Summer cabbage cultivation techniques

1, selection of high quality summer rain or drought, adverse growth and development of summer cabbage, select heat-resistant, disease-resistant, early maturing varieties are necessary. Should be selected under high temperature long-day conditions under the condition of tight ball, short-throwing stems do not significantly extend the resistance, the growth period of 45 to 55 days of the species.
2. The cultivated land is selected for lands with high topography, good drainage and irrigation conditions, and loose and fertile soil. Apply base fertilizer, high ridge cultivation. It is best to use garlic, onion, etc. to reduce the risk of viral diseases. Avoid neighboring or pre-planting with susceptible virus disease crops such as tomatoes. The summer cabbage has a short growth period and fast growth, and more organic fertilizer should be applied to improve the soil permeability and fertility retention.
3, timely sowing heat-resistant summer Chinese cabbage varieties of winter is relatively weak, early sowing can be easily sowing seedlings, while the smaller the ball; sowing date can not reach the purpose of increasing production and efficiency. Generally can be sowed in stages in May to July, in the ridge to open the planting ditch, determine the distance between planting sowing, 3300 ~ 3500 per mu is appropriate.
4. Diseases and Insect Pest Control Cabbage grown in summer is susceptible to soft rot, virus disease, aphids, cabbage caterpillars, diamondback moth, and leafhoppers. Prevention of viral diseases should strengthen watering and seedling protection, timely eradication and weeding, cutting off the route of transmission. Avoid aphid damage, attention to control soft rot in the ball stage, the liquid to be sprayed on the petiole and stem, found that diseased plants in a timely manner. Most heartburn diseases are caused by high temperature and drought, and fertilizer and water management should be strengthened.
5, fertilizer and water to promote early flushing Qi attack, a promotion in the end, do not slow seedlings. Top dressing should be done a few times. Usually in the seedling stage and after the appropriate amount of irrigation fertilization. At the beginning of the rosette stage and the early stage of the ball-bearing stage, apply bio-organic fertilizer on both sides of the ditch with appropriate amount of high-nitrogen compound fertilizer, and properly cultivate ridges and water them 1 or 2 times.