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本文首次采用田间试验的方法对国内油菜收获指数的变异进行了研究．结果表明不同油菜品种的收获指数存在变异，其变异规律大致是：１）中熟品种的收获指数高于早熟品种及晚熟品种；２）中长角果的品种较长角品种具有更高的收获指数；３）高产的新品种具有较高的收获指数；４）油菜粒壳比，角杆比及千粒重与收获指数呈正相关，杆重与收获指数呈负相关．
In this paper, the variation of harvest index of Chinese rape was studied for the first time by field experiments. The results showed that there were variations in the harvest index of different rape cultivars. The variation regularities were as follows: 1) The maturity index of middle-maturing cultivars was higher than that of early maturing and late maturing varieties; 2) Index; 3) high yield of new varieties with higher harvest index; 4) Rapeseed shell ratio, angle bar ratio and 1000-grain weight were positively correlated with the harvest index, while the bar weight was negatively correlated with the harvest index.