包裹型缓释肥料氮素释放的数学模拟  

Mathematical Model for Nitrogen Release from Coated Slow-release Fertilizers

作　　者：陈可可[1] 张保林[1] 侯翠红[1] 王杰[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450002

出　　处：《安徽农业科学》2011年第5期2729-2730,2733,共3页Journal of Anhui Agricultural Sciences

摘　　要：包裹型缓释肥料氮素释放过程可以分为稳定阶段和衰退阶段,利用多孔介质中物质的扩散传递理论得出包裹型缓释肥料氮素释放的分段数学模拟方程和包裹层内尿素完全溶解时刻t′值。经过自制包裹型缓释肥料中的氮素在25℃水中的溶出试验证明,该数学模型能够较好地估算包裹型缓释肥料养分释放规律,可用于系统研究包裹型缓释肥料的养分释放特性,其对包裹型缓释肥料的研制和应用具有重要的指导作用。The N release process from coated slow-release fertilizers was divided into two stages： stabilization period and decline stage.The segment mathematical simulation equation was created by using diffusion and transmission theory in porous medium.The t′ value was obtained when urea in integument was dissolved completely.Based on the experiment of nitrogen dissolving out of 25 ℃ water,this mathematical model can evaluated the nutrient release rule of coated slow-release fertilizers,which was beneficial to the systematical study of nutrient release features,what＇s more,it was of great guidance for the development and application of coated slow-release fertilizers.

关 键 词：包裹肥料 数学模型 养分释放 

分 类 号：S143.39[农业科学—肥料学]