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1976年我省开始大面积推广杂交水稻,1979年达到高峰,全省推广面积近900万亩.1980年推广面积有所下降,1982年降到600万亩.1983、1984年面积又有回升.鉴于出现这小马鞍型的现象,不少的生产部门认为杂交水稻的杂种优势衰退了.因而推广面积不能一直上升.为弄清杂交水稻优势是否衰退,本文以四优2号、汕优6号多年的区域试验数据与红晚52、矮脚圹竹作比较,进行杂种优势稳定性的分析.
In 1976, the province started a large-scale popularization of hybrid rice and reached a peak in 1979, with a total area of nearly 900 million mu in the whole province. The area for popularization dropped in 1980 and dropped to 6 million mu in 1982. The area returned to normal in 1983 and 1984. In view of this small saddle-shaped phenomenon, many production departments think hybrid rice hybrids decline, so the promotion area can not be increased.In order to find out whether the advantage of hybrid rice is declining, this paper takes Siyou 2 and Shanyou 6 Years of regional test data and red night 52, compared to the short-footed bamboo, hybrid stability analysis.