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水稻杂种优势早在本世纪二十年代就被发现,并为人们所注意。日本在六十年代实现了水稻三系配套,但未能在生产上利用,美国、菲律滨、印度等国也相继开展了这项研究,但都未完成三系配套。我国水稻杂种优势利用研究开始于一九六四年,经过几年努力于一九七三年实现了籼型水稻三系配套,粳型水稻也于一九七五年完成了三系配套,经过短时间的试验、示范,便在大面积生产上得到了推广应用,近五年全国共种植杂交水稻二亿五千多万亩,增产稻谷二百六、七十亿
Rice heterosis as early as the twenties of this century have been found, and people pay attention. Japan implemented the three-line rice matching system in the 1960s, but failed to utilize it in production. The United States, the Philippines, India and other countries also carried out this study one after another, but none of them completed the three-line matching. The utilization of rice heterosis in China began in 1964, and after several years of hard work, it achieved the three-line matching of indica rice in 1973. Japonica rice also completed the three-line package in 1975, Short-term tests and demonstrations have been popularized and applied in large-scale production. Over the past five years, more than 250 million mu of hybrid rice have been planted, with an increase of 260 or 700 million hectares of paddy