油菜撒播轻型栽培技术研究 Ⅱ.不同密度和施肥量对撒播油菜产量与农艺性状的影响  

Study on the Broadcast Cultivation Technique in Rape Ⅱ.Effects of different density and application amount on yield and agronomical character of Youyan 10

作　　者：侯剑[1] 

机构地区：[1]贵州省油菜研究所,贵州贵阳550008

出　　处：《贵州农业科学》2008年第2期25-27,共3页Guizhou Agricultural Sciences

基　　金：贵州省最高科学技术奖励基金自选项目"油菜撒播轻型栽培技术研究"

摘　　要：撒播油菜田间密度低于2.5万株/667m2时,较高的施氮水平有利于获得最大的生物群体产量和经济产量,田间密度在1.78万株/667m2左右,施氮量在11.5 kg/667m2的情况下,经济产量为216.8 kg/667m2,物资投入回报为1∶8.2,是最佳收益点。田间密度高于3万株/667m2后,较高与较低的施氮水平都不能获得最佳的生物群体产量和经济产量;随着田间密度的增大油菜单株产量有明显的下降,但密度的改变对油菜的株高、千粒重、含油率影响不大。随着施肥量的加大,油菜的株高、单株有效角、角粒数相应上升,单株产量有所增加,但油菜的千粒重下降,含油率下降明显。The results showed that the maximum biological and economic yield was gained under the density of 25 thousand plant/667m2 and higher N application amount,the optimum input and output ratio was 1∶8.2 under the density of 17.8 thousand plant/667m2 and 11.5 kg/667m2 of N application amount.The optimum biological and economic yield could not be gained under higher and lower N application amount when the density was over 30 thousand plant/667m2.Tie yield per plant obviously decreased with increase of the density but the density had little effect on plant height,1000-grain weight and oil content.The plant height,effective pods per plant,seeds per pod and yield per plant rises,and 1000-grain weight and oil content decreases with increase of N application amount.

关 键 词：撒播 油菜 密度 施肥量 干物重 经济产量 

分 类 号：S565.402[农业科学—作物学] S565.406.2