草地学报2026，Vol.34Issue(6)：2001-2011,11.DOI:10.11733/j.issn.1007-0435.2026.06.004
不同放牧方式对高寒草地土壤养分及酶活性的影响
Effects of Different Grazing Patterns on Soil Nutrients and Enzyme Activities in Alpine Grassland
摘要
Abstract
Grazing is one of the main ways to utilize grassland.A reasonable grazing method can achieve sustain-able utilization of grassland.However,most studies focus on grazing of a single livestock species or fixed-proportion mixed grazing,lacking exploration of the impact of different proportion mixed grazing on grassland ecosystem.This study investigated the effects of different herbivore assemblage grazing on soil nutrients and enzyme activities based on the alpine grasslands of the Qinghai-Tibet Plateau.The experiment was established including a control(CK),yak-only grazing(YG),Tibetan sheep-only grazing(SG),and mixed grazing of yaks and Tibetan sheep(MG1∶2,MG1∶4,MG1∶6).Plant and soil samples were collected from the experi-mental plots from the 6th to the 8th year of grazing to analyze changes in grassland plant biomass,soil total nutrients(total carbon,total nitrogen,total phosphorus),and the activities of enzymes related to carbon and nitrogen cycles(nitrate reductase,nitrite reductase,urease,hydroxylamine reductase,amylase,and neutral protease).The results showed that both grazing patterns and experimental year had significant interactive effects on the activities of carbon-and nitrogen cycle-related soil enzymes.Soil nutrients and enzyme activities exhibited significant interannual dynamic characteristics.Mixed grazing had distinct effects on soil nutrients and enzyme activity compared to single-species grazing.As the grazing duration increases,the mixed grazing system with a yak-to-Tibetan sheep ratio of 1:2 or 1:4 gradually restores the soil nutrients and enzyme activity of alpine grasslands to levels closer to those of natural grasslands.The results suggest that grazing with different livestock combinations is more conducive to maintaining the stability of grassland ecosystem functions.关键词
混合放牧/土壤生态化学计量比/放牧管理/土壤酶活性Key words
Herbivore assemblage grazing/Soil ecological stoichiometry/Grazing management/Soil enzyme activity分类
农业科技引用本文复制引用
高瑾安,王佳敏,时光,刘文涛,刘玉祯,刘文亭,杨晓霞,董全民,孙盛楠..不同放牧方式对高寒草地土壤养分及酶活性的影响[J].草地学报,2026,34(6):2001-2011,11.基金项目
三江源区高寒草地生态教育部重点实验室开放基金课题(2023-SJY-KF-02)资助 （2023-SJY-KF-02）
