在上级党组织的领导下,在市杂种优势利用协作组和湖南老农的指导下。我们于1976年繁殖二九南一号不育系4.19亩,获得不育系种子137.2斤/亩,保持系种子225.3斤/亩。经过初步实践,我们有以下几点体会: 一、适时播种,花期相遇二九南一号不育系繁殖属早籼早熟类型。作为早稻栽培的全生育期,不育系为94—98天,保持系为91—94天;总积溫不育系为1064.6℃,保持系为1040.1℃;主茎总叶片数不育系为11.8叶,保持系为12.8叶。不育系此保持系的始穗期迟2—5天,而且 Under the leadership of the superior party organizations, under the guidance of the cooperation group for city heterosis utilization and Hunan veterans. In 1976, we breed 4.19 mu of No.29 South No.1 sterile line and obtained 137.2 kg / mu of sterile line, keeping 225.3 kg / mu of seed. After initial practice, we have the following experience: First, the timely sowing, flowering encounter two nine South sterile line is an early indica variety. As the whole growth period of early rice cultivation, the male sterile lines were 94-98 days and the maintainer lines were 91-94 days. The total accumulated temperature of male sterile lines was 1064.6 ℃ and the maintainer line was 1040.1 ℃. 11.8 leaves, maintaining lines of 12.8 leaves. Male sterile line of this line to maintain the line beginning 2-5 days late, but also