关键词: 油菜[49EJ, 49EK], 早熟品种[49DA], 栽培特性, 密氮配置参数

Abstract: The cultivated characters and the parameters of nitrogen and density for rape early varieties were studied by combining the regression and split design. The result shows that among the yield components, the seed number per pod has the greatest direct contribution to yield, and the greatest indirect contribution belongs to the thousand kernel weight through pod seeds. The pod seeds and the thousand kernel weight have a coordinate effect. For high seed yield, more attention should be paid to enhanceing the pod seeds and the thousand kernel weight on the condition of a higher effective pods per mu, 14000-15300 plants and 8.4-9.0kg pure nitrogen per mu are the parameters for early varieties. Within such limits, the low suitable for conventional seed, the high for hybrid seed. The difference and cultivation techniques are given for MY-6, CY-11 and MZ-905.

Key words: BIRD RAPE, EARLY MATURING VARIETIES, CULTIVATED CHARACTER, PARAMETERS OF DENSITY AND NITROGEN