BaoCai, Chinese cabbage, for one, the biennial herbaceous plants, can be formed and round. BaoCai organs, Chinese cabbage mainly blade for products, sufficient nitrogen supply can increase the chlorophyll content, increase the intensity of photosynthesis, leaf blade thick, dark green and round is advantageous to the outer leaf to expand and enrich; Phosphorus can promote cell division and differentiation of leaf primordium, accelerating the formation of round, promote root growth. Potassium can enhance photosynthesis, promote blade organic material manufacture and operation. BaoCai, Chinese cabbage is a kind of high fertilizer plants, is a big demand for NPK, according to measurement, each producing 1000 kg BaoCai or Chinese cabbage, 1.77 kg, need to absorb from the soil nitrogen phosphorus pentoxide 0.81 kg, 3.72 kg, kali the ratio was 2.2:1:4. 6. In order to ensure high quality and high yield of BaoCai, Chinese cabbage, in accordance with the requirements for pollution-free vegetable production technology, in view of the BaoCai, Chinese cabbage growth characteristics and the law of fertilizer, put forward the following fertilization techniques:
　　1, fertilization principle: give priority to with organic manure, chemical fertilizer as the auxiliary pole; Give priority to with basal fertilizer as the auxiliary pole.
　　2, applied fertilizers. BaoCai, Chinese cabbage grow faster, growth is big, need a large amount of organic fertilizer rates as basal. General should be high quality rotten organic fertilizer rates of 4000-4000 kg per mu, can broadcast, can also according to the row spacing furrowing banding. On this basis, should also be applied per acre BaoCai, Chinese cabbage 40-50 kg urea, in order to satisfy the demands of BaoCai, Chinese cabbage growth and development in the whole stages.
　　3, the miao qiao top application. One is good to mention seedling fertilizer. In soil fertility is not high, according to the per mu shi BaoCai, Chinese cabbage urea 5 kg, into the small lift seedling fertilizer, can promote seedling growth, and makes the rootstocks, weak seedling to seedling development. The second is good core application. BaoCai heart, Chinese cabbage in the package, knot ball period, are in the vigorous growth period, the daily growth of up to 75-100 grams, only need timely and fertilizer, shi BaoCai, Chinese cabbage specific fertilizer 15 to 25 kg per mu, such not only can improve BaoCai, Chinese cabbage yield and quality, also can improve BaoCai, Chinese cabbage forage-livestock system.