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What management can improve the quality and yield of Chinese cabbage planted in summer?
Under the condition of sufficient base fertilizer in the field, topdressing is not needed before Chinese cabbage is granulated. If the field is not good, not only sufficient nitrogen fertilizer should be applied, but also more potassium fertilizer should be applied. Mixed watering of urea and compound fertilizer after topdressing can meet the characteristics of large water demand in Chinese cabbage granulation stage and promote the rapid absorption and utilization of nutrients. In the nodulation period, sufficient water can also prevent the occurrence of dry heartburn of cabbage, but it is not suitable to use water in the field, and try not to irrigate with big water to prevent diseases. Before harvesting, watering should be reduced or stopped to ensure quality and storability; In case of rainy days, drainage should be done in time.
Chinese cabbage is sown directly in summer, not by seedling. The sowing amount is about 200 grams per mu, and the planting density requires 40-50 cm row spacing and 30-40 cm plant spacing, and about 3,000-4,000 plants are planted per mu.
During the growth period of Chinese cabbage in summer, we should prevent bad weather, such as high temperature, rainy or little rain. Therefore, it is necessary to drain the soil and fix the roots in time after the rainstorm. At the same time, the potassium dihydrogen phosphate solution should be spray-dried to promote the growth of leaves and watered to dry in time.
Chinese cabbage has shallow roots and weak absorption capacity, so it should be supplemented with fertilizer and water continuously during its growth. Fertilize in time after planting to promote the recovery of seedlings; Secondly, the concentration and dosage of topdressing should increase with the individual growth of Chinese cabbage. As for the fertilization method, cycle and dosage, it depends on the weather, seedling situation, soil and so on. Combination of watering and topdressing. Do not be short of water for 3~5 days after planting, especially in summer and early autumn, and water it for 3~4 days every morning and evening after planting.
The cultivation of Chinese cabbage should be based on organic fertilizer, appropriate application of chemical fertilizer during the growth period, combined with foliar topdressing and sprinkler irrigation. For example, sugar alcohol chelated calcium foliar fertilizer is a kind of fertilizer with good calcium supplement effect on Chinese cabbage.
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