1987年1月,在秦皇岛召开了北方杂交水稻科研、生产协作会。会议的中心议题是分析北方杂交水稻科研、生产形势,并预测今后发展的前景。 北方粳稻区域分布在十多个省市,但总面积仅3000万亩,近几年杂交水稻面积仅180-190万亩,只占北方粳稻面积的6%,而全国杂交稻面积约占总水稻面积 January 1987, held in Qinhuangdao North hybrid rice research and production collaboration. The central topic of the meeting is to analyze the situation of scientific research and production of hybrid rice in the north and forecast the prospect of future development. Northern japonica rice is distributed in more than ten provinces and cities, but the total area is only 30 million mu. In recent years, the area of ​​hybrid rice is only 180-190 million mu, accounting for only 6% of the northern japonica rice area, while the national hybrid rice area accounts for about 10% area