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灌水:大白菜的灌水量和大白菜的需水量、有效降水量、土壤水利用量及地下水的补给量有关。苗期灌溉应少量多次。做到“三水齐苗、五水定棵”。莲座期灌水应注意有一段适当的“蹲苗”时期。但一定要注意不能过度,否则反而不利于大白菜生长。如何控制蹲苗应掌握以下几项指标:第一要观察苗情,外叶色由浅变深但心叶色浅仍旺盛生长时可继续蹲苗,如生长
Irrigation: Chinese cabbage irrigation and cabbage water demand, effective precipitation, soil water use and groundwater recharge related. Seedling irrigation should be a small amount of times. To “Sanshui Qi Miao, Wu Shuizhang.” Lotus period irrigation should pay attention to a period of appropriate “Dunmiao” period. But we must pay attention to not excessive, otherwise it is not conducive to the growth of Chinese cabbage. How to control the squatting seedlings should have the following indicators: First, to observe the Miao, the outer leaf color from light to dark, but the light-hearted leaves still vigorous growth can continue to squat seedlings, such as growth