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我国南方晚稻受低温影响而减产的问题,是带有普遍性的农业气象灾害。近年来已引起农业、气象工作者的重视,从不同方面开展了此项研究工作,特别是对水稻低温敏感期问题,国内外曾发表过不少文章,但看法不一。日本学者早漱(1969)、佐武和早漱(1970)等报道;受低温最敏感的阶段是四分体至第一收缩期的幼龄小孢子阶段。而利容千等人(1981)报道。水稻减数分裂前期的细线期至合线期和单核花粉期对低温较敏感。鉴于前人的工作,我们于1982年,在安福县农科所进行了大田分期播种试验。9月中旬正遇上连续三天日平均气温低于20℃的低温天气(即9月13—15日的平均气温分
The problem of late rice yield reduction affected by low temperature in southern China is a general agrometeorological disaster. In recent years, agricultural and meteorological workers have paid great attention to this research work from different aspects. Especially for the low temperature sensitive period of rice, many articles have been published at home and abroad, but the opinions vary. Japanese scholars Zaoshing (1969), Zuo Wu and Zashu (1970) and other reports; the most sensitive to the cold phase is the quadrilateral to the first systolic young microspore stage. And Li Rong et al (1981) reported. The mitotic to monogenic and pollen phases of rice pre-meiotic stage are more sensitive to hypothermia. In view of our predecessors’ work, we carried out staged seeding experiments in Daejeon in 1982 in Anfu County Agricultural Science Institute. In the middle of September, it encounters the cold weather with the average daily temperature below 20 ℃ for three consecutive days (ie the average temperature of September 13-15