Good water and fertilizer management of Chinese cabbage in autumn and winter is the key to a good harvest of Chinese cabbage.

Good management of water and fertilizer is the key to the high yield of Chinese cabbage. When planting Chinese cabbage in autumn and winter, it should be managed correctly according to the climate and the requirements of water and fertilizer in each growing period of Chinese cabbage.

Water and fertilizer management of Chinese cabbage

1. Seedling stage: the root system of Chinese cabbage is underdeveloped, the absorption capacity is weak, and it is drier in autumn and winter, so it is necessary to provide enough water in time, adhere to small water and frequently irrigate to promote root growth. When the heart is broken, once topdressing fertilizer, urea 3-4kg per mu, seedlings each time, combined with mid-tillage, thin application of seedling fertilizer, urea 5-6kg or clear manure water, biogas liquid 600-800kg per mu.

two。 Rosette stage: the rapid growth period of Chinese cabbage, which requires higher water and fertilizer in order to meet the exuberant growth of Chinese cabbage. After setting the seedlings or slowing down the seedlings of Chinese cabbage, we should open holes or furrows between rows or plants and apply 20-25kg compound fertilizer per mu. After topdressing, we should irrigate once, and then water according to the dry and wet condition of the soil.

3. Heading period: it is the key period for the formation of Chinese cabbage, which requires a large amount of fertilizer and water, and water and fertilizer management during the heading period, with emphasis on the initial and middle stages of heading, that is, "pumping fertilizer" and "heart-filling fertilizer". When the heart begins, topdressing fertilizer is applied immediately, applying compound fertilizer 18-22kg per mu, urea 6-8kg per mu, and again after the extraction of Chinese cabbage, combined with irrigation after topdressing, it is better to irrigate slowly. Or use water-soluble fertilizer with water, stop irrigation 10 days before harvest, lest Chinese cabbage is not resistant to storage because of too much water.