桐油包膜复合肥料的包膜形态及缓释性能研究  

Study of Envelope Form and Slow-Release Properties of Tung Oil-Coated Compound Fertilizers

作　　者：李萍[1] 唐辉[1] 尤坚萍[1] 

机构地区：[1]昆明理工大学生物与化学工程学院,650224

出　　处：《化肥工业》2005年第3期17-19,共3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(2001B009M)

摘　　要：以桐油为主要包膜材料对复合肥料进行了包膜处理,用扫描电镜(SEM)研究了包膜的表面和剖面形貌,采用重量法和电导率法测定了包膜复合肥料固形物溶出率并对其缓释性能进行了探讨。实验结果表明,桐油在复合肥料颗粒表面经热固化后形成连续和附着良好的包膜层,包膜率为10.1%的桐油包膜复合肥料的80%养分释放时间可达到27d。Tung oil is used as the main coating material for enveloping compound fertilizers, the surface and profile of the envelope are examined by the SEM, the dissolvability of solids from the coated fertilizers is determined by the conductivity method and the gravimetric method, and an inquiry is made into the slow-release properties. The experimental results show that tung oil on the surface of the compound fertilizer granules after heat solidification forms a continuous envelope with good adherence, and tung oil-coated compound fertilizers with a coating rate of 10.1% have 80% of their nutrients released in 27 days.

关 键 词：桐油 包膜材料 复合肥料 包膜形态 缓释性能 重量法 电导率法 

分 类 号：TQ444[化学工程—化学肥料工业]