The Soil Microbial Biomass at Different Flooding Gradient in the Riparian Wetland of Three Gorges Reservoir Area
Soil microbial biomass is an important part of soil organic matter and a characterization of soil quality indicators. In this study, we collected soil samples from two typical branches of the Three-Gorges Reservoir area of the Yangtse River main stream, Lanling River and Tongzhuang River, selected three flooding gradients: permanently flooding site (below 145m), seasonal flooding site (145-175m), and never flooding site (above 175m). The results showed that soil microbial biomass carbon (MBC) and nitrogen (MBN) gradually decreased with increasing flooding gradient, and that MBC/OC and MBN/TN tended to increase from permanently flooding site to seasonal flooding site but slightly decreased at never flooding site. There was a positive relationship between OC and TN. MBC showed a positive relationship with decreasing flooding gradient, indicating the soil quality of never flooding sites were relatively higher than those under long-term and short-term flooding sites.
Soil microbial biomass C, N MBC/OC MBN/TN Flooding gradients
Jia Yan Mei Jia Guo Mei Cao Lei Yu Ji Xin Liao Chang
College of Chemistry & Life Science Three Gorges University Yichang 443002, China
国际会议
哈尔滨
英文
286-289
2012-06-16（万方平台首次上网日期，不代表论文的发表时间）