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水稻分蘖末期决定了每宙穗数,拔节长穗期决定了每穗粒数,但这时的穗数与粒数,还不是实际产量,而只是产量的容纳能力,真正的产量要看抽穗后,在灌浆结实期,全部颖花的灌浆充实程度。实粒占总颖花数的比率称结实率,不实粒(包括空粒与瘪粒)占总颖花数的比率称空瘪率。结实与空瘪是水稻结实过程中矛盾对立过程,二者的消长决定了实际产量的高低。一、灌浆结实的动态稻穗抽出剑叶叶鞘后,在当日或次日即开始开花,开花后约7—8小时受精,受精卵约在开花后9—14小时进行第一次分裂,16小时左右进行第二次分裂。开花后4—5天幼胚已经分化,并开始灌浆,以后灌浆
The late tillering of rice determines the number of spikes per panicle, and the number of spikelets per spike determines the number of spikelets per plant at the jointing and panicle stage. However, the number and number of spikes at this time are not actual yields, but rather the capacity of the crop. , Filling in the grain-filling stage, filling the full extent of the filling of the flowers. Real grains accounted for the ratio of the total number of spikes, said the seed setting rate, false grains (including empty and shriveled) accounted for the total number of spongles called empty flat rate. The firmness and emptyness are the process of contradiction and antagonism in the process of rice solidity. The growth and decay of both determines the actual output. First, the dynamic grain filling of rice leaves out of the flag leaf sheath, the day or the next day began to flowering, flowering after about 7-8 hours of fertilization, about 9-14 hours after flowering fertilized eggs first division, 16 hours Around the second split. Four to five days after anthesis, the immature embryos have differentiated and begin to be grouted and later grouted