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运用五元二次正交旋转组合设计研究栽培因素对甘蓝型杂交油菜群体干物重、经济系数、收获指数的影响 ,其顺序为密度 >播期 >施钾量 >施磷量 >施氮量 ,其中播期和密度对群体干物重的影响达极显著水平。播期与施氮量、施磷量与施钾量的交互作用对群体干物重的影响达显著水平。五因素对经济系数、收获指数不产生显著影响 ,不同产量水平下 ,群体干物重间存在极显著差异 ,而经济系数间收获指数间无显著差异性。群体产量与群体干物重间呈极显著正相关 ,群体干物重与经济系数、收获指数间和群体产量与经济系数、收获指数间均无显著相关性 ,经济系数与收获指数间呈极显著正相关。因此 ,要提高群体产量 ,必须首先提高整个群体的干物重。
The effects of different planting factors on the dry matter weight, economic coefficient and harvest index of rapeseed (Brassica napus L.) hybrid rape were studied using quinary quadratic orthogonal rotation combination design. The order was density> sowing date> potassium application rate> phosphorus application rate> nitrogen application rate, The effects of sowing date and density on population dry weight reached a significant level. The effects of sowing date, nitrogen application rate, phosphorus application rate and K application rate on dry matter weight of the population reached a significant level. The five factors have no significant effect on the economic coefficient and harvest index. Under different yield levels, there is a significant difference between the dry weight of the population, but there is no significant difference between the economic index and the harvest index. There was a significant positive correlation between population dry weight and population dry weight. There was no significant correlation between population dry weight and economic coefficient, harvest index, population yield and economic index, harvest index, economic index and harvest index were significantly and positively correlated . Therefore, in order to increase group output, it is necessary to first increase the dry weight of the entire group.