北京师范大学学报（自然科学版）2018，Vol.54Issue(2)：254-260,7.DOI:10.16360/j.cnki.jbnuns.2018.02.017
青海湖流域高原鼠兔扰动对土壤养分及微生物量碳氮的影响
Effects of plateau pika's disturbance on soil nutrients, microbial biomass C and N of different land surface types in Qinghai Lake watershed
摘要
Abstract
To investigate effects of plateau pika,s disturbance on soil nutrients (total N,available N, total P,available P,total K,and available K) and microbial biomass carbon and nitrogen in alpine meadow, field fixed-point experiments were carried out in the Qinghai Lake watershed. Vertical and horizontal differences in soil nutrients of different land surface types (grassland, new mounds, old mounds and bare land) were analyzed. It was found that disturbance of plateau pika increased contents of soil nutrients and available nutrients in a short time. Total N,available N,total P,available P,total K and available K in different soil layers were significantly different (P＜0.01). Total N, available N,available P,total K and available K in different land surface types were also different (P＜0.05), no significant difference was found for total P among different land surface types (P＞0.05). Plateau pika's disturbances increased soil microbial C and N and made them more evenly distributed in a short time. However, their contents will decrease rapidly with time, The differences in soil microbial C and N contents in different soil layers were found to be statistically significant (P＜0.01). There were differences in soil microbial C contents among different land surface types (P＜0.05),but there was no difference in soil microbial N contents (P＞0.05),Disturbance of plateau pika was found to mainly affect soil nutrient composition by varying soil bulk density, soil powder content, aboveground biomass and soil gravimetric water content. Plateau pika's disturbances could improve soil quality very quickly, soil quality then decreased gradually with loss of various nutrient elements. This study would help to understand how plateau pika's disturbance influences soil quality of alpine meadow, and provide a key reference for management and protection of grassland in Qinghai Lake watershed.关键词
高原鼠兔/地表类型/土壤养分/土壤微生物量碳氮/青海湖流域Key words
plateau pika/land surface type/soil nutrients/soil microbial biomass C and N/Qinghai Lake watershed分类
农业科技引用本文复制引用
刘文玲,马育军,吴艺楠,李小雁..青海湖流域高原鼠兔扰动对土壤养分及微生物量碳氮的影响[J].北京师范大学学报（自然科学版）,2018,54(2):254-260,7.基金项目
国家自然科学基金资助项目(41771026,41730854) （41771026,41730854）
长江学者和创新团队发展计划资助项目(IRT_15R06) （IRT_15R06）
地表过程与资源生态国家重点实验室资助项目(2017-FX-04) （2017-FX-04）
