草原与草坪2025，Vol.45Issue(5)：36-48,13.DOI:10.13817/j.cnki.cyycp.2025.05.004
不同恢复措施对青藏高原东部退化高寒草地生产力和群落特征的影响
Effects of different restoration measures on vegetation productivity and functional groups of degraded alpine grassland in Gannan
摘要
Abstract
[Objective]Overgrazing and climate change in recent years have led to varying degrees of degradation of alpine grasslands on the Qinghai-Tibetan Plateau,with declining productivity and ecological service functions.How to effectively restore degraded alpine grasslands has become an urgent issue for the sustainable development of the Tibetan Plateau.[Method]In this study,five treatments,S1(rodent prevention and control),S2(S1+Rest grazing in the regreening later period for 30 d+mechanical no—tillage replanting),S3(S1+Rest grazing in the re-greening later period for 45 d+mechanical no-tillage replanting),S4(S2+mechanical no-tillage fertilization)and S5(S3+mechanical no-tillage fertilization),were set up in the moderately degraded alpine meadow meadows in Xiahe County,the northeastern edge of the Qinghai-Tibetan Plateau.[Result]All restoration measures increased vegetation cover and total biomass,with the S5 treatment increasing to 99.33％and 3074.29 g/m2 on average over the three-year restoration period,which was significant(P＜0.05);all restoration measures increased the biomass of grass forage and miscellaneous grass forage,and decreased the biomass of sedge and inedible forage;The S4 and S5 treatments significantly reduced species richness,Shannon diversity index,and Simpson dominance and evenness index(P＜0.05),while this adverse effect gradually disappeared two years after the restoration;the S1,S2,and S3 treatments had no significant effect on community diversity.[Conclusion]The integrated restoration measures of Rest grazing in the regreening later period for 45 d+Rodent control+Mechanical no-tillage reseeding+Me-chanical no-tillage fertilizer were condensed to be beneficial to the ecological restoration of degraded grassland in Xiahe County.This study provides data support for the restoration and management of degraded alpine grassland eco-systems in Gannan,the upper reaches of the Yellow River basin.关键词
高寒草地/返青期休牧/补播/施肥/草地生产力/草地群落Key words
alpine grassland/rest grazing in the regreening period/reseeding/fertilization/grassland productivity/grassland community分类
农业科技引用本文复制引用
WANG Zheng-wen,CAO Wen-xia,MA Long-xi,CAO Guo-shun,SHI Shang-li..不同恢复措施对青藏高原东部退化高寒草地生产力和群落特征的影响[J].草原与草坪,2025,45(5):36-48,13.基金项目
国家自然科学基金项目-青藏高原高寒草甸冷季补饲放牧牦牛的生态系统效应与机理(U21A20242) （U21A20242）
