论文部分内容阅读
我们知道,低温冷害(寒露风),是晚稻后期的主要气象灾害之一。多年的农业气象观测试验表明,晚稻迟熟品种,当日平均气温低于20℃时,即使出现一天,便对抽穗开花有影响。所以,可把日平均气温高于20℃的结束日期,作为晚稻迟熟品种安全齐穗的终止日期。根据这个指标,对照分析灵山县气象站的历史气候资料,≥20℃终日的出现,与当年日平均气温稳定通过10℃初日有密切关系:(1)日平均气温稳定通过10℃初日与≥20℃终日之间的有效积温和有效积温与间隔天数,存在着直线关系(图一、图二)。生长季愈早,该年生长季内>10℃至>20℃之间的有效积温愈多,期间隔天数愈长,反之,有效积温愈少,日数愈
We know that cold chilling (cold dew) is one of the major meteorological disasters late late rice. Years of agricultural meteorological observations show that late rice varieties late maturity, the average daily temperature below 20 ℃, even if one day, it will have an impact on heading and flowering. Therefore, the daily average temperature can be higher than the ending date of 20 ℃, late late varieties of late rice as a safe end date. According to this indicator, the historical climatological data of the Lingshan Meteorological Station are analyzed and compared. The appearance of ≥20 ℃ all day is closely related to the stable daily average temperature of 10 ℃ through the first day of the same year. (1) The average daily temperature is stable through 10 ℃ first day and ≥20 ℃ The effective accumulated temperature between the end of the day and the effective accumulated temperature and interval days, there is a straight line (Figure 1, Figure II). The earlier the growing season, the growing season, the effective accumulated temperature> 10 ℃ to> 20 ℃, the longer the number of days interval, the other hand, the less effective accumulated temperature, the number of days more