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正确预报危害后季稻(部份晚稻)的秋季低温,必须以准确的秋季低温指标为前提。国内目前沿用的秋季低温指标(南方通称寒露风指标)列于表1。近年来验证该指标后,出现三种结果:一、晚稻抽穗扬花期(下同)出现上述指标受害,如1974年的上海郊区。二、出现上述指标不受害,如1976年9月25～27日,日平均气温为18.1～19.3℃,最高气温连续二天分别是22.2℃和20.0℃(上海市农科院作物所观测记录,下同);1977年9月20～22日,日平均气温为18.1～19.1℃,最高气温连续二天分别是21.7和22.5℃。这二年已
It is necessary to correctly predict the autumn low temperature of the postharvest late season rice (some late rice) on the premise of accurate autumn low temperature index. The current domestic autumn low temperature indicators (commonly known as the South dew dew indicator) are listed in Table 1. In recent years to verify the indicators, there are three results: First, late rice heading and flowering (below) victims of the above indicators, such as the 1974 Shanghai suburbs. Second, there is no harm to the above indicators, such as September 25-27, 1976, the average daily temperature is 18.1 ~ 19.3 ℃, and the highest temperature is 22.2 ℃ for two consecutive days and 20.0 ℃ (Shanghai Academy of Agricultural Sciences crop records, under The same day). From September 20 to September 22, 1977, the average daily temperature was 18.1-19.1 ℃. The highest temperature was 21.7 and 22.5 ℃ for two consecutive days respectively. These two years already