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对黄淮麦区几个高产小麦品种光合产物的积累与分配及其籽粒灌浆特性进行了研究 ,结果表明 ,供试品种生物干重积累的动态呈“S”型曲线 ,苗期增长缓慢且冬性品种积累量相对较小 ,春性品种积累量较大 ,3月中下旬积累迅速增加 ,峰值在 6月上旬 ;花后光合产物是籽粒产量的主要来源 ,花后光合产物的积累对籽粒产量的贡献至少达 6 0 % ,最高可达 88% ;籽粒灌浆的基本特征表现为 ,第 1和第 3阶段灌浆速率基本相当 ,第 2阶段是第1阶段灌浆速率的 2 .7倍。因此 ,花前生物学产量较高 ,花后籽粒第 2阶段灌浆速率较快是实现小麦育种粒大粒饱的重要途径
The accumulation and distribution of photosynthate and the grain filling characteristics of several high-yielding wheat cultivars in Huanghuai Wheat Area were studied. The results showed that the dynamic accumulation of bio-dry weight of the tested cultivars showed a “S” curve, with a slow increase in winter and winter The accumulation of sexual species was relatively small, and the accumulation of spring varieties was large. The accumulation increased rapidly in mid and late March with the peak in early June. The anthesis photosynthesis product was the main source of grain yield. The accumulation of photosynthate after anthesis had significant effect on grain yield The contribution of grain filling is at least 60% and the maximum is 88%. The basic characteristics of grain filling are as follows: the filling rates are basically the same in the first and the third stages; the second stage is 2.7 times the filling rate in the first stage. Therefore, the pre-anthesis biological yield is higher, and the second-stage filling rate of anthesis grain is an important way to realize the grain fullness of wheat breeding grain