一般认为,小麦体内氮磷最大积累量出现在生育末期。但也有人指出,小麦生育后期有相当数量的氮磷损失,并认为,这主要是由于氮素向大气中散逸(NO、NO_2,NH_3),磷素向根中倒流造成的。关于小麦体内氮磷元素向穗部运输问题前人已有研究,但对氮磷元素向穗部运输不同步性的研究,还末见报道。为此,我们于1985— It is generally believed that the maximum accumulation of nitrogen and phosphorus in wheat appears in the late growth stage. However, it was also pointed out that there was a considerable amount of nitrogen and phosphorus loss in the late growth stage of wheat and that this was mainly due to the dissipation of nitrogen into the atmosphere (NO, NO 2 and NH 3) and the backflow of phosphorus into the roots. Previous studies on the transport of nitrogen and phosphorus to wheat in the spike of wheat have not been reported yet. However, studies on the unsynchronized transport of nitrogen and phosphorus to the spike have not been reported yet. To this end, we in 1985-