种植密度对稻茬直播油菜氮素吸收与利用的影响  

Effect of density on nitrogen absorption and utilization of direct sowing rapeseed in paddy rice field

作　　者：唐瑶[1] 冷锁虎[1] 左青松[1] 葛云龙[1] 晋晨[1] 

机构地区：[1]扬州大学农学院,江苏扬州225009

出　　处：《广东农业科学》2012年第17期14-16,共3页Guangdong Agricultural Sciences

基　　金：国家科技支撑计划项目(2010BAD01B01);江苏省农机三项工程项目(NJ2009-42);江苏省农业三项工程项目(sx[2011]106)

摘　　要：以苏油211为材料,测定不同密度水平下油菜初花期和成熟期各器官干重和氮素含量,研究了密度对稻茬直播油菜氮素吸收与利用的影响。结果表明:氮素吸收量和利用率与密度均呈二次曲线关系,最大氮素吸收量和最大氮素利用率的密度分别为35.1万、27.3万株/hm2。在本研究条件下,密度为33.7万株/hm2能较好地协调油菜对氮素吸收和利用的关系并取得最高的籽粒产量。The effects of density on nitrogen absorption and utilization of rapeseed were studied through measuring dry weight and nitrogen content in various organ at beginning flower and maturity stage.The results showed that nitrogen absorption and utilization and density were both tested quadratic relationship;the density of maximum nitrogen absorption and utilization were 35.1×104 plants/hm2 and 27.3×104 plants/hm2,respectively.In this study,when density was 33.7×104 plants/hm2,it could coordinate the relationship between nitrogen absorption and utilization and achieved the highest seed yield.

关 键 词：油菜 密度 氮素吸收 氮素利用率 

分 类 号：S565.4[农业科学—作物学]