湖北省阳新县国营综合农场十里湖农科所徐德该同志: 你来信提到的关于杂交稻制种的几个问题,现答复如下: 一、杂交稻制种生育期的观察记载方法,不完全和常规稻相同。首先在秧田选择有代表性的植株12株,按株号分别记载,移栽时按株号顺序栽植大田(父本按期的排列顺序定植。母本按 Comrade Xu De of the Shilihu Agricultural Science Research Institute, State-owned Comprehensive Farm, Yangxin County, Hubei Province Comrade Zhu De: Here are some of the questions about the hybrid rice seed production mentioned in your letter. The current reply is as follows: I. Observation and documentation of the hybrid rice seed production period. Exactly the same as regular rice. First of all, 12 representative plants were selected in the field of seedling, which were recorded separately according to the plant number. The transplanted plants were planted in order of plant number