摘要
基于目前对氮肥的环境效应与经济效益的关注,介绍了常用的氮肥效应参数;明确了差减法计算氮肥利用率中,无氮肥作物地上部分吸收氮素量(U0)的概念;总结了差减法计算氮肥利用率变异大的原因;分析解释了计算氮肥利用率计算公式的含义,并提出对计算公式的修正方法。
Based on current environmental effects of nitrogen and economic concerns,introduced were the parameters of nitrogen fertilizer effects.The concept of nitrogen absorption capacity of the parts of crops without nitrogen fertilizer（U0） was clarified.And the reasons for large variation in the subtraction calculation for the nitrogen utilization were summarized up.Analysis to explain the meaning of calculating formula for calculating N-fertilizer utilization rate was analyzed and explained,and reasonable modified method for calculating formula was introduced.
出处
《土壤通报》
CAS
CSCD
北大核心
2010年第5期1257-1261,共5页
Chinese Journal of Soil Science
基金
国家小麦产业技术德州综合实验站和"十一五"国家科技支撑计划(2008BADA4B04)资助
关键词
氮肥利用率
差减法
计算方法
Nitrogen utilization rate
Subtraction method
Calculation method
