氮肥运筹对直播水稻营养元素利用及产质量的影响  

The Impact of Nitrogen Application Way on Nutrition Utilization,Yield and Quality of Direct Seeding Rice

作　　者：陈家武[1] 卢以群[2] 单武雄[1] 

机构地区：[1]湖南生物机电职业技术学院环境工程系,湖南长沙410127 [2]中南大学研究生院隆平分院,湖南长沙410125

出　　处：《湖南农业科学》2014年第6期18-21,共4页Hunan Agricultural Sciences

基　　金：湖南省情与决策咨询研究项目(2014BZZ143)

摘　　要：参考测土配方施肥推荐量,在水稻施入氮肥总量相等的情况下,将氮肥分次施用,考察了氮肥运筹对水稻养分吸收利用、产质量及效益的影响。结果发现,氮肥分次施用可以提高肥料的利用率,氮肥利用率最高达38.6%;稻米产量有不同程度提高,最高增产达15.2%;稻米品质没有降低,达到粳米二级的标准;同时还可提高水稻种植效益,其中氮肥作基肥、分蘖肥和穗肥(一基二追)分三次施用的模式收益最高。This paper studies the application of the same total quantity of nitrogenous fertilizer to a rice field in phases, and studies the influence of nitrogenous fertilizer on rice yield and quality, as well as economic benefits. Results indicate that the application of nitrogenous fertilizer in phases improves the utilization rate （up to 38.6%） of fertilizer and the rice yield to different extents （up to 15.2%） . The rice quality does not drop to the Level II quality of polished round-grained rice, and the economic benefits derived from the rice plantation fiarther improve. The highest benefit is obtained via the one-base two-top pattern of fertilizer application, i.e., RMB 16979 yuan/hm2.

关 键 词：产量 氮肥 水稻 直播 品质 

分 类 号：S143.1[农业科学—肥料学]