【摘要】 对晚３、协青早Ａ等７个主要亲本进行了分期播种试验和开花习性观察，研究，总结了这些亲本的变化规律，并提出相应调控技术。更多还原

【Abstract】 The growth characteristics and flowering habits of seven main parents for hybrid rice seed production including wan 3,Xieqingzao A were studied by sowing in different seasons in the field.The study summarized a rule of parents variation and put forward a set of technical method of hybrid rice seed production.更多还原