In summer, due to the high temperature and improper management, it is easy to cause the cabbages to be uninvolved, and thus to reduce the yield and benefits. Therefore, corresponding countermeasures should be taken for different reasons.
Find out the cause
Cause cabbage is not covered, mostly due to the following causes, one is excessive use of nitrogen fertilizer, and some vegetable farmers partial application of available nitrogen fertilizer, rather than pay attention to the application of phosphorus and potassium fertilizer, resulting in the lack of phosphorus and potassium fertilizer, making cabbage not package Heart or loose heart. The second is uneven water supply. In summer, due to higher temperatures, Chinese cabbage grows rapidly and requires a large amount of water. If it is not timely and evenly watered, it is very easy to cause cabbage not to contain the heart. Third, there is a lot of rain and humidity. In summer, due to frequent rainfall, the humidity of the Chinese cabbage field is relatively large, which affects the growth of Chinese cabbage. It is also easy to produce Chinese cabbage without worry. Fourth, improper control of pests and diseases, summer cabbage pests and diseases occur more serious, especially soft rot disease, dry heart disease, downy mildew, powdery mildew, virus disease, aphids, cabbage caterpillars, etc., the occurrence of these diseases and diseases to a certain extent affect the Cabbage grows, causing Chinese cabbage not to worry.
Accurate prevention
Rational fertilization. In Chinese cabbage, it is necessary to pay attention to increasing phosphorus and potassium fertilizers and organic fertilizers, and to control nitrogen fertilizers so as to restrain their growth. Generally, in the early stage of ball-bearing and the mid-balloon stage, a three-component compound fertilizer should be applied. Each time, the application rate should be 10 to 15 kilograms per acre, and the water should be flushed with water.
Science watering. In Chinese cabbage, it is necessary to maintain a uniform and sufficient supply of water. Avoid frequent seasons to prevent it from becoming wet when it is dry. It is advisable to keep the soil moist. It is possible to pour water 1 time in the morning and in the evening. Remember to stop at noon. Watering. At the same time, the weeds should be covered with weeds and the thickness of the grass cover should be 3 to 5 cm in order to reduce moisture loss and keep the soil moist.
Timely prevention of pests and diseases. During Chinese cabbage cabbage, it is necessary to pay attention to the regular inspection of the leaves, found that there is downy mildew, soft rot and other hazards, it is necessary to use 40% aluminum phosphate wettable powder 200 to 300 times the initial stage of the disease, 50% Rui Poison Mn-Zn 500 to 600 times solution, or 50% methicone wettable powder 600 to 800 times liquid, 7 to 8 days spray 1, continuous control 2 to 3 times.
Spray foliar fertilizer in time. During the Chinese cabbage bulb phase, 800-fold vegetable-specific high-performance organic humic acid active liquid fertilizer, or 0.3% urea mixed with 0.3% potassium dihydrogen phosphate may be sprayed once every 7-10 days. Liquid, even spray 2 to 3 times, evenly spray the wet leaves, can effectively promote the cabbage's heart.
Set the shade net. After the sowing of Cabernet Sauvignon Cabbage, silver-gray or black shading nets are installed on the front slope of the greenhouse, which can significantly reduce the temperature in the greenhouse and contribute to the cabbage's heart.
Find out the cause
Cause cabbage is not covered, mostly due to the following causes, one is excessive use of nitrogen fertilizer, and some vegetable farmers partial application of available nitrogen fertilizer, rather than pay attention to the application of phosphorus and potassium fertilizer, resulting in the lack of phosphorus and potassium fertilizer, making cabbage not package Heart or loose heart. The second is uneven water supply. In summer, due to higher temperatures, Chinese cabbage grows rapidly and requires a large amount of water. If it is not timely and evenly watered, it is very easy to cause cabbage not to contain the heart. Third, there is a lot of rain and humidity. In summer, due to frequent rainfall, the humidity of the Chinese cabbage field is relatively large, which affects the growth of Chinese cabbage. It is also easy to produce Chinese cabbage without worry. Fourth, improper control of pests and diseases, summer cabbage pests and diseases occur more serious, especially soft rot disease, dry heart disease, downy mildew, powdery mildew, virus disease, aphids, cabbage caterpillars, etc., the occurrence of these diseases and diseases to a certain extent affect the Cabbage grows, causing Chinese cabbage not to worry.
Accurate prevention
Rational fertilization. In Chinese cabbage, it is necessary to pay attention to increasing phosphorus and potassium fertilizers and organic fertilizers, and to control nitrogen fertilizers so as to restrain their growth. Generally, in the early stage of ball-bearing and the mid-balloon stage, a three-component compound fertilizer should be applied. Each time, the application rate should be 10 to 15 kilograms per acre, and the water should be flushed with water.
Science watering. In Chinese cabbage, it is necessary to maintain a uniform and sufficient supply of water. Avoid frequent seasons to prevent it from becoming wet when it is dry. It is advisable to keep the soil moist. It is possible to pour water 1 time in the morning and in the evening. Remember to stop at noon. Watering. At the same time, the weeds should be covered with weeds and the thickness of the grass cover should be 3 to 5 cm in order to reduce moisture loss and keep the soil moist.
Timely prevention of pests and diseases. During Chinese cabbage cabbage, it is necessary to pay attention to the regular inspection of the leaves, found that there is downy mildew, soft rot and other hazards, it is necessary to use 40% aluminum phosphate wettable powder 200 to 300 times the initial stage of the disease, 50% Rui Poison Mn-Zn 500 to 600 times solution, or 50% methicone wettable powder 600 to 800 times liquid, 7 to 8 days spray 1, continuous control 2 to 3 times.
Spray foliar fertilizer in time. During the Chinese cabbage bulb phase, 800-fold vegetable-specific high-performance organic humic acid active liquid fertilizer, or 0.3% urea mixed with 0.3% potassium dihydrogen phosphate may be sprayed once every 7-10 days. Liquid, even spray 2 to 3 times, evenly spray the wet leaves, can effectively promote the cabbage's heart.
Set the shade net. After the sowing of Cabernet Sauvignon Cabbage, silver-gray or black shading nets are installed on the front slope of the greenhouse, which can significantly reduce the temperature in the greenhouse and contribute to the cabbage's heart.
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