桐油包膜尿素单个颗粒养分释放行为的研究  

Study of Nutrient Release from Single Granules of Tung Oil-Coated Urea

作　　者：唐辉[1] 尤坚萍[1] 张晓春[2] 王亚明[1] 戈振扬[2] 

机构地区：[1]云南昆明理工大学化学工程学院,650224 [2]云南昆明理工大学现代农业工程学院,650224

出　　处：《化肥工业》2009年第3期33-38,共6页Chemical Fertilizer Industry

基　　金：国家自然科学基金资助项目(20264002);云南省自然科学基金资助项目(2001B0009M)

摘　　要：桐油包膜尿素单个颗粒的养分表现出3个阶段释放规律，即时滞期、线性释放期和衰退释放期，养分释放具有由扩散机理支配的S形逐步释放特征。尽管粒径和包膜厚度存在差异，包膜尿素单个颗粒的养分释放不同。但是由30-90颗包膜尿素颗粒构成的6个包膜尿素颗粒群的养分释放行为却非常接近。Single granules of tung oil-coated urea show a pattern of three stages of nutrient release, viz. , the delay stage, linear release stage and decay period, and the nutrient release has the characteristics of an S-type gradual release controlled by the dispersion mechanism. In spite of the differences in particle size and coating thickness, the nutrient release of single granules of coated urea is also different, but the 6 groups of coated urea granules composed of 30 - 90 coated urea granules have nearly the same nutrient release behavior.

关 键 词：桐油包膜尿素 养分 释放行为 研究 

分 类 号：TQ534[化学工程—煤化学工程] S543.6[农业科学—作物学]