Chinese cabbage fertilizer law and fertilization method
Cabbage is an important leaf vegetable. Large white menu production is very high, and there are more fertilizer requirements. The ratio of nitrogen, phosphorus and potassium is 1:0.4:1.1. Therefore, Chinese cabbage, like other leafy vegetables, has a particularly important significance for promoting the formation of hypertrophic green leaves and increasing the photosynthetic rate during the vegetative growth period. Due to different growth and growth rates of Chinese cabbage at different growth stages, the requirements for nutritional conditions are also different. The general laws of sucking up fertilizer are: less nutrient absorption at the seedling stage, absorption of N, P, and K is less than 1% of the total absorption; rosette period is significantly increased, its absorption accounts for about 30%; the absorption of the heart is the most, accounting for the total About 70% of the volume. 1. Apply organic fertilizer. Applying basal fertilization is the basis for the harvest of Chinese cabbage. In general, the soil fertility of old vegetable fields is relatively high, and organic fertilizers should be used in appropriate amounts. However, the soil fertility of new vegetable fields is not high. It is particularly important to reuse organic fertilizers and phosphate fertilizers as base fertilizers. 2. Qiao Shi mention Miao Fei. After the Chinese cabbage cotyledon grows, the main root has reached about 10 centimeters; and a lateral root has occurred, which has the ability of absorbing water and sucking fertilizer. Under the condition of insufficient base fertilizer or no application of fertilizer, a small amount of seedling fertilizer is applied per mu. 5? 7 kg urea, promote growth. Fertilizer should focus on partial application of small seedlings, weak seedlings, and promote the formation of strong seedlings. 3. Reasonable fertilizer. It is generally the key to guarantee the high yield of Chinese Cabbage when it is necessary to seize the seedlings of the seedlings and begin to enter the rosette stage and start dressing twice. At this time, Chinese cabbage is in a period of rapid growth, and it is necessary to increase the amount of topdressing fertilizer, mainly nitrogen fertilizer, and apply N fertilizer and P and K fertilizers, or regularly apply water manure. During the growing period, the foliar sprayed with KE 891 phyto-promoter (titanium citrate) or 0.5% to 1% of urea and monobasic potassium dihydrogen phosphate diluted 1000 times can increase the net rate of Chinese cabbage and improve Product value. 4. Pay attention to the application of potassium fertilizer. Potassium fertilizer can increase the disease resistance and storage resistance of Chinese cabbage, but potassium fertilizer is often neglected in production. The amount of potassium applied is generally 20 kg of potassium sulfate or 15 kg of potassium chloride. In the absence of potash, part of the plant ash can be applied. It should be pointed out that if the supply of nitrogen is insufficient during the growing season, the Chinese cabbage plants are short and the tissues are rough and severely reduced production. The Chinese cabbage is used with too much nitrogen and is not resistant to storage. As for the ball-type vegetables, if the supply of phosphorus and potassium is insufficient in the later period, it is often difficult to make the ball. Cabbage is a hi calcium crop. When poor environmental conditions occur physiological calcium deficiency, dry heart disease often occurs, seriously affecting product quality. Fresh Peeled Garlic,Storing Fresh Garlic,Storing Chopped Garlic,Preserving Peeled Garlic shandong changrong international trade co.,ltd. , https://www.changronggarliccn.com