摘要
摘要本文研究了尿素在土壤中转化时形成氨挥发损失的一般规律,即不同的施用量、季节、土壤pH值、土壤水分状况和不同施肥方法均会在氨挥发损失方面表现出明显的差异。还探讨了利用工业副产品磷石膏(作为添加剂物质)与尿素结合后对降低尿素施入土壤后引起氨挥发损失的可能性,结果表明其作用是十分显著的。最后对尿素中添加磷石膏工艺方法进行了研究,并对磷石膏降低尿素氨挥发损失的原因作了分析。
ABSTRACT This paper studied the ammonium volatilization phenomenon of urea in the soil. It was found that: rate of application; season of application; soil pH value; soil water content and method of fertilizer application, all these factors may induce different amount of ammonium volatilization losses of urea in the soil. The main purpose of our study was the function of industrial by-product phosphorus-gypsum used as urea fertilizer additive to the suppressing effect of urea’s ammonium volatilization in soil. The result shows; the suppressing effect of ammonium volatilization of urea in soil by phospho-gypsum was satisfactory. This report also focused on the technical methodology of addition the gypsum to urea. At sametime, the theoretical analysis of the mechanism of the suppressing effect of urea’s ommonium volatilization was also discussed.
出处
《上海交通大学学报（农业科学版）》
1990年第4期271-279,共9页
Journal of Shanghai Jiaotong University(Agricultural Science)
关键词
磷石膏
氨挥发
熔融
包膜
挤压造粒
铵核
肥料长效性
Phospho-Gypsum
Ammonium volatilization
Fusion
Coating
Pressing granulation
Ammonium nucleus
Property of fertilizer’s slow-release ability
