目前我国杂交水稻的种植面积占水稻总面积的四分之一。从1976—1986的十年间,我国杂交稻累计种植面积达9.1亿亩、增产稻谷900多亿斤。据不完全统计,1987年全国种植杂交稻1亿5千5百万亩以上,比86年扩大2千多万亩。然而,从当前我国各地的制种产量来看,单产高的可达300公斤,一般的只有100公斤左右。所以,提高制种的产量,不仅对发展杂交稻十分必 At present, the acreage of hybrid rice in China accounts for one quarter of the total area of ​​rice. In the ten years from 1976-1986, the cumulative acreage of hybrid rice in China reached 910 million mu, increasing over 900 billion kg of rice. According to incomplete statistics, in 1987, more than 105 million mu of hybrid rice was planted and more than 20 million mu more than that of the previous year. However, judging from the current seed production in various parts of China, the high yield can reach 300 kilograms, generally only about 100 kilograms. Therefore, increasing seed production is not only necessary for the development of hybrid rice