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母本僵苗影响母本生长发育和导致父母本生育进程不协调、花期相遇不良，以及母本每亩颖花数减少和结实率下降，是杂交水稻制种产量下降的主要因素之一。现根据汕优63、协代63等组合多年制种实践，将其发生、危害和预防措施介绍如下：一、发生原因1．水僵。母本小苗一叶一心直栽
One of the main factors that decrease the yield of hybrid rice seed production is that female parent stiff seedling affects the growth and development of the female parent, which leads to the uncoordination of the parental growth process, the poor flowering encounter, and the reduction of the number of spikelets per hectare and the seed setting rate of the female parent. According to Shanyou 63, 63 and other combinations of the Association for many years of seed production practices, its occurrence, hazards and preventive measures are described below: First, the causes of 1. Water stiff. The mother of seedlings a leaf straight heart planted