缓控释肥料氮素释放的动力学  

Kinetics of Slow Controlled Nitrogen Release from Fertilizer

作　　者：陈可可[1] 张保林[1] 侯翠红[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450002

出　　处：《化学反应工程与工艺》2012年第4期351-357,共7页Chemical Reaction Engineering and Technology

基　　金：国家"十一五"科技支撑计划课题(2007BAE58B07)

摘　　要：利用水浸提法研究了国内外6种缓控释肥料在不同温度下的氮素释放特性,并研究了其氮素释放过程的动力学。不同温度下缓控释肥料的氮素累积释放率表明,供试的6种肥料在静水中的氮素累积释放率均随着温度的升高而增大,且温度越高,氮素累积释放率增加的越快。引入一级反应动力学方程,氮素释放速率常数k和氮素释放过程的活化能Ea结果表明,在6种供试肥料中,氮素释放过程对温度最敏感的是缓溶复混肥料(zdLuxe-02),受温度影响最小的为微晶聚合硫包衣尿素(hf-01)。The nitrogen release characteristics of 6 slow-controllod release fertilizers produced by different technologies were studied using water extraction method at different temperature. The results indicated that the cumulative release amount of nitrogen of the 6 slow-controlled release fertilizers increased with the increase of temperature, the higher the temperature, the bigger the cumulative release rate of nitrogen. A first-order kinetic rate expression was introduced. The results of kinetics showed that, with the increase of temperature, the rate constant of nitrogen release （k） increased and the activation energy of nitrogen release （Ea） decreased. Among all the 6 fertilizers, slow-dissolving compound fertilizers （zdLuxe-02） was the most sensitive one to the temperature, whereas Microcrystal-poly-sulfur coated urea （hf-01） was the least sensitive one to the temperature.

关 键 词：温度 缓控释肥料 动力学 

分 类 号：TQ444[化学工程—化学肥料工业]