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Erschienen in:
2010 | OriginalPaper | Buchkapitel
Transformation of Nitrogen and Its Effects on Metal Elements by Coated Urea Application in Soils from South China
verfasst von : Zhaohui Jianga, Qingru Zeng, Hejie Pi, Bohan Liao, Xiaoyou Feng, Yulin Sun
Erschienen in: Molecular Environmental Soil Science at the Interfaces in the Earth’s Critical Zone
Verlag: Springer Berlin Heidelberg
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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 NH
4
+
and NO
3
−
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.