剪叶对春油菜源库关系的影响

Effect of Leaf-cutting on Spring Rape Source-sink Relationship

试验以春油菜青油-46为供试材料,在花期进行剪叶处理,研究源的减少对库器官的分化和形成的影响,研究表明:油菜花期去叶减少了源的面积,影响了油菜光合产物的积累,使油菜株高降低,茎秆变细,分枝减少,角粒数下降,千粒重增加,角果大小、单位角果皮面积的生产力(PPA)、单位角果皮面积负担的籽粒数(SNPA)下降,生物产量和经济产量降低,对分枝产量的影响大于主花序,且去叶越多下降越大,其中去短柄叶的影响大于长柄叶。

This experiment use the spring rape,green rapeo-46 as the tested materials.Through cutting the leaves of this kind of rape in its period of flowering, we try to find the effect on the differentiation and formation on the organ of sink by reducing the source.The research shows that： cutting the leaves of rape which means reducing the source area,affected the accumulation of photosynthetic product,which directly cause the height of the plant reduce,stems become thinner, branching angles decreases, silique number decreased,thousand seed weight increased,silique size,PPA and SNPA decreased,biological yield and economic yield decreased.And the research also shows that cutting the leaf have bigger influence on the branching yield than cutting the Lord inflorescence.and cutting more reducin~ more,also cutting small leaves have bigger influence than cutting the large leaves.