杂交粳稻于一九七七年在我县重点试种十亩地获得了增产。一九七八年进行多点试验、示范,全县有十二个农场、三十九个管理区、六十四个生产队,共种植杂交稻八百七十亩,实际收获平均亩产一千零二十九点七斤,杂交粳稻与丰锦比较有明显的增产效果,其增产幅度在百分之三十八左右。在二年试验,示范的基础上,七九年进行了大面积推广。全县共种植杂交稻十五万五千五百亩,占水稻面积的百分之三十点八。其中,黎明 A×C57(简称 Hybrid japonica rice obtained an increase in production of 10 mu of key trial seeds in our county in 1977. In 1978, a number of experiments and demonstrations were conducted. In the county, there are 12 farms, 39 management districts and 64 production teams. Eight hundred and seventy acres of hybrid rice were planted. The actual harvest averaged one mu per mu One hundred and twenty-nine seven pounds, Japonica hybrid rice and Feng Jin obvious yield increase effect, its yield increase of about 38 percent. On the basis of two years of experiments and demonstrations, a large-scale promotion was carried out in 1979. The county planted a total of 158,500 acres of hybrid rice, accounting for 30.8% of the rice area. Among them, Dawn A × C57 (referred to as