A Quantitative Study of Below-and-above-ground Competitions of <i>Idesia polycarpa</i> Seedlings at Different Planting Densities

JIA Chen; WANG Sha; GU Yun-jie; ZHONG Zhi-ping; LUO Jian-xun; GAO Jie; LI Chang-an

doi:10.16779/j.cnki.1003-5508.2015.05.003

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Volume 36 Issue 5

Nov. 2019

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Article Navigation > Journal of Sichuan Forestry Science and Technology > 2015 > 36(5): 11-15

JIA Chen, WANG Sha, GU Yun-jie, ZHONG Zhi-ping, LUO Jian-xun, GAO Jie, LI Chang-an. A Quantitative Study of Below-and-above-ground Competitions of Idesia polycarpa Seedlings at Different Planting Densities[J]. Journal of Sichuan Forestry Science and Technology, 2015, 36(5): 11-15. doi: 10.16779/j.cnki.1003-5508.2015.05.003

Citation:

JIA Chen, WANG Sha, GU Yun-jie, ZHONG Zhi-ping, LUO Jian-xun, GAO Jie, LI Chang-an. A Quantitative Study of Below-and-above-ground Competitions of Idesia polycarpa Seedlings at Different Planting Densities[J]. Journal of Sichuan Forestry Science and Technology, 2015, 36(5): 11-15. doi: 10.16779/j.cnki.1003-5508.2015.05.003

A Quantitative Study of Below-and-above-ground Competitions of Idesia polycarpa Seedlings at Different Planting Densities

doi: 10.16779/j.cnki.1003-5508.2015.05.003

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Sichuan Academy of Forestry, Chengdu 610081, Sichuan, China;Southwest China Forestry University, Kunming 650000, Yunnan, China;West China Normal University, Nanchong 637002, Sichuan, China;Sichuan Meidong Agricultural Science and Technology Co., Ltd, Chengdu 610081, Sichuan, China

Received Date: 2015-06-06

Abstract

To quantify the competition from above-and-below-ground plants,an experiment was conducted by use of seedlings of Idesia polycarpa. Path analysis was employed to study both the relationships between below-and-above-ground competitions, and their contribution to general competitions among individual seedlings at 3 different planting densities. The results showed that there were close relationships between below-ground biomass,above-ground biomass and total mass of Idesia polycarpa seedlings and the growing densities. With the decrease of the density,the seedling biomass increased while each part of the competition index fell. The above-ground competition index was greater than the underground at the same planting density. Due to the interactions between each part as the plants grew,the correlations among competition indexes were significant coefficients of path analysis,at 3 planting densities,showing that the direct influence intensity of above-ground competition on general competition wafted from 0.5536 to 0.6533,significantly greater than 0.4802~0.6228 of the underground competition. With the decrease of the density, the above-ground-and-below-ground competitions were intense, however, the above-ground competition had an important influence on the general competition.
- Idesia polycarpa Maxim. ;
- growth competition;
- above-ground competition;
- below-ground competition;
- quantitative study
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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A Quantitative Study of Below-and-above-ground Competitions of Idesia polycarpa Seedlings at Different Planting Densities

doi: 10.16779/j.cnki.1003-5508.2015.05.003

Sichuan Academy of Forestry, Chengdu 610081, Sichuan, China;Southwest China Forestry University, Kunming 650000, Yunnan, China;West China Normal University, Nanchong 637002, Sichuan, China;Sichuan Meidong Agricultural Science and Technology Co., Ltd, Chengdu 610081, Sichuan, China

Received Date: 2015-06-06

Key words:

Abstract: To quantify the competition from above-and-below-ground plants,an experiment was conducted by use of seedlings of Idesia polycarpa. Path analysis was employed to study both the relationships between below-and-above-ground competitions, and their contribution to general competitions among individual seedlings at 3 different planting densities. The results showed that there were close relationships between below-ground biomass,above-ground biomass and total mass of Idesia polycarpa seedlings and the growing densities. With the decrease of the density,the seedling biomass increased while each part of the competition index fell. The above-ground competition index was greater than the underground at the same planting density. Due to the interactions between each part as the plants grew,the correlations among competition indexes were significant coefficients of path analysis,at 3 planting densities,showing that the direct influence intensity of above-ground competition on general competition wafted from 0.5536 to 0.6533,significantly greater than 0.4802~0.6228 of the underground competition. With the decrease of the density, the above-ground-and-below-ground competitions were intense, however, the above-ground competition had an important influence on the general competition.