氮添加对中国草地生物量和土壤有机碳含量影响的Meta分析

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中图分类号：S153 文献标识码：A 文章编号：1007-0435（2025）07-2078-1

doi：10.11733/j.issn.1007-0435.2025.07.004

引用格式：，等.氮添加对中国草地生物量和土壤有机碳含量影响的Meta分析[J].草地学报，2025，33（7）：2078-2089LIU Chang，CHEN Ji-shan，ZHURui-fen，et al.Meta-analysis of the Impactsof Nitrogen Adition on Biomas andSoil Organic Carbon Content of China Grasslands[J].Acta Agrestia Sinica，2O25，33（7）：2O78-2089

Meta-analysis of the Impacts of Nitrogen Addition on Biomass and Soil Organic Carbon Content of China Grasslands

LIU Chang1.2.3，CHEN Ji-shan23， ZHU Rui-fen2.3， SUN Wan-bin2，3， YAO Bo2，³，DONG Shui-ku1il4* （1.VeterinaryMedicineand Qinghai AcademyofAnimal Science，VeterinaryMedicineand AcademyofAnimalScience， QinghaiUniversityXining，QinghaiProvince8016，China;2.ChongqingAcademyofAnimalScience，Chongqing4246Cina; 3.PrataculturalEneigndtcoloesearchcnterofogig，ogg246ina；4oofrassandScieein ForestryUniversity，BeijinglOoo83，China）

Abstract：In order to explore the effects ofdifferent nitrogen addition states on grassland biomass，soil organic carbon（SOC），and microbial biomass carbon（MBC），a meta-analysis method was used to select 65 docu ments and 416 sets of data，and the effects of nitrogen addition conditions（Duration of Naddition，Rate of N addition and Duration of N addition），grassland types （Alpine grassland/meadow，desert grassand，typical grassland/meadow，meadow grassand），and climate factors （mean annual temperature （MAT），mean annual precipitation（MAP）） on the aboveground and belowground biomass，SOC and MBC of grassland ecosystems were investigated through subgroup analysis.The results showed that nitrogen application significantly affected grassland biomass and SOC；both urea and NH4NO3 nitrogen application significantly increased aboveground and underground biomass and SOC content （ .P<0.05 ；the durationofNaddition was more than5years，and the biomass，SOC and MBC contents increased. In grasslands with MAT >0∘C ，aboveground and underground biomass and SOC content increased after nitrogen application. Therefore，when conducting nitrogen addition in grassland ecosystems，the effects of both biotic and abiotic factors on soil organic carbon should be considered.The research findings have important implications for the scientific formulation of grassland conservation and management strategies.

Key words：Nitrogen adition;Soil organic carbon; Grassland ecosystem; Biomass;Mean annual temperature; Mean annual precipitation

近年来，全球大气氮沉降速率逐年增加，预计到2050年将比工业革命前增加近3倍1]。（剩余26053字）