浙江农林大学学报2024，Vol.41Issue(4)：797-809,13.DOI:10.11833/j.issn.2095-0756.20230448
晋西黄土区典型植被恢复生态系统各层次化学计量与生态因子的关系
Relationship between stoichiometry and ecological factors at various levels of typical vegetation restoration ecosystem in the loess area of western Shanxi Province
摘要
Abstract
[Objective]Vegetation restoration is an important method of improving soil erosion and ecological environment in the Loess Plateau.This study aims to assess the impact of vegetation restoration on nutrient cycling and ecological service functions in ecosystem,and further clarify the stoichiometry and distribution characteristics of chemical elements in forest vegetation and soil,which is of great importance for selecting rational models of vegetation restoration.[Method]4 typical vegetation restoration types were selected in the loess area of western Shanxi Province,namely Pinus tabuliformis plantation,Robinia pseudoacacia plantation,Platycladus orientalis plantation,and Quercus mongolica natural forest.The contents of carbon(C),nitrogen(N),phosphorus(P)in branches,leaves,trunks,barks,roots of the tree layer,as well as those in the aboveground and underground parts of the shrub layer,herbaceous layer,and 0-100 cm soil layers were determined respectively.The effects of vegetation restoration types on nutrient cycling and eco-stoichiometry were analyzed by single factor analysis of variance(ANOVA),minimum significant difference(MSD)and redundancy analysis(RDA).[Result](1)Compared with other vegetation restoration types,the shrub layer and herbaceous layer in Q.mongolica forest had the highest biomass,with aboveground biomass of(8.62±0.78)and(5.91±0.18)t·hm-2 and underground biomass of(3.65±0.36)and(3.54±0.25)t·hm-2,respectively.(2)Q.mongolica natural forest had the highest C content,which was(552.90±19.33)g·kg-1,and the lowest N content,which was(10.36±0.30)g·kg-1.(3)There was a significant correlation(P＜0.05)between C,N and P contents in plants and soil.Soil C and P ratio in Q.mongolica was the highest(15.22±0.28),while that in R.pseudoacacia was the lowest(8.28±0.26).(4)Mantel Test and RDA showed that there was a significant correlation between nutrients in soil and vegetation in plantation forests(P＜0.05),but in Q.mongolica natural forest,the correlation was relatively small and the influence of tree layer on soil and vegetation stoichiometric characteristics was relatively weak.[Conclusion]Near natural afforestation can promote vegetation diversity and provide better ecosystem services.[Ch,5 fig.2 tab.41 ref.]关键词
黄土高原/植物器官/植被恢复类型/生态化学计量Key words
Loess Plateau/plant organs/vegetation restoration type/ecological stoichiometry分类
农业科技引用本文复制引用
詹紫馨,冯天骄,梅柏寒,王平..晋西黄土区典型植被恢复生态系统各层次化学计量与生态因子的关系[J].浙江农林大学学报,2024,41(4):797-809,13.基金项目
国家重点研发计划项目(2022YFB420202100) （2022YFB420202100）
国家自然科学基金资助项目(42371114) （42371114）
黄土高原土壤侵蚀与旱地农业国家重点实验室开放基金(F2010121002-202422) （F2010121002-202422）
