草业学报2025，Vol.34Issue(10)：62-73,12.DOI:10.11686/cyxb2024438
不同牧草补播模式对荒漠草原植物群落结构及土壤特性的影响
Effects of different forage reseeding patterns on plant community structure and soil characteristics in desert steppe
摘要
Abstract
We conducted an in-depth analysis of reverse succession in degraded desert grasslands to identify its driving factors.A field experiment was conducted in degraded desert grasslands of Ningxia,and the changes in plant community characteristics,soil physicochemical properties,and their correlations under different forage reseeding configurations(a grass mixture P1,a legume mixture P2,and a grass-legume mixture P3)were investigated.The effects of reseeding configurations on plant community structure and soil nutrient contents were also evaluated.The results show that forage reseeding of the degraded pasture increased the proportion of legumes in plant communities,and resulted in increased vegetation cover and increased values of Simpson's,Shannon-Wiener's,and Margalef's indexes.Reseeding with the grass-legume mixture increased the aboveground biomass of the plant community.Reseeding with the grass mixture significantly reduced soil bulk density,and reseeding with either the grass mixture or the grass-legume mixture decreased soil electrical conductivity.All the reseeding treatments resulted in increased total phosphorus and potassium contents in the 0-10 cm and 10-20 cm soil layers,increased organic carbon and total nitrogen contents in the 0-10 cm soil layer,and increased pH in the 10-20 cm layer;and decreases in soil pH in the 0-10 cm soil layer and organic carbon content in the 10-20 cm soil layer.The organic carbon and total nitrogen contents in the 0-10 cm soil layer showed positive correlations with plant community diversity indexes(Simpson's,Shannon-Wiener's,and Margalef's indices).Key factors driving vegetation restoration included organic carbon and total phosphorus contents in surface soil(0-10 cm),along with pH and total phosphorus content in the subsurface soil layer(10-20 cm).The grass-legume mixed configuration demonstrated optimal performance in enhancing grassland productivity,improving plant communities,and optimizing the soil nutrient profile.Therefore,reseeding with a grass-legume mixture is the preferred approach for restoration of degraded desert grasslands.关键词
荒漠草原/牧草补播/植物群落特征/土壤理化性质Key words
desert grassland/forage reseeding/plant community characteristics/soil physical and chemical properties引用本文复制引用
鲍平安,文志林,王炎,陈彦虎,季波,王占军,吴旭东,蒋齐..不同牧草补播模式对荒漠草原植物群落结构及土壤特性的影响[J].草业学报,2025,34(10):62-73,12.基金项目
自治区农业科技自主创新资金农业高质量发展和生态保护科技创新示范课题(NGSB-2021-14-06),自治区青年拔尖人才培养项目,自治区重点研发(引才专项)(2024BEH04058),宁夏农林科学院科技平台建设提升项目(NKYP-22-06)和宁夏农牧交错带温性草原生态系统定位观测研究站资助. （NGSB-2021-14-06）
