日本包膜缓释肥料养分释放及微结构研究  

Characteristics and Mechanism of Nutrient Release of Coated Slow-release Urea of Japan

作　　者：邹洪涛[1] 韩艳玉[1] 张玉玲[1] 虞娜[1] 新田郎 曹敏建[1] 张玉龙[1] 

机构地区：[1]沈阳农业大学农业部东北土壤与环境重点开放实验室,辽宁沈阳110161 [2]日本富山县农业研究所

出　　处：《土壤通报》2011年第4期926-930,共5页Chinese Journal of Soil Science

基　　金：国家自然科学基金(31000936);教育部重点项目(209032);中国博士后科学基金(20090450158);日本海外研修员项目资助

摘　　要：采用恒温水培试验,研究了日本生产的五种包膜肥料(LP40、LPS40、SC60、LPSS和LPSS100)氮素释放特性,用一级反应动力学方程进行拟合,并用扫描电镜观察了包膜肥料水培前后膜的微观结构。结果表明,包膜肥料的膜材料不同,氮素释放量也不同;包膜肥料的氮素释放率随着时间的延长而增加;这五种包膜肥料的氮素释放特征均可用一级反应动力学方程来描述,氮素释放速率常数与氮素释放率成正比,与氮素溶出的半时值成反比;扫描电镜的图像分析结果显示,水培后LPSS、SC60的膜外表面完整性要好于LP40,LPSS的膜剖面结构很紧实,阻水性能好。The nitrogen releasing characteristics from five kinds of coated slow-release urea of Japan（LP40,LPS40,SC60,LPSS and LPSS100） were studied through purified water culture under the same temperature,which is fitted with the first-order reaction model,and microstructure of membranes of coated slow-released urea before and after purified water culture were characterized by a scanning electron microscopy（SEM）.Results showed that nitrogen releasing rate of different kinds of coated slow-released urea was different.The rate of nitrogen solubility increased with the increase of incubation time.The nitrogen releasing characteristics could be described by the first-order reaction model.The nitrogen releasing rate constant in proportion with nitrogen releasing rate and inverse the days of the 50 percent of nitrogen releasing rate.The outer surface integrity of LPSS,SC60 better than LP40,and the water resistance of the membrane of LPSS was much better than others because of the compactness of the cross section membrane analyzed by SEM.

关 键 词：包膜肥料 养分释放特性 微观结构 

分 类 号：S143.1[农业科学—肥料学]