中国草地学报2025，Vol.47Issue(12)：68-76,9.DOI:10.16742/j.zgcdxb.20250149
典型草原土壤养分对放牧的响应研究
Response of Soil Nutrients to Grazing in the Typical Steppe
摘要
Abstract
The typical steppe has long experienced high intensity grazing pressure,resulting in biodiver-sity loss and the degradation of ecosystem services.Although appropriate grazing can promote nutrient cycling and improve soil nutrient levels in grassland ecosystems,the specific effects of rational grazing on soil nutrient dynamics in typical steppe regions remains insufficiently understood.In this study,five repre-sentative steppe zones in Hulunbuir City were selected as research sites.Comparative experiments were conducted between grazing balance zones(supporting 0.6 to 1.5 sheep units per hectare)and grazing exclu-sion areas to examine soil nutrient variations across different soil depths.The results showed that soil nutri-ent indicators,including organic carbon,total nitrogen,total phosphorus,total potassium,and available phosphorus,were consistently higher in grazing balance zones than in grazing exclusion areas.Grazing exclusion exerted positive effects on soil organic carbon and total nitrogen across all layers(0-30 cm)in regions with lower aridity indices.The grazing response ratios of major soil nutrients exhibited strong corre-lations with climatic factors:grazing response ratio of soil total nitrogen was significantly positively corre-lated with grazing response ratio of soil total phosphorus,available phosphorus and aridity index,grazing response ratio of soil total phosphorus showed a highly positive correlation with aridity index,while all nutrient response ratios were negatively correlated with precipitation.In conclusion,rational grazing effec-tively enhances soil nutrient levels in typical steppe ecosystems.关键词
放牧/土壤养分/草畜平衡区/禁牧区Key words
Grazing/Soil nutrient/Grazing balance zones/Grazing exclusion area分类
农业科技引用本文复制引用
SONG Xiangyang,HAN Tingting,WEI Wei,XU Jing,WANG Zhen,HOU Ruihong,ZHAO Weixuan,YANG Junyi,YUN Xiangjun..典型草原土壤养分对放牧的响应研究[J].中国草地学报,2025,47(12):68-76,9.基金项目
内蒙古自治区自然科学基金项目(2025MS03124,2023MS03012,2025QN07031) （2025MS03124,2023MS03012,2025QN07031）
内蒙古自治区科技计划项目(2021GG0394) （2021GG0394）
