Early Chinese cabbage does not contain heart prevention

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When cabbage is planted early, it tends to be long-leafed, uninvolved, and has a small cooking ball and low yield. The main reason is that the weather is high in temperature, rainfall is high, or high-temperature land loses water too quickly, and pests and diseases are seriously damaged, especially soft. Diseases such as rot, dry heart disease, downy mildew, powdery mildew, viral disease, aphid, cabbage caterpillar, etc.; improper fertilization, such as excessive nitrogen fertilizer, insufficient phosphorus and potassium fertilizers, uneven water supply, are also the main reasons causing Chinese cabbage not to contain . If you take the following technical measures to strengthen management, you can promote its inclusion.

First, increase phosphorus and potassium fertilizers. After 25 to 30 days of Chinese cabbage planting, application of P and K fertilizers is started. Once every 10 to 15 days, 25 to 30 grams of monopotassium dihydrogen phosphate per plant (applying to fresh water) is applied. Water diluted to 80 ~ 100 times after the application of liquid, even applied 2 to 3 times is appropriate.

Second, spray foliar fertilizer. From the start of Chinese cabbage cabbage, sprayed once every 7 to 10 days, once the leaves are sprayed with 0.3% potassium dihydrogen phosphate, 500 times strong and strong, 1500 times Shennongsu chelate fertilizer mixture, and spray 3 to 5 times. Evenly spray all the leaves to start dropping drops of water to improve the nutritional level of the leaves.

Third, the cream moisturizing. During the growth of Chinese cabbage, it must be ensured that there is sufficient water supply. It should be avoided from time to time, when dry and wet, to prevent curling and wilting of the leaves of Chinese cabbage; when the weather is dry, fresh water is poured every morning and evening. To pour 1.5 to 2 kilograms, cover the surface with wheatgrass or other weeds to reduce moisture loss and keep the soil moist.

Fourth, control pests. Cabbage is harmed by diseases such as virus disease, soft rot, hanging wireworms, aphids, and so on. It will cause non-heart-wrapping and non-balling. Therefore, during Chinese cabbage cabbage, it is necessary to pay attention to inspection of the leaves and find that there are diseases and insect pests. , It is necessary to continuously spray 2 to 3 times 1500 times liquid agricultural music, 1500 times liquid SAM ammonium mixture, or spray 1500 times liquid Leben, 1000 times liquid to kill the mixed liquid for prevention and treatment. If the soft rot disease is seriously damaged, 500 times of agricultural streptomycin should be added together with spraying.

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