草业科学2025，Vol.42Issue(8)：1945-1958,14.DOI:10.11829/j.issn.1001-0629.2024-0252
封育对伊犁绢蒿荒漠土壤酶活性及其化学计量特征的影响
Effects of grazing exclusion on soil enzyme activity and stoichiometric characteristics of Seriphidium transiliense desert grassland
摘要
Abstract
This study clarifies the relationships between soil enzymes and environmental factors that are closely related to the carbon,nitrogen,and phosphorus cycles in ecosystems during the restoration of desert grassland.We investigated a Seriphidium transiliense desert grassland in Manasi County,focusing on the effects of enclosure(8 years)on plant community characteristics,soil physicochemical properties,soil enzyme activity,and stoichiometric characteristics.Results show the following:1)Plant cover,density,underground biomass,and basic physical and chemical properties of soil exhibited no significant responses to enclosure(P＞0.05);2)Compared with the case in the grazing area,closure significantly decreased(solid-n-acetyl-β-d-glucosidase,S-NAG)and(solid-leucine aminopeptidase,S-LAP)(P＜0.05);however,it also increased the soil C∶N and C∶P activity ratios.NAG,soil pH,electrical conductivity(EC),and total phosphorus(TP)exhibited significant positive correlations(P＜0.01);LAP was positively correlated with EC(P＜0.01).N∶P enzyme activity was significantly negatively correlated with pH,EC,TP,and nitrate nitrogen(NO3-N)(P＜0.01)and positively correlated with soil organic carbon(SOC)(P＜0.01).3)Redundancy analysis showed that the main factors causing the change of soil enzyme activity and its stoichiometric ratio were alkali-hydrolyzed nitrogen(AN),EC,SOC,and soil total nitrogen(TN),with the influences of other environmental factors on soil enzyme activity and its stoichiometric ratio being relatively weak.Overall,this study provides a theoretical basis for exploring the nutrient cycling mechanism of long-term grazing in Seriphidium transiliense desert grassland and the restoration of grassland ecosystems.关键词
围栏封育/蒿类荒漠/酶化学计量比/环境因子/土壤酶活性/冗余分析/微生物Key words
fencing/Artemisia desert/enzyme stoichiometric ratio/environmental factors/soil enzyme activity/redundancy analysis/microorganism引用本文复制引用
吴悦,董乙强,周时杰,聂婷婷,姜安静,柳泽宇,郭亮..封育对伊犁绢蒿荒漠土壤酶活性及其化学计量特征的影响[J].草业科学,2025,42(8):1945-1958,14.基金项目
新疆维吾尔自治区自然科学基金项目(2020D01B29) （2020D01B29）
新疆农业大学研究生科研创新计划项目(XJAUGRI2023007) （XJAUGRI2023007）
