高原鼢鼠(Eospalax baileyi)鼠丘土壤化学计量比和酶活性动态变化  

Dynamics of Soil Stoichiometric Ratios and Enzyme Activities in Plateau Zokor(Eospalax baileyi)Mounds

作　　者：王文碧 刘梦瑶 欧克杰 郝彪彪 龚俊强 苏军虎[1,2,3] WANG Wen-bi;LIU Meng-yao;OU Ke-jie;HAO Biao-biao;GONG Jun-qiang;SU Jun-hu(School of Grassland,Gansu Agricultural University/Key Laboratory of Grassland Ecosystem,Ministry of Education of Gansu Province/Gansu Provincial Grassland Engineering Laboratory/Center for Sustainable Development of Grassland Animal Husbandry of China and the United States,Lanzhou,Gansu Province 730070,China;Center for Grassland Biodiversity Research,Gansu Agricultural University-Mercy Univer-sity,Lanzhou,Gansu Province 730070,China;Gansu Qilianshan Grassland Ecosystem Observation and Research Station,Wuwei,Gansu Province 733200,China)

机构地区：[1]甘肃农业大学草业学院/草业生态系统教育部重点实验室/甘肃省草业工程实验室/中美草地畜牧业可持续发展研究中心,甘肃兰州730070 [2]甘肃农业大学-新西兰梅西大学草地生物多样性研究中心,甘肃兰州730070 [3]甘肃祁连山草原生态系统观测研究站,甘肃武威733200

出　　处：《草地学报》2025年第4期1127-1136,共10页Acta Agrestia Sinica

基　　金：甘肃省重点研发生态文明建设专项(24YFFA058);中央引导地方科技发展基金项目(23ZYQH0298);国家自然科学基金项目(32272566)资助。

摘　　要：为明确高原鼢鼠(Eospalax baileyi)鼠丘土壤化学计量比和酶活性动态变化特征,本研究基于时空互代法,在青藏高原东北缘的高寒草甸区选择不同年限的鼠丘,探究其恢复过程中植被、土壤化学计量比和酶活性变化规律。结果发现:与未受干扰样地相比,1年鼠丘的植被丰富度、地上和地下植物生物量显著降低(P<0.05),但随鼠丘恢复年限增加呈上升趋势;与1年鼠丘相比,多年鼠丘的土壤C∶P,N∶P以及脲酶、淀粉酶和纤维素酶活性显著增加(P<0.05),而土壤C∶N、蔗糖酶、硝酸还原酶和亚硝酸还原酶活性无显著变化;鼠丘恢复年限解释了24.4%的土壤化学计量比和76.1%的酶活性变异。鼠丘恢复过程中土壤容重、有机碳含量、全氮含量、地上和地下植物生物量的增加,提高了土壤酶活性和碳氮含量。研究增进了高原鼢鼠对草地生态系统影响的认识,为鼠害型退化高寒草地的修复提供了参考。In order to characterize the dynamic changes of soil stoichiometry ratio and enzyme activity in plateau zokors(Eospalax baileyi)mounds,based on the spatio-temporal intergenerational method,in this study we selected zokor mounds with different years of experience in alpine meadows in the northeastern edge of the Tibetan Plateau to investigate the changes in the patterns of vegetation,soil stoichiometry ratio,and enzyme activity in the process of their restoration.The results showed that the vegetation richness,above-ground and below-ground vegetation biomass of the zokor mound in one year were significantly lower than those of undisturbed control plots(P<0.05),but increased with the increase of zokor mound restoration years.Soil C∶P,N∶P,urease,amylase and cellulase activities were significantly increased(P<0.05),while soil C∶N,sucrase,nitrate reductase and nitrite reductase activities were not significantly changed in multi-year zokor mounds compared with one-year zokor mounds.The zokor mounds restoration years explained 24.4%of the soil stoichiometric ratio and 76.1%of the enzyme activity variation.The increase of soil bulk density,organic carbon,total nitrogen,aboveground and underground vegetation biomass increased soil enzyme activity and carbon and nitrogen content during the restoration of the zokor mounds.The study enhanced the understanding of the influence of plateau zokor on grassland ecosystem,and provided a reference for the restoration of rodentdamaged degraded alpine grassland.

关 键 词：高寒草甸 鼢鼠鼠丘 恢复年限 化学计量比 土壤酶活性 

分 类 号：S812.2[农业科学—草业科学]