摘要
选取青藏高原念青唐古拉山地处不同海拔的高寒沼泽土壤作为研究对象,测定土壤理化指标以及土壤酚氧化酶、脲酶、过氧化物酶、蛋白酶、L-天冬酰胺酶和碱性磷酸酶活性,提取土壤微生物磷脂脂肪酸量,得到土壤微生物生物量,研究沼泽土壤微生物群落和土壤酶活性随着海拔增加的变化特征,探讨土壤微生物群落和土壤酶活性与环境因子之间的关系。结果表明,高寒沼泽土壤理化指标、土壤酶活性和土壤微生物量都随海拔增加而明显减小。相关分析与典范对应分析结果显示,年平均气温与大多数土壤物理化学指标、土壤酶活性和土壤微生物量显著正相关。年平均气温是影响念青唐古拉山地区高寒沼泽生态系统土壤微生物群落结构和土壤酶活性变化的重要因子。
As a special type of ecological system, the wetlands are very sensitive to global climate change and response to it through special energy and water exchange system and carbon cycles. The microbial community structure in the soils in the marshes at 4 heights above sea level in Nyaiqentanglha Mountains was analyzed by phospholipid fatty acid method and activities of 6 kinds of enzymes （phenol oxidase, urease, peroxidase, protease, L-asparaginase and alkaline phosphatase） was tested in this study. The results showed that the key factor which affected the soil microbial community structure and enzyme activities was mean annual temperature. The indexes of soil physical and chemical properties, soil enzyme activities and soil microbial biomass all significantly decreased with the height above sea level increasing.
出处
《湿地科学》
CSCD
北大核心
2014年第3期340-348,共9页
Wetland Science
基金
中国科学院重要方向性项目(KZCX2-EW-112)
国家自然科学基金项目(41072107)资助
关键词
土壤微生物
土壤酶活性
气温
高寒沼泽
青藏高原
soil microorganism
soil enzyme activity
air temperature
alpine marsh
Tibet Plateau
