| 用温度变换日数法预测包膜尿素氮素的溶出率 |
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| 引用本文： | 张玉龙,党秀丽,卫树银,朱利平,ZHU Li-ping.用温度变换日数法预测包膜尿素氮素的溶出率[J].土壤通报,2008,39(3). |
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| 作者姓名： | 张玉龙 党秀丽 卫树银 朱利平 ZHU Li-ping |
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| 作者单位： | 1. 沈阳农业大学土地与环境学院,辽宁省农业资源与环境重点实验室,辽宁,沈阳,110161
2. 包头市农垦集团有限责任公司,内蒙古,包头,014060 |
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| 基金项目： | 日本神奈川县政府资助研修项目，辽宁省重大农业攻关项目，沈阳农业大学青年教师科研基金 |
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| 摘 要： | 通过不同温度培养试验方法,根据反应速度理论法求得了包膜尿素(LP30)氮素的溶出特性值,并采用基于反应速度理论的温度变换日数法预测了包膜尿素(LP30)在自然土壤温度条件下氮素的溶出率。研究表明:包膜尿素(LP30)氮素溶出符合一级化学反应(Nt=N01-exp(-kt)]);溶出速率常数(k)具有温度依存性:在10℃～25℃范围内,速率常数(k)在0.0081～0.0425之间,反应活化能(Ea)为75733J mol-1;基于反应速率理论的温度变换日数法能够应用并预测自然温度条件下包膜尿素氮素的溶出率。
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| 关 键 词： | 反应速度理论 温度变换日数法 包膜尿素 溶出特性 |
Prediction on the Dissolving Rate of Nitrogen from Coated Urea by Days of Temperature Switch |
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| ZHANG Yu-ling,ZHANG Yu-long,DANG Xiu-li,WEI Shu-yin,ZHU Li-ping.Prediction on the Dissolving Rate of Nitrogen from Coated Urea by Days of Temperature Switch[J].Chinese Journal of Soil Science,2008,39(3). |
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| Authors: | ZHANG Yu-ling ZHANG Yu-long DANG Xiu-li WEI Shu-yin ZHU Li-ping |
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| Abstract: | The nitrogen dissolving characteristic value of a coated urea(LP30)was obtained based on reaction rate theory with different temperature culture experiments.The nitrogen dissolving rate from the coated urea(LP30)under natureal soil temperature was also predicted by days of temperature switch based on reaction rate theory.The results showed that the nitrogen dissolving of the coated urea(LP30)accorded with the first-order reaction model(Nt=N01-exp(-kt)]).Dissolving rate constant(k)had temperature dependence.At 10℃-25℃ the variation range of dissolving rate constants was 0.0081-0.0425 and the reaction activation energy was 75733J mol-1.The days of temperature switch method based on reaction rate theory could predict the dissolving rate of the coated urea at natural soil temperature. |
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| Keywords: | Reaction rate theory Days of temperature switch(DTS) Coated Urea Dissolving character |
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