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一、培土:培土是软化叶鞘和增加葱白长度的重要措施,直接影响大葱的产量和质量。培土应每半月一次,连培3至4次。培土须在上午露水干后,土壤凉爽时进行,如土温高、湿度大、易引起烂茎。每次培土高度以培至葱心叶处以下为准。培土超过心叶以上易引起烂心,太浅又不利于葱白伸长。二、肥水管理:进入9月份、气温转凉生长加快,要追一次化肥,一般每亩15—20公斤硫铵加5公斤磷酸二铵。以后可再追肥一次。追肥可结合浇水进行、浇水
First, soil preparation: Soil preparation is to soften the leaf sheath and increase the length of an important measure of green onion, a direct impact on the yield and quality of green onions. Soil should be once every two months, even training 3-4 times. Soil must be dried in the morning after dew, the soil cool, such as soil temperature, humidity, easy to cause bad stems. Every time to cultivate the soil to cultivate the following leaves whichever leaves. Earth above the heart leaves easily lead to rotten heart, too light and not conducive to the scallion elongation. Second, fertilizer and water management: Into September, the temperature turned cooler to accelerate, to chase a fertilizer, generally 15-20 kg per acre plus 5 kg ammonium dihydrogen phosphate. After the top dressing can be time. Top dressing can be combined with watering, watering