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我区早稻(中、迟熟品种)的幼穗分化至孕穗期桂南在5月份;桂中在5月中旬至6月中旬;桂北在6月份。此期间常出现日平均气温≤22℃连续两天或以上的低温天气,有时伴有阴雨、寡照,群众称之“五月寒”,并反映对早稻产量有影响。为探讨其影响程度,我站从1980年开始对其与产量的关系进行分析,并用人工气候箱模拟,结果认为早稻幼穗分化至孕穗期间的低温天气对幼穗生
My area early rice (medium and late varieties) panicle differentiation to booting Guinan in May; Guangxi in mid-May to mid-June; northern Guangxi in June. During this period, the daily average temperature <22 ℃ for two consecutive days or more low temperature, sometimes accompanied by rainy, oligo-proof, the masses called “May cold” and reflects the impact on the yield of early rice. In order to investigate the degree of impact, I started to analyze the relationship between the yield and its production in 1980 and simulated it by artificial climate chamber. The results showed that the low temperature in early panicle differentiation to booting period had no significant effect on young panicle