草业科学2012，Vol.29Issue(2)：189-197,9.
甘肃玛曲高寒草甸土壤微生物季节变化特性的研究
Seasonal dynamics of soil microbes and their relationship with soil physicochemical factors in alpine meadow in Maqu of Gansu
摘要
Abstract
The seasonal dynamics of different soil microbes and their relationships with soil physicochemical factors were studied. The soil samples were taken from six sampling points of alpine meadow located in Maqu of Gansu. The results showed that soil bacteria occupied absolute advantage among soil microbes. Seasonal variation had a great influence on soil microbial activities. Soil microbes and soil physicochemical factors had close relationship. The peak value of bacteria quantity in soil appeared in April. Actinomycetes number decreased gradually from spring to autumn, while activities of fungi were stable. Ammonifier and nitrobacteria had more activities in April and October; denitrifier had more in July; and amounts of aerobic nitrogen-fixing bacteria and aerobic cellulose decomposer were more in January. The results of main com- position analysis of soil microbial quantity showed that aerobic nitrogen-fixing bacteria and aerobic cellulose decomposer offered more contribution to soil fertility. The results of canonical correlation analysis showed that there was only one group of canonical variable correlation, which was caused by bacteria, fungi, ammonifier, denitrifier and soil pH value, conductivity, nitrate nitrogen, ammoniacal nitrogen and total phosphorus.关键词
高寒草甸/土壤微生物/季节动态/土壤理化因子Key words
alpine meadow/soil microbes/seasonal dynamic/soil physicochemical factors分类
农业科技引用本文复制引用
李君锋,杨建文,杨婷婷,达文燕,胡磊,景彩虹,姚健,牛世全..甘肃玛曲高寒草甸土壤微生物季节变化特性的研究[J].草业科学,2012,29(2):189-197,9.基金项目
国家自然科学基金项目 （）
2009年度人事部留学人员科技活动择优资助项目 （）
