湖南省种子公司杂交水稻繁殖制种专家许世觉同志,经过深入研究,摸索出杂交稻由三期父本制种改为一期父本制种一整套技术,取得完全成功,增产效果非常显著。1987年,在许世觉专家指导下,湖南省示范推广该项技术2万多亩,普遍获得丰收。现将湖南省湘潭市、县对一期父本制种田现场考 Comrade Xu Shijue, an expert on hybrid rice breeding in Hunan Seed Company, made a thorough study to find a complete set of technology for changing the hybrid rice from the third-stage paternal plant to the second-stage paternal plant. The yield was very significant. In 1987, under the guidance of Xu Shijue experts, Hunan Province demonstrated and popularized more than 20,000 mu of this technology and generally received a bumper harvest. Now Xiangtan City, Hunan Province, a patriarchal farming field test