控释氮肥养分释放特征快速评价方法的研究  

Method of Evaluating Nutrient-Release Characteristics of Controlled-Release Nitrogen Fertilizer

作　　者：王为木[1] 史衍玺[2] 张民[2] 刘慧[3] 

机构地区：[1]河海大学现代农业工程系,江苏南京210098 [2]山东农业大学资源与环境学院,山东泰安271018 [3]南京大学环境学院,江苏南京210093

出　　处：《土壤通报》2005年第4期553-556,共4页Chinese Journal of Soil Science

基　　金：农业部948科技引进项目(971053);河海大学引进人才科研启动基金(2003402743)

摘　　要：本文研究了不同室内模拟试验条件下控释氮肥的养分释放特征。结果表明,60℃水浸泡培养法所反映控释氮肥的养分释放特征与标准参比方法(25℃水浸泡法)一致,其中养分累积释放曲线都呈一元二次抛物线型;不同释放阶段的平均释放速率成极显著的直线相关关系,相关系数达0.98。60℃水浸泡培养法步骤简单,所需时间短,可作为快速评价包膜控释氮肥养分释放特征的方法。The nutrient-release characteristics of controlled-release nitrogen fertilizers (CRNFs) under experimental conditions were studied by different simulated methods. The correlativity between nutrient accumulation of CRNFs and releasing time in 60 water-marinating method was described with parabola which indicated the consistency of nutrient-release characteristics of CRNFs in 60 water-marinating method and standard reference method (25 water-marinating method). The average nitrogen releasing rates of two simulated methods were both linearly and significantly correlative, with the correlation coefficient of 0.98. Compared to the standard reference method, the 60 water-marinating method was also more simply carried out and less time cost which could be used as the method of feasible evaluating the nitrogen-release characteristics of CRNFs.

关 键 词：控释氮肥 释放特征 快速评价方法 

分 类 号：S145.6[农业科学—肥料学]