Nutritional Characteristics and Fertilization Technology of Tomatoes
Tomatoes are solanaceous vegetables, most of which are of infinite growth type, ie budding, flowering, fruiting, harvesting. As nutrients are continuously carried along with the fruits of tomatoes, they need to be harvested and supply nutrients to meet the need for continuous flowering. Therefore, there is often a habit of fertilizing fruits at the edge of the harvest. The introduction of Entec stability fertilizer reduces tomatoes. The tedious fertilization. Among the elements of nitrogen, phosphorus, potassium, calcium, and magnesium, the absorption of potassium by tomatoes is the largest, and the cumulative absorption is close to twice that of nitrogen, and the absorption during the fruit expansion period accounts for more than 70% of the total absorption. In the vegetative growth period, 70% of the potassium is concentrated in the leaves, and 60% of the potassium is distributed in the fruit during the fruiting period. Therefore, the potassium deficiency in the tomato leaves is mainly manifested after fruit enlargement, resulting in poor coloration of the back of the tomatoes during harvest. In order to avoid affecting the yield and quality of tomatoes due to potassium deficiency, it is very important to topically apply potassium fertilizer during the fruit enlargement period, and potassium sulfate works best. Under protected cultivation conditions, the requirements of tomatoes for nitrogen, phosphorus and potassium are greater than those for open cultivation. Studies have shown that, under protected cultivation conditions, nitrogen is required to produce 3.86 kilograms per 1,000 kilograms of tomatoes, 1.15 kilograms of phosphorus, 4.44 kilograms of potassium, and 1.0 kilogram of magnesium.
Nutrient deficiency is often caused by insufficient supply of nutrients. In the absence of nitrogen, the plants grew slowly. The old leaves were yellow-green in the initial stage. The whole plant was pale green in the later stage. The leaves were small and upright. The veins changed from yellowish green to deep purple, the stems became hard, the fruits became small and the yield was low. In the absence of phosphorus, the early leaves were purple-red at the early stage, brown spots appeared on the leaves, and the leaves were stiff. The tip of the leaves showed dark brown and died, and the veins gradually turned purple. In the absence of potassium, the leaf tissue between the main veins of the leaves faded green and the leaves curled red green; when severe, burns occurred along the leaf margins. The symptoms of potassium deficiency first appeared on the old leaves, and the fruit was unevenly colored. To meet the nutritional requirements of tomatoes, we can use high-potency formula of ENTEC's long-lasting compound fertilizer, apply 50 kg/mu in transplanting during transplanting, cover the soil after transplanting, and coat every 6 weeks after seedlings are transplanted. 20 kg/mu, or after each fruit-picking, encore 5 kg/mu, can get high yield and high quality returns. Entec fertilizer is reduced by 20% to 30% compared to conventional fertilizers. While increasing production, it also improves the uniformity of tomatoes and evens the color of the fruits. From 2006 to 2008, the increased yield of Entek multi-demonstrate demonstration was between 10% and 30%, and its yield-enhancing effect was approved by vegetable growers. When a large number of N, P, and K elements are properly supplemented, the lack of trace elements in calcium, boron, and zinc occurs in some tomato growing areas, and trace element fertilizers can be used for foliar spray prevention. Such as calcium deficiency caused by tomato ridge rot, tomatoes can be sprayed after fruiting Kangpu Gaimei for prevention and correction; lack of boron caused by fruit wrinkles, the application of borax during transplanting or foliar spraying Kombo liquid boron; Zinc deficiency caused by lobular disease can be prevented at the seedling stage by applying zinc sulfate and foliar spray of Kangpu Suspended Zinc. In order to promote the growth of early tomato roots and shorten the seedling period of transplanted seedlings, the tomato seedlings can be treated with Keppke roots (or spray) before transplanting. After spraying for 2 weeks, the leaves can be sprayed once more. Improve tomato growth and lay the foundation for high yields.
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