The impact of human activity on the biomass allocation of a medicinal herbaceous species in an agroforestry system of Southwest China
文献类型： 外文期刊
作者： Zhang, J. 1 ; Shen, T. 2 ; Zhao, Y. L. 1 ; Jin, H. 1 ; Wu, L. H. 1 ; Liu, H. G. 3 ; Wang, Y. Z. 1 ;
作者机构： 1.Yunnan Acad Agr Sci, Inst Med Plants, Kunming 650200, Peoples R China
2.Yuxi Normal Univ, Coll Resources & Environm, Yuxi 653100, Peoples R China
3.Yunnan Agr Univ, Kunming 650201, Peoples R China
关键词： Allometry;Medicinal plant;Non-timber forest products;Understory species
期刊名称：AGROFORESTRY SYSTEMS （ 影响因子：2.549； 五年影响因子：2.517 ）
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收录情况： SCI
摘要： Human activity has a greater influence on plants than on any of the other components of the environment. We used material from cultivated and wild Coptis teeta populations in the Hengduan Mountains to test the null hypothesis that there is no effect of human activity on the biomass allocation of an herbaceous understory species in a forest ecosystem. At the plot level, an isometric relationship existed in most of the significant relationships. However, at the individual level, an allometric relationship existed in most of the log-log relationships. Human activity could significantly affect the slope of the linear relationship of leaf versus total biomass; and also the intercepts of the relationships of root biomass versus total biomass, plant height versus total biomass and reproductive versus vegetative biomass. At any given plant body size, wild C. teeta has higher biomass in the leaf and less in root than cultivated counterpart. But the trajectories of log rhizome biomass versus log total biomass were the same for both cultivated and wild individuals. Thus, we conclude that (1) the allometric trajectories change at different scales and (2) C. teeta-based agroforestry system could ensure sustainable use of this medicinal plant because of the stable biomass allocation to the salable rhizome organs.
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