Summer cabbage planting technology
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2, Shizujifei, appropriate sowing. After harvesting wheat, it is necessary to skim to the wheat stubble. Each 667m2 plot is made up of 3,000 to 4,000 kilograms of decomposed manure, 10 kilograms of potassium sulphate and superphosphate, and ground leveled to create a high ridge with a height of about 10 cm and a width of about 50 cm. . In the ridges, shallow burrows are planted at a distance of 25 to 30 cm. If they can be covered with a black visor net after sowing, the emergence rate can be increased. If the land is lagging late, it can be nursed with nutrients 15 to 20 days in advance. The suitable sowing date for summer cabbage is mid-June.
3. Strengthen field management. After the emergence of seedlings and time, fill the seedlings, leave large seedlings, strong seedlings to weak seedlings, hybrid seedlings and seedlings. The seedlings started from the cross period and gradually increased the distance between the seedlings. When the cabbages were planted (5 to 6 leaves), they were seeded. Seedling watering control 3 water seedlings 5 ​​water will be planted, during the emergence of 3 water poured mainly to protect the cooling effect, the 4th and 5th water for the seedling water and Dingmiao water. After cultivating or cultivating in time after rain. In combination with Dingmiao water topdressing 1 tree fat, with 2 kg of urea per 667m 2 , or with 15 kg of ammonium sulfate applied or ditch applied and covered. The point of fertilization should be 8 to 10 cm away from the plants and less damage to the root leaves. Summer cabbage wrapped in water 10 times before 15 days permeate, seedlings after cultivating, the growth center from the outer leaf to the leaf ball, when the observed thick cabbage leaves thickening color, side leaves were green, the seedlings end. When irrigating the seedlings, the headwaters are chased again with one-time fertility. The types and amounts of fertilization are the same as that of the tree-fertilizers. The fertilizer is preferably applied with water. During the whole growing season of summer cabbage, the quality of watering has a great influence on its yield and quality. Water shortage can cause convulsions and result in a decline in yield. Therefore, we must pay special attention to maintaining adequate soil moisture during summer cabbage cabbage, watering on the surface when it is white, until the stop 5 to 7 days before harvest, this is the key to the harvest of summer cabbage. The main diseases are soft rot and viral diseases. The main pests are cabbage caterpillars and aphids. In addition to chemical control, the water does not flood the stem base when watering, and the colonization density is not too great, which can reduce the occurrence of diseases.