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一、蓄墒灌溉 亦称储水灌溉或播前泡地,春灌主要为蓄墒,一般较冬灌蓄墒量大,春灌时间务必于播前20日左右结束,如灌水时间稍迟,或遇连阴雨天气,会因墒情过大而降低地温,影响播种出苗 二、播种灌溉 这是一次不得已而进行的灌溉,因此既要讲究灌水方法,又要严格注意灌水时间,只有在表墒不足,不能保证播种、出苗时,才进行灌溉,即当0～20厘米土层含水量低于65％～70％,且已临近播期,又无降水预兆时才可进行,如播前5日内降水量大于10毫米,播前10日内
First, storing moisture irrigation Also known as water storage irrigation or sowing before the bubble, spring irrigation is mainly stored moisture, generally more than the winter irrigation storage capacity, spring irrigation time must be about 20 days before the end of the broadcast, such as irrigation time later, or even rainy The weather will be due to excessive moisture and reduce the ground temperature, affect the sowing Emergence II, sowing irrigation This is a last resort for irrigation, it is necessary to pay attention to irrigation methods, but also pay strict attention to irrigation time, only in the table inadequate moisture, can not guarantee planting , Only when the emergence of irrigation, that is, when 0 ~ 20 cm soil moisture content of less than 65% to 70%, and has been near the sowing time, without precipitation warning can be carried out, such as sowing 5 days before the precipitation is greater than 10 Mm, within 10 days before sowing