论文部分内容阅读
我国1964年开始研究杂交水稻,十年之后就成功地实现了三系配套,选育出了能应用于生产的强优组合,成为世界上第一个在生产上利用水稻杂种优势的国家。杂交水稻种植面积由1976年的200万亩,发展到1987年的15000万亩,为我国粮食生产作出了重大贡献。 然而,在这十多年的时间里,杂交早稻的发展却十分缓慢。特别是长江域双季杂交早稻的面积更少。1986年,长江流域双季杂交早稻面积仅200多万亩,1987年也只500万亩左右。而我国整个长江流域双季早稻面积有9000多万亩。
China began to study hybrid rice in 1964 and succeeded in implementing the three-line package ten years later. It has bred a combination of high-quality products that can be applied to production and became the first country in the world to make full use of the advantages of rice hybrids in production. The acreage of hybrid rice was increased from 200 million mu in 1976 to 150 million mu in 1987, making a significant contribution to China’s grain production. However, for more than a decade, the development of early hybrid rice has been very slow. Especially, the area of double-crop hybrid rice in the Yangtze River area is even smaller. In 1986, the area of double-crop hybrid rice in the Yangtze River was only about 200 million mu, only about 5 million mu in 1987. However, the area of double-season early rice in the entire Yangtze River has an area of more than 9,000 mu.