秸秆还田和氮肥施用对夏玉米氮肥利用率的影响  

EFFECTS OF APPLICATION OF N-FERTILIZER AND CROP RESIDUES AS MANURE ON SUMMER MAIZE N RECOVERY RATE

作　　者：霍竹[1] 付晋锋[2] 王璞[2] 

机构地区：[1]中国科学院地理科学与资源研究所 [2]中国农业大学,北京100094

出　　处：《土壤》2005年第2期202-204,共3页Soils

基　　金：国家"十五"科技攻关项目(编号:2001BA508B02-06);国家杰出青年基金项目(编号:40025106)资助。

摘　　要：本文研究了秸秆还田和N肥施用对夏玉米N肥利用率的影响。结果表明,秸秆还田和N肥施用都有助于夏玉米N肥利用率的提高,尤其是优化施N大大提高了夏玉米的N素利用率,并且提出了在京郊地区适宜推广的一种可行的培肥地力、增加产量的模式。In this paper, effects of application of N fertilizer and crop residues as manure on NRR (N recovery rate) of summer maize were studied. The results showed as follows: the application of both straw and N-fertilizer improved NRR of summer maize to a certain degree. Especially optimized N-fertilizer application raised the NRR of summer maize by 3.12~7.39 kg/hm2. Analysis of crop yield, net economic income and environmental impact, “incorporation of crop residues into the soil plus optimized N-fertilization” is the best model in our experiment and is worth popularizing in the suburbs of Beijing.

关 键 词：秸秆还田 氮肥用量 夏玉米 氮肥利用率 

分 类 号：S513[农业科学—作物学] O62[理学—有机化学]