The Release of Dissolved Organic Carbon in Paddy Soils under Contrasting Redox Status

摘要：

　　The objectives of this study were to examine the release of dissolved organic carbon (DOC) from soils under contrasting redox environments induced by various water content,and application of different ionic electron acceptors and redox materials.Under flooded conditions,the release of DOC in soils was significantly decreased by addition of FeC13 and enhanced by addition of NaNO3.Significant amount of DOC was produced only under constantly flooded conditions or alternate wetting and drying cycles.By contrast,the release of DOC when incubated aerobically was independent on soil water content.The addition of Na2SO4 at the concentration of 7 g kg-1 significantly inhibited DOC release.As soil redox potential gradually decreased with the addition of redox materials,more and more DOC were released at the end of incubation.

关键词： Dissolved organic carbon (DOC) Water content Oxidant/reductant Redox potential

作者: Jiajiang Lin Yan He Jiachun Shi Xingmei Liu Jianming Xu

作者单位: College of Environmental and Natural Resource Sciences,Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition,Zhejiang University,Hangzhou 310029,China

会议类型: 国际会议

会议名称: the 16th Meeting of the International Humic Substances Society (第十六届国际腐殖物质学会大会(IHSS 16))

会议地点: 杭州

会议语种:英文

页码: 174-176

在线出版日期: 2012-09-09（万方平台首次上网日期，不代表论文的发表时间）