在毛主席革命路线指引下,我国水稻杂种优势利用的研究在取得了振奋人心的大突破后,已经进入生产推广阶段,为水稻大幅度增产开创了一条新途径。但是,由于人们对水稻杂优利用这一新生事物的实践经验还不多,目前制种的产量还不高。一九七六年,我们协助屯里大队搞南优二号制种,在实践中体会到,制种成败的关键在于父母本花期是否相遇,在花期相遇的前提下,花时也要相遇得好,才能提高异交结实率。花期花时 Under the guidance of Chairman Mao’s revolutionary line, the study on the utilization of rice heterosis in our country has entered the stage of production promotion after it has achieved a great and exciting breakthrough and opened up a new channel for a substantial increase of rice output. However, due to the fact that people have little practical experience in using this new thing for rice hybrids, the yield of current seed production is still not high. In 1976, we assisted the brigade in Tunli to engage in the seed production of Nanyou No.2. In practice, we realized that the key to the success or failure of seed production lies in the meeting of parents’ flowering. Under the premise of meeting flowering, the time spent encountering Well, in order to improve the rate of out-crossing. Flowering time