北方稻田生态系统养分平衡研究  

Nutrient balance in rice field ecosystem of northern China.

作　　者：罗良国[1] 闻大中[1] 沈善敏[1] 

机构地区：[1]中国科学院沈阳应用生态研究所

出　　处：《应用生态学报》1999年第3期301-304,共4页Chinese Journal of Applied Ecology

基　　金：中国科学院"八五"重点项目

摘　　要：１９９４～１９９６年研究了５种不同模式水稻田生态系统养分平衡及养分效率．结果表明，不同模式的水稻田生态系统中，Ｎ输入输出基本相抵，处于平衡状态；Ｋ输入输出稍有盈余，唯Ｐ施用量较输出高１倍，使土壤中Ｐ有所积累．通过合理水肥调控措施，使水稻单产有所提高。The nutrient balance and efficiency in five rice field ecosystems were studied at the lower reach plain of Liaohe River from 1994～1996. The results show that the N input and output in various patterns of rice ecosystem were basically balance, little more for K input than output, and P input as twice much as its output. With rational management measures of fertilization and water saving, the rice yield would be increased, and the nutrient efficiency would be enhanced to some extent.

关 键 词：单作水稻 稻田生态系统 养分平衡 养分效率 

分 类 号：S511.01[农业科学—作物学]