1986年衡阳市种植双季杂交早稻2.45万亩,亩产488. 8公斤,较常规早稻增产25.6%。衡东县岭茶乡集贤湾村杂交早稻成优49,46.1亩,亩平543.5公斤,最高亩产达605.8公斤。1983—1986年全市共种杂交早稻33.88万亩,亩产470.8公斤,较同期常规早稻单产高82.6公斤,增产21。3%。从近三年全市 In 1986 Hengyang City, planting double crop early hybrid rice 2.45 million mu, 488. 8 kg per mu, compared with conventional rice yield 25.6%. Hengding County Tea Village Jixian Bay hybrid early rice into a superior 49,46.1 acres, 543.5 kilograms per mu, the maximum per-mu yield of 605.8 kilograms. In 1983-1986, a total of 338.8 kilograms of hybrid rice was harvested in the city, 470.8 kilograms per mu, 82.6 kilograms more than the conventional early rice yield, an increase of 21.3%. From the last three years the city