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成都平原在历史上习惯种植一季中稻,很少出现冷害。为了充分利用地力和光能,自1958年以来,推广了双季稻和玉米连作晚稻,使水稻生长时期由原来的4—8月扩延为3—10月,水稻栽培季节向着气温较低的早春和晚秋延伸。在这样的气候环境下,栽培措施稍有不当,就容易遭遇低温,发生冷害。一、水稻冷害的时期和主要表现低温造成双季稻冷害,在成都平原常见的有五个时期:
Chengdu Plain is used to planting a season of rice in the history, rarely cold damage. In order to make full use of the geo-energy and light energy, double cropping rice and maize continuous cropping as late rice have been popularized since 1958, extending the rice growth period from April to August to March to October. In rice cultivation season, And late autumn extension. In such a climate environment, cultivation measures are slightly improper, it is easy to encounter low temperature, chilling injury. First, the chilling injury of rice and the main performance of cold caused double crop damage, in the Chengdu Plain five common periods: