Transformation of Nitrogen and Its Effects on Metal Elements by Coated Urea Application in Soils from South China

摘要：

This paper studied the transformation of N and its effects on metal elements under supply of two types of urea. The results showed that hydrolysis rate of coated urea was lower than common urea. After 48 days incubation, the concentrations of NH4+ and NO3- in soil were greater by coated urea application than that by common urea application. Urea application decreased in the first week, and then increased the concentrations of Al, Mn and Ca while the effect of treatment on soil pH followed the opposite pattern. In pH 4～8, concentrations of these elements were negatively correlated with soil pH.

关键词： Coated urea pH Peak value Metal element

作者: Zhaohui Jiang Qingru Zeng Hejie Pi Bohan Liao Xiaoyou Feng Yulin Sun

作者单位: College of Resources and Environment,Hunan Agricultural University,Changsha 410128,China College of College of Resources and Environment,Hunan Agricultural University,Changsha 410128,China

会议类型: 国际会议

会议名称: The International Symposium of Molecular Environmental Soil Science at the Interfaces in the Earths Critical Zone(地球关键区界面反应：分子水平环境土壤科学国际会议)

会议地点: 杭州

会议语种:英文

页码: 137-140

在线出版日期: 2009-10-10（万方平台首次上网日期，不代表论文的发表时间）