1, determine the seeding rate: the average tomato seed contains 300 capsules per gram, according to the density of the planting, generally every 667 square meters of field use 20-30 grams. Seed bed can be sown 10-15 grams per square meter. If the seed germination rate is less than 85%, the sowing rate should also be increased appropriately.
2, determine the sowing date: According to the tomato planting season, climatic conditions, cultivation methods, nursery facilities and other factors taken into account to determine the appropriate sowing date. For example, in the open season in spring, the Beijing area is usually sown in mid-February until early March. In the open season cultivation in the autumn, sowing in late July to early August in the south of the Yangtze River, such as Shanghai and Nanjing, has the best effect, while the output in the eastern part of Sichuan is sown in early July. The output is also higher. In areas where there are serious diseases of tomatoes, the sowing date is appropriately postponed by 1 to 2 months, and then higher yields can also be obtained through measures such as dense planting, early picking of the hearts, and increase of fertilizer and water.
3, sowing methods: usually broadcast, drill and on demand. After sowing tomato seeds, the soil should be covered immediately, and fine soil should be used to cover the soil. Cover the thickness of about 0.8 ~ 1.0 cm, thin thickness should be consistent. After planting, use 8 grams of 50% carbendazim WP each time the seedlings are sown and spread on the bed with a thin layer of fine soil to prevent seedling damping-off. Winter and spring nursery beds need to cover the surface of the film. In summer and autumn, nursery beds need to be covered with shade nets or straw. When 70% of the seedlings grow in the top soil, the cover is removed.
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