Summer Chinese cabbage to fill the market gap how to prevent Chinese cabbage from not caring

In recent years, vegetable farmers use plastic greenhouse to grow Chinese cabbage in summer, which makes Chinese cabbage supply all the year round, and because of its fast growth rate, short cycle and high economic benefit. However, with the different ways of planting and management, a large number of Chinese cabbages are unprotected in summer. Many vegetable farmers consult the reasons why Chinese cabbage is uncaring and how to overcome it. The following answers are given:

Chinese cabbage doesn't care.

The reason for not caring:

Improper fertilization, high temperature in summer, many vegetable farmers in order to promote the growth rate of Chinese cabbage, partial application of nitrogen fertilizer, less phosphorus and potassium fertilizer, resulting in too much nitrogen fertilizer, insufficient phosphorus and potassium fertilizer, Chinese cabbage is not wrapped or loose.

Uneven moisture: high temperature in summer, rapid growth of Chinese cabbage, large water demand, if not timely and uniform watering, Chinese cabbage is easy to be unprotected.

Rain Water has a lot of humidity: it rains a lot in summer, and the humidity in the field is high, which affects the growth of Chinese cabbage.

Diseases and insect pests: there is a high incidence of diseases and insect pests in Chinese cabbage in summer, especially soft rot, dry heart disease, downy mildew, powdery mildew, virus diseases, aphids, cabbage insects, etc., which affect the growth of Chinese cabbage.

Response measures:

adequate manuring. In the heart stage of Chinese cabbage, increase the application of phosphorus and potassium fertilizer, organic fertilizer, control nitrogen fertilizer to restrain its crazy growth. Generally, in the early and middle stages of heading of Chinese cabbage, one potassium dihydrogen phosphate or ternary compound fertilizer was applied, 10-15 kg per mu, followed by watering.

Scientific watering: in the Chinese cabbage heart period, water is uniform and adequate supply, avoid more and less, in case of dry and wet, keep the soil moist, can be watered once in the morning and evening, do not water at noon. At the same time, the border should be covered with weeds 3 to 5 centimeters thick to reduce water loss and keep the soil moist.

Prevention and control of diseases and insect pests: in the heart period of Chinese cabbage, the leaves of Chinese cabbage are often inspected and when downy mildew and soft rot are found, at the initial stage of the disease, use 40% ethyl phosphine aluminum wettable powder 200 times, or 50% Ruidu manganese zinc 500 times 600 times, or 50% nail cream copper wettable powder 600 times 800 times, spray once every 7 to 8 days, control 2 times continuously for 3 times. Timely spraying foliar fertilizer: in the pericarp stage of Chinese cabbage, 800 times vegetable special organic humic acid active liquid fertilizer can be sprayed every 7 to 10 days, or 0.3% urea and 0.3% potassium dihydrogen phosphate mixture, spray 2 times 3 times, evenly wet leaves, can effectively promote the heart of Chinese cabbage.

Setting sunshade net: after sowing Chinese cabbage in summer, setting silver gray or black sunshade net on the front slope of the shed can significantly reduce the temperature in the greenhouse and benefit the heart of Chinese cabbage.