摘要
氮肥在农业生产中具有重要作用,但是随着氮肥施用量的增加和利用率的下降,逸出(或损失)到周围环境中的比例和数量不断增加,过量的氮肥已成为主要环境污染源之一,对包括土壤和水体在内的生态系统造成很大影响。主要分析了我国氮肥利用现状及其对生态系统造成的影响,同时指出了提高氮肥利用率的措施。
Nitrogen fertilizer played an important role in agriculture. However, with the increasing of quantity of nitrogen fertilization and the decreasing of the nitrogen use efficiency, the proportion and quantity of nitrogen fertilization escaped to surrounding environment were continuously increasing. Excessive nitrogenous fertilizer had been one of the main pollution sources that had great influence on ecosystem including soil and water. The status and effects of nitrogen application were analyzed , and the countermeasures increasing the nitrogen use efficiency were put forward.
出处
《河北农业科学》
2009年第3期60-63,共4页
Journal of Hebei Agricultural Sciences
基金
唐山市科技局重点攻关项目(04124801C)
关键词
生态系统
氮肥利用率
氮肥
环境污染
解决措施
Ecosystem
Nitrogen use efficiency
Nitrogen fertilizer
Environment pollution
Countermeasures
