氮素营养水平对小麦开花后碳素同化、运转和产量的影响

Effect of Nitrogen Nutrition on Carbon Assimilation and Transfer and Yield after Wheat Anthesis

在大田高产条件下 ,研究了氮素营养水平对二个小麦品种开花后碳素同化、运转和产量的影响。结果表明 ,提高氮素营养水平可以提高开花后旗叶叶绿素含量和光合速率 ,延长光合速率高值持续时间。适量增施氮肥能够促进开花后营养器官贮存的光合产物向籽粒中的运转 ,提高籽粒可溶性糖含量 ,促进淀粉积累 ,进而提高粒重 。

The effects of nitrogen nutrition on carbon assimilation and transfer and yield of wheat after anthesis in the field with high yield condition had been studied . The results showed that the application of adequate nitrogen promoted chlorophyll content and photosynthetic rate of flag leaf after anthesis and the transfer of reserved carbohydrate in vegetative organs to the grain. It also increased soluble sugar content in wheat grain and the accumulation of starch in wheat grain and the grain weight and yield.