广东省地处华南亚热带地区,但早稻于生育前期、晚稻于生育中后期均有可能遭到低温冷害;特别是秋季的寒露风和霜降风,成为威胁本省晚稻生产的主要灾害性天气之一。1983年晚稻全省栽培杂交水稻的面积超过500万亩,其中“汕优6号”占7成以上,1984、1985两年翻秋种植杂交水稻的面积也很大,因此开展低温对其影响的研究,以便在晚造生产中制订合理的安全抽穗期等趋利避害措施是很有必要的。 Guangdong Province is located in the subtropical region of South China. However, early rice is likely to be chilling injury during the early and late growing stages of early rice. Cold dew and frost and wind fall in autumn are one of the major catastrophic weather threatening the production of late rice in this province. In 1983, the area of ​​late rice cultivation in hybrid rice in the province was more than 5 million mu, of which “Shanyou 6” accounted for more than 70%. In 1984 and 1985, the area of ​​hybrid rice planted with autumn was also very large, so the influence of low temperature on it Research, in order to make a reasonable late heading in the production of safe heading and other anti-dumping measures is necessary.