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秋末第一次出现的霜冻称为“初霜冻”,春季最末一次出现的霜冻称为“终霜冻”。这是气象上规定的。这两次霜冻往往对农作物带来危害。据多年调查,我国大部分地区(包括四川盆地在内)每年春播育秧期间,在往会受到晚霜和寒潮低温的袭击,造成不同程度的烂秧。因此,各地都采取不同的方法进行预防,并取得一定的效果。综合各地经验可采取如下方法预防: l、“夜灌日排”。晚上11点左右灌水淹没
The first frost to appear in late autumn is called “early frost,” and the last frost in spring is called “final frost.” This is meteorologically defined. These two frosts often cause harm to crops. According to years of investigation, most areas in our country, including the Sichuan Basin, are affected by night frost and cold wave temperatures during the Spring Sowing Seedlings every year, resulting in different degrees of rotting seedlings. Therefore, different localities adopt different methods to prevent and achieve certain results. Comprehensive experience can take the following precautions: l, “irrigation day row.” About 11 o’clock at night irrigation flooded