Chinese cabbage has a large amount of growth and a short growing period. It is necessary to ensure the supply of nutrients during various growth periods in order to obtain high quality and high yields. 1, seedling period after the seedlings to raise the seedlings Miao ammonium nitrate 10 kilograms raised. 2. During the lotus sitting period, the top-dressing Chinese Cabbage takes a large amount of roots. After the lotus roots are in large numbers, the growth rate increases rapidly, and the amount of fertilizer is large. Generally, 15 kg of ammonium nitrate is applied in the Mushi, and a certain amount of phosphorus and potassium fertilizers are applied to promote the outer leaves. Growth has laid a good foundation for the Baoxin. 3, the core period of the contraction period of the contract period is generally 15 kg of ammonium per acre applied; the middle of the outer core of the envelope almost no longer grow, 10 kg of Mushi ammonium nitrate; late filling, low temperature, slow plant growth, low nutrition absorption, The effect of topdressing is not obvious, and it can be less or no. Standard Infant Warmer,Luxurious Infant Warmer,Medium Infant Warmer Better Medical Technology Co., Ltd. , http://www.fshospitalbed.com