氮肥利用率概念与^(15)N示踪测定方法研究进展

Review the Concept of Fertilizer Nitrogen Recovery Rate and Determination by ～(15)N Tracer

中国粮食作物氮肥利用率平均为35%左右,与发达国家50%的氮肥利用率相比,低15个百分点,针对这一问题,介绍了15N示踪法测定氮肥利用率的方法及概念,分析评价了15N示踪法测定氮肥利用率结果,提出了这种测定方法可能存在的一些问题,以及氮肥利用率测定方法进一步改进的建议。

The average apparent recovery efficiency of applied nitrogen （REN） was low in Chinese food crops （35%） compare with developed countries （50%）. The article introduced the concept and measurement methods of REN by 15N tracer. The REN results from document search had been analyzed and evaluated. Some problems had been put forward in REN calculation. The way to improve REN calculation had been recommended.