田间试验表明,油菜(Brassica napus L.)产量的变异与角果数、每角种子数的差异是相联系的,而这种变异又与开花期及开花后的叶面积指数的差异相关。这些结果认为,开花前花序碳同化物的供应状况对决定油菜种子产量是重要的。角果和种子发育成功与否,取决于它吸收碳同化物的能力。这种推测通过遮阴和去叶减少碳同化产物的供给, Field experiments showed that the variation of yield of Brassica napus L. was related to the difference between the number of pods and the number of seeds per horn, which was in turn related to the difference of leaf area index after flowering and flowering. These results suggest that the availability of inflorescence carbon assimilation before flowering is important for determining rape seed yield. The success of pod and seed development depends on its ability to absorb carbon assimilates. This speculation reduces the supply of carbon assimilation products by shading and defoliation,