Key points of fertilization techniques for Chinese Cabbage

(1)Apply enough organic fertilizer

Applying enough basal fertilizer is the basis of obtaining a bumper harvest of Chinese cabbage. Generally, the soil fertility of old vegetable fields is relatively high, and the application of organic fertilizer should be appropriate; while the soil fertility of new vegetable fields is not high, it is particularly important to apply organic fertilizer and phosphorus fertilizer as base fertilizer.

(2)Skillful application of seedling fertilizer

Chinese cabbage cotyledons grow out, the taproot has reached about 10 cm; and the occurrence of a lateral root, has the ability to absorb water and fertilizer, in the case of insufficient base fertilizer or no seed fertilizer, to apply a small amount of seedling fertilizer, 5 - 7 kg urea per mu, promote long birth. Fertilization should focus on partial application of seedlings, weak seedlings, to promote the formation of strong seedlings.

(3)rational topdressing

Generally, two topdressing treatments should be carried out before the seedling ball enters the lotus stage and the heart is covered, which is the key to ensure the high yield of Chinese cabbage. At this time, Chinese cabbage is in the rapid growth period, should increase the amount of topdressing, mainly nitrogen, nitrogen and phosphorus and potassium fertilizer, or regular water manure. During the growth period, foliar spraying of 1000 times diluted Kezi 891 plant growth promoter (titanium citrate solution) or 0.5%-1% urea and potassium dihydrogen phosphate mixture can improve the clean vegetable rate of Chinese cabbage and improve the commodity value.

(4)Pay attention to potassium fertilizer application

The disease resistance and storage tolerance of Chinese cabbage could be enhanced by increasing potassium fertilizer application, but potassium fertilizer application was often neglected in production. The usual potassium dosage is 20 kg potassium sulfate or 15 kg potassium chloride. A portion of plant ash can be applied when chemical potash is lacking.

It should be pointed out that if the nitrogen supply is insufficient in the growth period, the Chinese cabbage plant will be short, the tissue will be thick and hard, and the yield will be seriously reduced; the Chinese cabbage will not be able to withstand storage due to excessive nitrogen application. If the phosphorus and potassium supply is insufficient in the later stage, it is often difficult to form balls. Chinese cabbage is a calcium-loving crop. When physiological calcium deficiency occurs under bad environmental conditions, dry heartburn often occurs, which seriously affects the quality of products.