1976～1986年,我国杂交稻累计种植面积9·1亿亩,增产稻谷450多亿公斤。自80年代以来,我国杂交稻在许多方面取得了突破性的进展。 1.选育成一批早熟组合,较好地解决了杂交早稻“早而不优,优而不早”的矛盾。这批组合在长江流域推广,使杂交早稻实现了早、迟熟组合的配套,晚稻实现了早、中迟熟组合配套,并把我国的杂交早稻种植区域由北纬25度向北推移3度,为双 From 1976 to 1986, the total acreage of hybrid rice in China was 91 million mu, increasing the output of more than 45 billion kilograms of rice. Since the 1980s, hybrid rice in our country has made breakthrough progress in many aspects. 1. Bred into a group of precocious combinations, a better solution to the hybrid early rice “early and not good, excellent and not early ” contradiction. The combination of these groups in the Yangtze River Basin promotion, hybrid early rice to achieve early and late combination of facilities, late rice to achieve early and middle late combination of facilities, and to our hybrid early rice planting area from north latitude 25 degrees 3 degrees northward, Double