水土保持学报2025，Vol.39Issue(2)：309-317,347,10.DOI:10.13870/j.cnki.stbcxb.2025.02.030
增温和放牧对河西盐渍化草地土壤理化性质及酶活性的影响
Effects of Warming and Grazing on Soil Physicochemical Properties and Enzyme Activities in Salinized Grassland in Hexi Corridor
摘要
Abstract
[Objective]To explore the effects of grazing on soil enzyme activities in salinized grasslands during the freezing period under the background of global warming.[Methods]Taking salinized grasslands in the Hexi Corridor as the research objects,four treatments were set up,including control(CK),grazing(FCK),warming(W),and warming+grazing(FW),in order to explore the variation law and spatial distribution characteristics of soil enzyme activities under different treatments.[Results]Compared with CK,the FCK treatment significantly increased soil water content and total nitrogen content,and decreased soil organic carbon content.The W treatment reduced soil water content and increased soil organic carbon content and total nitrogen content by 97.61%and 16.89%,respectively.The FW treatment significantly increased soil water content,organic carbon content and total nitrogen content,while total phosphorus content of the FW treatment was significantly(40.81%)lower than that of CK.The FCK treatment significantly increased the activities of β-glucosidase,amylase,urease and phosphatase;the W treatment significantly increased the activities of amylase,urease and nitrite reductase,while the FW treatment increased the activities of β-glucosidase,amylase,urease and nitrate reductase.Compared with other treatments,the stoichiometric ratios of soil enzymes in W and FW treatments were significantly increased.Through vector analysis,it was found that the study area was significantly limited by nitrogen.[Conclusion]Warming and grazing treatments directly or indirectly affect soil enzyme activities through soil physicochemical properties,of which SOC is one of the key factors affecting soil enzyme activities in salinized grasslands in Hexi Corridor.关键词
增温/放牧/酶活性/化学计量比Key words
warming/grazing/enzyme activity/stoichiometric ratio分类
农业科技引用本文复制引用
孙佳星,徐国荣,成鑫栋,王雨媛,吴江琪..增温和放牧对河西盐渍化草地土壤理化性质及酶活性的影响[J].水土保持学报,2025,39(2):309-317,347,10.基金项目
国家自然科学基金青年基金项目(42307348) （42307348）
甘肃省拔尖领军人才培育项目(GSBJLJ-2023-09) （GSBJLJ-2023-09）
甘肃农业大学伏羲青年人才项目(Gaufx-05Y05) （Gaufx-05Y05）
草业生态系统教育部重点实验室开放项目(KLGE-2022-19) （KLGE-2022-19）
甘肃农业大学科研启动项目(GAU-KYQD-2021-15) （GAU-KYQD-2021-15）
