油菜早熟品种栽培特性及密氮配置参数研究

STUDY ON THE CULTIVATED CHARACTERS AND THE PARAMETERS OF NITROGEN AND DENSITY FOR RAPE EARLY VANIETIES

本文采用回归设计和裂区设计相结合的方法，对油菜早熟品种栽培特性和密氮配置参数的研究表明：在产量构成因子中，每角粒数对产量的直接作用最大，千粒重通过每角粒数对产量的间接作用亦较大，且每角粒数和千粒重有一定的协同效应。栽培上应以较高的每亩有效角果数为基础，通过增加每角粒数提高千粒重来实现油菜增产。提出亩植1．40—1．53万株，施氮素8．4—9．0公斤为早熟品种的适宜密氮配置参数。在此范围内，常规种偏低限，杂交种偏高限。还比较了绵油6号、川油11和锦杂905之间的差异，明确栽培要点，可在实践中应用。

The cultivated charactets and the parameters of nitrogen anddensity for rape early varieties were studied by combining the regression andsplit design. The result shows that among the yield components, the seed numberper pod has the greatest direct contribution to yield, and the greatest indirectcontribution belongs to the thousand kernel weight througb pod seeds.The podseeds and the thousand kernel weight have a coordinate effect. Fot higb seedyield, more attention should be paid to enhanceing the pod seeds and the thousandkernel weight on the condition of a higher effective pods per mu, 1400-15300plants and 8. 4-9.0kg pure nitrogen per mu are the parameters for earlyvarieties. Within such limits, the low suitable for conventional seed,the highfor bybrid seed. The difference and cultiyation technigues are given for MY-6,CY-11 and MZ-905.