Effects of slope positions on growth and biomass accumulation, allocation and allometry of Polygala fallax in Phyllostachys edulis forest

doi:10.3969/j.issn.1000-2006.201909037

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (6): 79-84.doi: 10.3969/j.issn.1000-2006.201909037

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Effects of slope positions on growth and biomass accumulation, allocation and allometry of Polygala fallax in Phyllostachys edulis forest

GUO Ziwu¹(), YANG Liting¹, LIN Hua², CHEN Shuanglin¹^,^*(), YANG Qingping¹

1. Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, China
2. Forestry Bureau of Shaxian County, Shaxian 365500, China

Received:2019-09-17 Revised:2019-11-05 Online:2020-11-30 Published:2020-12-07
Contact: CHEN Shuanglin E-mail:guoziwu@caf.ac.cn;cslbamboo@126.com

Abstract

Abstract:

【Objective】The compound management of Phyllostachys edulis and Chinese herb is an important approach for enhancement of the economical and ecological benefits of bamboo forests. The growth and biomass accumulation and allocation of Polygala fallax of different slope positions in Phyllostachys edulis forest were investigated. This research will provide theoretical guidance for the compound management of forest with Phyllostachys edulis and Polygala fallax. 【Method】The compound management forest with Phyllostachys edulis and Polygala fallax was planted with two-year cutting seedlings of Polygala fallax in March 2018. Growth, biomass of leaf, stem and root of Polygala fallax of different slope positions in Phyllostachys edulis forest were investigated in April 2019. Biomass accumulation, allocation, and allometric growth were also analyzed. 【Result】The survival rate of Polygala fallax in Phyllostachys edulis forest was higher than 92% and there were no significant differences among different slope positions. With the decreasing slope, the basal diameter and height increased in fluctuation, while organs and total biomass all increased remarkably. Biomass proportions for leaf deceased markedly and that for stem and root all increased considerably. Biomass and its proportion and allometric growth indices for root-total biomass of Polygala fallax from the middle slope were highest compared to those of the other slopes. 【Conclusion】Polygala fallax can adapt to bamboo forest habitats and grow well. It is a suitable species for the bamboo forest compound management. Polygala fallax at the middle slope grew better with high biomass, especially for root biomass, and its proportions were the highest of the three slopes; the middle slope is the suitable slope for adequate growth and high value of Polygala fallax in the bamboo forest.

Key words: Phyllostachys edulis, Polygala fallax, biomass accumulation and allocation, allometric growth

CLC Number:

S718

GUO Ziwu, YANG Liting, LIN Hua, CHEN Shuanglin, YANG Qingping. Effects of slope positions on growth and biomass accumulation, allocation and allometry of Polygala fallax in Phyllostachys edulis forest[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2020, 44(6): 79-84.

Figures/Tables 3

References 31

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坡位 slope	成活率/% survival rate	地径/mm basal diameter	苗高/cm height	根径/mm root diameter	根长/cm root length
上坡位 upper slope	92.58± 2.69 a	4.88± 0.23 b	40.91± 3.56 c	5.95± 0.23 c	24.95± 1.02 c
中坡位 middle slope	94.29± 4.12 a	7.53± 0.36 a	62.45± 4.26 b	8.78± 0.36 a	38.75± 2.33 a
下坡位 lower slope	95.11± 3.55 a	7.05± 0.45 a	77.76± 4.39 a	7.39± 0.41 b	32.56± 2.15 b

Effects of slope positions on growth and biomass accumulation, allocation and allometry of Polygala fallax in Phyllostachys edulis forest

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