Key technologies for high yield and high quality fertilization of tomatoes

First, fertilization technology. The principle of high-yield fertilization is: first, base fertilizer, and second, top dressing to achieve "one control, two promotion, three spray, four bogey."
(1) Basal fertilizer should be reused for basal fertilization, generally yielding 5,000 kilograms of tomato per mu, 3000 kilograms of livestock manure per mu, 25-30 kilograms of superphosphate, and 20 kilograms of potassium chloride.
(B) a reasonable top dressing control: Tomato planting to fruit set before this period, in the top dressing technology should be used to control top dressing to see seedlings fertilizer. If the topdressing is too concentrated too early, the stems will have large leaves and dark green leaves, which will cause the plants to grow in length and even cause fruit drop. Therefore, in addition to the situation where the plant is severely deficient in fertilization, it is generally necessary to control topdressing. Two promotion: Tomato topdressing and harvesting period should be topdressing, promote growth and development. After the fruit of the first inflorescence and the walnuts of the fruit are large, the plants must be divided, the young fruit must be enlarged, and the flowering result must be continued. The nutrient consumption is large. At this time, the quick-acting fertilizer should be quickly applied 1-2 times to ensure that the plants are not De-fertilization promotes the rapid growth of young fruit. When the second third panicle grows rapidly, nutrients must be continuously supplied to meet the growing needs. Otherwise it will cause later de-fertilization, which will affect fruit development and cause premature plant failure. At this point, you should adopt the method of diligent chase. Generally, 10 kilograms of urea and 50 kg of plant ash are applied every 10 days in the sunny days. Three-spray: Tomatoes not only can absorb nutrients from the soil from the roots, but also can absorb mineral nutrients and sugars from the leaves to promote fruit and seed development. Therefore, during the fruit growth period, especially when the underground top dressing can be performed under the continuous continuous rain, two or three times of foliar spraying should be performed. The foliar spray fertilizer can use potassium dihydrogen phosphate 0.2-0.5% and urea 0.2-0.3% mixture liquid. Spraying, the effect is good. At the same time, in the flowering period, a 30 ppm boric acid solution can also be sprayed to increase the content of vitamin C and soluble solids in tomatoes so as to improve the quality of the tomato. Four bogey: Tomato top dressing, avoid high concentration of fertilizer, avoid wet soil top dressing, bogey at noon high temperature conditions top dressing, avoid too concentrated fertilizer. Fertilizer concentration is too high and too concentrated in fertilization, one tends to make the plant leggy, and the second is easy to produce fertilizer. Wet soil fertilization often causes physiological diseases such as falling flowers, fallen leaves and fruit drop. Fertilization under high temperature conditions, due to high soil temperature, large plant evaporation, fertilization will hinder the normal operation of the root system, causing plant death. Wet soil fertilization and fertilization under high temperature conditions can also easily cause bacterial wilt. Fertilization should be early morning or early evening.

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