不同栽培因素对油菜群体干物重等的影响  

Affection of different cultivating factors on hybrid rape

作　　者：赵继献[1] 朱文秀[1] 王华[1] 

机构地区：[1]贵州省油料科学研究所,思南565109

出　　处：《山地农业生物学报》1999年第5期283-288,共6页Journal of Mountain Agriculture and Biology

摘　　要：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 sowing date, density, applied amount of N fertilizer, applied amount of P 2O 5, applied amount of K 2O on dry physical weight, coefficient of economic, harvest index of population of hybrid rape were studied. The results showed as follows: the sequence of role of five main cultivating factors on dry physical weight of population was density >sowing date >applied amount of K 2O >applied amount of P 2O 5 >applied amount of N fertilizer. The effects of density and sowing date on dry physical weight of population reached very significant level, the interaction of sowing date and applied amount of N fertilizer, applied amount of P 2O 5 and applied amount of K 2O reached significant level. The effects of five main cultivating factors on coefficient of economic and harvest index is not significant. There is very significant difference among dry physical weight of population and no difference among coefficient of economic and harvest index in different yield ranges.There is an extremely significant positive correlation between population yield and dry physical weight of population, coefficient of economic and harvest index.There is no significant correlation among population yield and coefficient of economic, harvest index, dry physical weight of population and coefficient of economic, harvest index. Therefore to increase population yield must increase dry physical weight of population.

关 键 词：油菜 群体产量 群体干物重 经济系数 栽培因素 

分 类 号：S565.404[农业科学—作物学]