摘要
探讨了两种有机无机复合物包膜缓释尿素(BG、BF)在不同温度下养分释放特性。研究结果表明,包膜缓释尿素氮素释放率,随着培养温度的升高而增大;氮素释放特征可以用一级反应动力学方程描述,氮素释放速率常数,随着温度升高而增大。其机理为包膜缓释尿素在氮素释放过程中活化能与养分释放速率密切相关,活化能越低,养分释放速率常数越大,养分释放加快,这主要与包膜材料的性质有关,是影响养分释放快慢的内因。
The nitrogen releasing characteristics from two kinds of inorganic and organic compound coated slow-release urea （BG andBF） were discussed in different incubated temperatures. Results showed that nitrogen releasing rate of coated slow-release urea increased with temperature. The nitrogen releasing characteristics could be described by the kinetics equation Nt=No[1-exp（-kt）], and the releasing velocity constant k increased with temperature. The reason was that there was a close relationship between activation energy and nitrogen releasing velocity in the process of nitrogen release from coated slow-release ureas due to the coated material＇s properties.
出处
《土壤通报》
CAS
CSCD
北大核心
2009年第2期321-324,共4页
Chinese Journal of Soil Science
基金
辽宁省"十一五"重大科技攻关课题(2006215005)
辽宁省教育厅科学研究计划A类(2004F081)
沈阳农业大学青年基金教育部重点项目:博士后项目资助
关键词
温度
包膜缓释尿素
养分释放特性
Temperature
Coated slow-release urea
Nitrogen release characteristics
