为适应社会主义市场经济,加速农业向“两高一优”发展,上海市郊近年来积极稳步发展杂交粳稻,由上海县种子公司和市农科院分别育成的杂交粳稻寒优湘晴和寒优1027两个组合,分别于1988年和1989年通过市农作物品种审定委员会审定后。在市、县有关领导的重视下,经过生产、科研、种子和推广各部门共同努力,种植面积逐年有所发展,1990年面积为10.5万亩,1991年扩大到22.18万亩,1992年种植34.43万亩,占全市单季晚稻11.4%。在大面积生产中,杂交粳稻表现高产、优质。如1991年平均亩产563公斤,比常规稻增产10.7%,1992年后期受台风影响, In order to adapt to the socialist market economy and accelerate the development of agriculture toward “two highs and one superior”, the suburb of Shanghai has been actively and steadily developing hybrid japonica rice in recent years. The hybrid rice bred by Shanghai Seed Company and the Academy of Agricultural Sciences respectively, You 1027 two combinations, respectively, in 1988 and 1989 through the City Crop Variety Approval Committee after the validation. With the joint efforts of various departments of production, scientific research, seed and extension, the planting area has been developed year by year with an area of ​​105,000 mu in 1990, 221,800 mu in 1991 and 34.43 in 1992 Mu, accounting for 11.4% of the city’s single-season late rice. In large-scale production, hybrid japonica rice shows high yield and good quality. For example, the average yield per mu in 1991 was 563 kilograms, an increase of 10.7% over that of conventional rice. Influenced by the typhoon in late 1992,