1. Choosing suitable varieties for wintering spinach cultivation is susceptible to winter and early spring low temperature. After the spring, the general varieties are easy to convulsion, reducing yield and quality. Therefore, wintering cultivation should use medium-ripening and late-maturing varieties with strong winter, long twitching, strong cold tolerance and high yield. Such as the choice of round leaf spinach, late round leaf spinach, Huasong No. 1, Liaoning round leaf spine and other varieties.
2. Selecting land for the base that meets the production conditions of pollution-free vegetables, choose leeward sun, soil loose and fertile, good drainage conditions, neutral and smiling acid soil. After the harvest of the former hoe, clean the garden in time, combine the ploughing of the land, and apply the base fertilizer, generally applying 4000-5000 kilograms of decomposed organic fertilizer per 666.7 square meters. The overgrown spinach has a long growing period. If the base fertilizer is insufficiently applied, the plant growth is weak before winter, which is not conducive to safe wintering. It is prone to premature convulsions when the growth is restored in the next year. The whole surface is flattened and made into a sorghum of 1.2 to 1.5 meters wide.
3. Appropriate sowing Seedling sowing sooner or later has a close relationship with seedling wintering ability, harvest time and yield. It should not be too early or too late. Spinach has 4 to 5 leaves best before freezing. Wintering spinach is sown in mid-to-late October and early November. At this time, the climate is cool, suitable for germination and emergence of spinach, generally do not need to broadcast germinated seeds, but to sow seeds and wet seeds. When the weather is dry at the time of sowing, the bauxite must be poured into the bottom water first. If the weather is humid, there is no need to pour the bottom water. After sowing, gently comb the topsoil so that the seeds fall into the soil joints, and then pour a layer of decomposed thick manure. Take care to keep the soil moist to the seedlings. If the planting is late and the temperature is low, the plastic film or shade net should be covered on the seedling hoe to promote the seedling, and the film is removed after emergence. The amount of seed used per 666.7 square meters is about 4 to 5 kilograms, and the amount of seeding for late sowing is appropriately increased.
4. Cultivation and management After cultivation, if the soil is dry, you can pour a small water to keep the soil moist. When 3 to 4 true leaves, you can properly control the water to promote root development for the benefit of wintering. If the seedlings are dense, 2 to 3 true leaves can be used once, and the seedling distance is 3 to 5 cm. In this period, water and fertilizer can be applied according to the condition of the seedlings and the weather, and the manure and urine of the decomposed people are mainly used to promote the growth of the seedlings. If a locust hazard occurs, it should be sprayed and prevented in time. In frost and snow and ice, pay attention to timely covering film and shade nets, floating cover and small arch shed cover. It should be noted that the wintering spinach cultivation base fertilizer should be applied, more organic fertilizer, less inorganic fertilizer. Because the sun is weak in winter, the leaves accumulate too much nitrate. For the wintering spinach of the seedlings, after the temperature rises in the spring, choose the sunny day to chase the decomposed and weak feces, promote the growth and tenderness, and prevent early convulsions.
5. Harvesting can be harvested in batches according to growth conditions and market demand, and can also be harvested separately. For the wintering spinach that will be harvested and listed, it is especially important to pay attention to cold and frost-proof coverage to avoid freezing the leaves, which seriously affects the commercial, yield and quality of spinach. In order to meet the needs of the market before and after the Spring Festival.
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