The Soil Nitrogen at Different Flooding Gradient in the Riparian Zone of Three Gorges Reservoir Area
Nitrogen (N) in soil has great influence on soil quality and water quality, but the change in soil N at different flooding gradient has rarely been studied. The objective of this study was to determine the change in N in soil at different flooding gradient in the riparian zone of Three Gorges Reservoir Area. Permanently flooding site (below 145 m), seasonally flooding site (145-175 m), and never flooding of orchard garden (175-185 m, as a control) soil samples were collected from the Tongzhuang River and the Lanling River. The results showed that soil NH4+-N value increased gradually, whereas soil MBN, NO3--N decreased readily with flooding gradient. MBN/TN tended to be highest in seasonally flooding site. The results suggested that the highest accumulation of soil NH4+-N content, and lowest contents of MBN, and NO3-N was occurred under permanently flooding sites. Hydrology is a primary driving factor in the development of wetland soil N properties.
Riparian Different flooding gradient TN MBN NO3--N NH4+-N
Yu Ji Xin Jia Guo Mei Chen Fangqing Cao Lei Jia Yan Mei Liao Chang
College of Chemistry & Life Science Three Gorges University Yichang 443002, China
国际会议
哈尔滨
英文
314-317
2012-06-16（万方平台首次上网日期，不代表论文的发表时间）