一、幼苗期:这时候,苗的根系不发达,抗旱性差,可采取小水勤浇的办法。配合浇水每亩追尿素10公斤。二、莲座期:这时候是大白菜一生的关键时期。一般采取“二浇二追”的措施。就是在蹲苗前可以大水大肥一次,每亩用尿素10公斤左右。当苗 First, the seedling: At this time, Miao’s underdeveloped root system, poor drought resistance, can take a small water pouring approach. With watering 10 kilograms of urea per mu. Second, rosette period: This is a crucial period of Chinese cabbage. Generally take the “two pouring two chase” measures. That is, before the squatting can be a big fat fertilizer once per mu with urea about 10 kg. When the seedlings