据我县杂交水稻各制种基地连续五造的观察,在一般情况下,不育系二九南1号、珍汕97、常付、广陆银和金南特等,分别与恢复系2号、3号、6号和7号等配组制种,除受亲本种性制约外,影响开花时间的因素虽有多种,但左右开花时间、影响异交结实率高低的主要因子是水分,即田面水层、田中水分及花期白天晴雨状况等,而以颖壳上的水分影响最大。上述不育系和恢复系,只要生理水分充足,在气温22—36℃范围内,颖花周围湿度为65—85%时,一般于上午9—10时始花,11—12时盛花,下午两点半后结束。如湿度增到95%以上,尤其颖壳上有露水附着,或遇雨天,开花时间就会 According to the observation of five consecutive hybrid rice seed production bases in our county, under normal circumstances, two sterile lines, ie, No.29 Nan 1, Zhenshan 97, regular pay, Guangluan and Jinnan specialties, , 3, 6 and 7, except for the parental species constraints, although there are many factors that affect the flowering time, the main factors influencing the rate of outcrossing and fruiting are water content, That is, surface water layer, Tanaka moisture and flowering during the day and other conditions, while the moisture on the corydalis has the greatest impact. The above sterile lines and restorer lines, as long as sufficient physiological water, in the temperature range of 22-36 ℃, the relative humidity of 65-85% spikelets, usually at 9-10 am flowers, flowers at 11-12, afternoon After half past two. Such as the humidity increased to 95% or more, especially the glume on the dew attachment, or rainy days, flowering time will be