the assistant procedure to serve. With the guidance of "manage and patrol the mountains, guard and protect the forest",full use of the abundant and natural forest green ecological resources should be taken to guide employees to adapt working method to local conditions, and largely develop the under-forest economy mainly in under-forest cultivation and planting. Therefore, the employees could be settled in the mountains to guarantee their duty time, and find an effective way to increase their income.
Research on the Development for Medicinal Herbs in the Forest of the Mountain Area around the Sichuan Basin——A Case Study in Dayi County of Chengdu
ZHANG Wei-xiang, ZHANG Shuang-shuang, MO Kai-lin
2018, 39(3): 131-133. doi: 10.16779/j.cnki.1003-5508.2018.03.028
Abstract:
The Underwood planting industry developed greatly in Dayi County. Based on the analysis of the present situation, achievements and problems of underwood medicinal herbs in Dayi County, some measures and suggestions were put forward, including reasonable layout of industry size, improving the technical service system, promoting professional markets and innovative industry model mechanism.
The Present Situation of Forest Insurance and the Solution to the Predicament
WANG Qing-hui, CHOU Chang-hong
2018, 39(3): 134-136. doi: 10.16779/j.cnki.1003-5508.2018.03.029
Abstract:
Forest insurance was an important part of China's agricultural insurance system. Based on the predicament of forest insurance development, A series of solutions were put forwardin in this paper, including optimizing capital appropriation process and establishing compensation fund allocation system,etc.
Discussion on Forest Landscape Design for the Project of Forest Quality Upgrading in the Minjiang River and Dadu River Basins
WEN Jun, WANG Zhi-jun
2018, 39(3): 137-139. doi: 10.16779/j.cnki.1003-5508.2018.03.030
Abstract:
In this paper, the forest landscape design was discussed for Leshan forest quality upgrading project in the Minjiang and Dadu River basins, so as to lay the ecological foundation for building a beautiful Leshan and green development. Through the implementation of the project, efforts should be made to expand the greening rate, create ecological gardens in urban and rural areas, and gradually move towards the purpose of urban gardenization, rural shaded roads, farmers' courtyards with flowers and fruit trees and woody suburbs. By combing social benefits, economic benefits with ecological benefits of landscape greening, Leshan would be built into a great city for living, business and tourism
Discussion on Comprehensive Control Model of Rocky Desertification in Yanyuan County
YOU Shi-hui, ZENG Yong-hai, MIN Sheng-biao, CHEN Jun-hua, ZHU Zhi-fang
2018, 39(3): 140-143. doi: 10.16779/j.cnki.1003-5508.2018.03.031
Abstract:
As an important ecological problem, the phenomenon of rocky desertification largely influenced the establish ment of ecological environment and the development of social economy in Yanyuan County. In this paper, by using "the third monitoring database of rocky desertification in the karst area of Sichuan Province", different site factors were divided.And combined with the local economic development needs, 5 kinds of control models and treatments were put forward, including fruit forest, ecological forest, forest reservation (reinforcement planting involved), grass planting and engineering measures, which provided reference for the control of rocky desertification in the same area.
Research on Assets Evaluation methods of Non-state-owned Public Welfare Forest Purchased by Government
LI Min, WANG Ji-jie
2018, 39(3): 144-147,159. doi: 10.16779/j.cnki.1003-5508.2018.03.032
Abstract:
Assets evaluation was the key link in government purchasing Non-state-owned public welfare forest, not only considering its market value, investment, operational and income, etc.,, but also comprehensively considering its ecological service value. The market value was evaluated by different methods, according to forest quality, market condition, replacement cost of non-state owned public welfare forest. And the ecological value was also evaluated by evaluation index determined by its main ecological function. There were neither unified method and index system nor evaluation technology research on evaluating public welfare forest at present, which needed further study and promotion.
The Present Situation and Development Countermeasures of Camellia oleifera Production in Yibin County
ZHOU Cheng-qiang, QING Fu-jun
2018, 39(3): 148-151. doi: 10.16779/j.cnki.1003-5508.2018.03.033
Abstract:
In order to promote the fast, steady and healthy development of the oil-tea industry, the present situation and main problems were analyzed and summarized for the production of Camellia oleifera in Yibin. The development countermeasures were put forward for Yibin oil-tea industry, such as accelerating seedling breeding, improving operation level, improving investment mechanism, innovating management modes and extending industrial chains.
The Walnut Industry Development Analysis of Guangyuan City Based on the Smiling Curve
WU Zhi-wen
2018, 39(3): 152-155. doi: 10.16779/j.cnki.1003-5508.2018.03.034
Abstract:
Based on the "Smiling Curve",analysis was made of the aolvantages of the walnut park planting situation,the planting area,and the rapidly increasing yield and output value in Guangyuan City.At the same time,there were also the lack of seed breeding,disease and pest control,technological innovation,brand building and marketing,which showed the problems of low rate of improved variety,neglected management,slow development of new entity,weak industrial chain technology,less deep processing products,cost-income ratio and consumption tendency changes.Then some corresponding countermeasures were put forward,such as walnut industry chain supply-side reform, industry association+standard,reference to the California walnut industry association experience,strengthening the functions of intermediary organizations and the establishment of the brand and quality monitoring system;increasing support,innovating support mechanism,cultivation of new business entities,cooperation quality improvement;focusing on scientific research of walnut industry chain and industry+Internet and walnut forest tour integration.
Analysis of Current Status and Dynamic Change of Arbor Forest Carbon Reserve for Huili County in Recent Decade
TAO Wan-jin
2018, 39(3): 156-159. doi: 10.16779/j.cnki.1003-5508.2018.03.035
Abstract:
Based on the data from forest inventory in 2000 and 2015, the arbor forest carbon storage and carbon density in Huili County of Sichuan Province were estimated using the biomass expansion factor method. The results showed that Over the past 10 years, the total carbon reserves of arbor in Huili County exhibited a significant increase, which was a small carbon sink.The largest carbon reserve of the arbor forest was Pinus yunnanensis,which accounted for 49.37% of the total carbon reserves. The carbon storage of different ages from high to low were:near-mature forest > mature forest > middle aged forest > overmature forest > young forest.The carbon sink function of different trees at the same age were different.
A Preliminary Study of Targets and Models of Personnel Training for Forest Resources Monitoring
DENG Xiao-qu, WANG Huan, MA Ying
2018, 39(3): 160-162. doi: 10.16779/j.cnki.1003-5508.2018.03.036
Abstract:
At present,the world had entered the era of rapid development of scientific and technological knowledge.Personnel training played a vital role in social development.Based on the significance of forest resource monitoring,the cultivation of skilled personnel was particularly urgent and essential for forest resource monitoring.The demand for skilled personnel and training targets were expounded in this paper,and discussion was made of the new model of cultivating high-quality and comprehensive forestry professionals.