草原与草坪2025，Vol.45Issue(2)：32-42,11.DOI:10.13817/j.cnki.cyycp.2025.02.004
人工修复和模拟增温对高寒草地土壤团聚体稳定性及其养分分布的影响
Effects of artificial restoration and simulated warming on soil aggregate stability and nutrient distribution of artificial grassland in alpine grassland area
摘要
Abstract
[Objective]To explore the effects of climate warming on soil aggregate stability and nutrient distribu-tion in alpine grassland under different restoration methods.[Method]Three restoration measures including natural restoration(NR),no-tillage reseeding(S)and tillage reseeding(TS)were set up in the alpine grassland of the Qinghai-Tibetan Plateau,and the severely degraded grassland(ND)was used as the control.The effects of warm-ing on the stability of soil aggregates and nutrient distribution in alpine grassland with different restoration measures were studied by passive warming-open-top chamber(OTC)simulation.[Result]Remediation measures had a significant effect on the contribution rate of LOC to macroaggregates in each treatment.The interaction of simulated warming,simulated warming and remediation measures had a significant effect on the organic carbon(TOC)of mac-roaggregates in each treatment.The geometric mean diameter(GMD)and mean weight diameter(MWD)of soil aggregates in NR treatment were the highest,reaching 0.76 mm and 1.36 mm,respectively,which were significantly higher than those in other treatments,and the mass fraction,GMD and MWD of aggregates in TS treatment were the lowest.Warming significantly reduced R0.25,GMD and MWD in NR treatment.The contents of TOC and TN in ag-gregates were the highest in ND treatment,and the contents of TOC and TN in aggregates were reduced by NR and TS treatments.[Conclusion]The natural restoration plot is beneficial to improve the stability of aggregates and the enrichment of active organic carbon,but the warming process leads to the decrease of aggregate stability in the natural restoration plot.Tillage treatment is not conducive to the improvement of soil aggregate stability and the fixation of nutrients in aggregates in alpine grassland.关键词
高寒草地/模拟增温/土壤团聚体/团聚体养分分布Key words
alpine grassland/simulated warming/soil aggregates/aggregates nutrient distribution分类
农业科技引用本文复制引用
郑晒坤,冉林灵,严双,姜晓敏,夏菲,魏巍,王敬龙,杨彩红,王军强,薛云尹,石昊,吴皓阳..人工修复和模拟增温对高寒草地土壤团聚体稳定性及其养分分布的影响[J].草原与草坪,2025,45(2):32-42,11.基金项目
西藏自治区重点研发与转化项目(XZ202201ZY0005N) （XZ202201ZY0005N）
