湖南自1979年开始试验示范杂交早稻,经过10年探索,经历几上几下的起伏过程,现已进入稳步发展的阶段。　　一、杂交早稻生产现状及增产优势　　　　1986年.全省只种双季杂交早稻73万亩,1987年发展到14O多万亩,扩大近1倍;1988年又发展到387万亩,比1987年扩大1.8倍。实践证明,湖南 Since 1979, Hunan has experimented on demonstration hybrid early rice. After 10 years of exploration, it has undergone several ups and downs and has now entered a stage of steady development. First, the production status of hybrid early rice and yield advantage In 1986, the province only double cropped early hybrid rice 730000 mus, 1987 to 14O million acres, nearly doubled; in 1988 and developed to 387 acres, more than in 1987 Expand 1.8 times. Practice shows that Hunan