草原与草坪2025，Vol.45Issue(2)：14-23,10.DOI:10.13817/j.cnki.cyycp.2025.02.002
青藏高原退化高寒草甸植被群落与土壤养分变化特征
Characterization of vegetation communities and soil nutrient changes in degraded alpine meadows on the Qinghai-Tibetan Plateau
摘要
Abstract
[Objective]Taking the moderately degraded alpine meadows in Sanjiangyuan area as the research ob-ject,we analyzed the dynamic changes of plant community characteristics,soil nutrients,and their variability in de-graded alpine meadows.This investigation aims to explore the relationship between the two,and to identify the key factors affecting plant community characteristics.The findings provide the basic data for the scientific management and sustainable utilization of degraded alpine meadows in Qinghai-Tibetan Plateau.[Method]Field measurements were conducted in Yushu Prefecture,Qinghai Province,in the months of July,August,and September from 2020 to 2022.Plant height,cover,Patrick index,Pielou's evenness index,Shannon-Wiener index,and total biomass of plants were recorded.Soil samples were analyzed for total nitrogen,ammonium nitrogen,nitrate nitrogen,quick nitrogen,or-ganic carbon,total phosphorus,and total potassium.The one-way analysis of plant and soil indicators was used to analyze the correlation between plant community characteristics and soil nutrients.The RDA analysis of vegetation characteristics and soil physicochemical properties was performed using Canoco 5.0 software to evaluate the relation-ship between vegetation traits and soil physiochemical properties.[Result]The Patrick index,Pielou's index,and to-tal biomass displayed significant monthly variation but no consistent seasonal trend.In contrast,the biomass of plant functional groups generally increased over time,with consistent patterns across years(except for miscellaneous grasses in 2022).Soil total nitrogen,ammonium nitrogen,nitrate nitrogen,quick nitrogen and organic carbon peaked in August.Soil total phosphorus and total potassium showed strong positive correlations with total plant biomass,height,and Pielou's index,and significant negative correlations with the Patrick index.Plant cover was positively cor-related with soil total nitrogen and organic carbon,while the Shannon-Wiener index and total biomass were positively correlated with soil nitrate nitrogen.[Conclusion]Plant community characteristics and functional group biomass in de-graded alpine meadows exhibited variable seasonal patterns,with most indicators peaking in August.There was a sig-nificant positive correlation between soil nutrients and plant communities,with soil organic carbon and total nitrogen being the most influential factor.关键词
青藏高原/高寒草甸/植被多样性/土壤养分/动态变化Key words
Qinghai-Tibetan Plateau/alpine meadows/vegetation diversity/soil nutrients/dynamic changes分类
农业科技引用本文复制引用
林伟山,德科加,向雪梅,冯廷旭,李菲,魏希杰..青藏高原退化高寒草甸植被群落与土壤养分变化特征[J].草原与草坪,2025,45(2):14-23,10.基金项目
青海省科技厅重点研发与转化计划项目(2024-NK-137) （2024-NK-137）
青海三江源草地生态系统国家野外科学观测研究站(K9922050) （K9922050）
