Reasonably fertilize tomato away from umbilical rot
Tomato umbilical rot is a physiological necrosis of the umbilicus cells in the process of fruit enlargement. The necrotic sites increase with the enlargement of the fruit, and then the rot grows molds and forms black rot-like diseased lumps. This is what folks often call " Black plaster." The cause of UAE is calcium deficiency in the body, because calcium is an important component of the plasma membrane and cell wall of tomato cells. To grow tomato fields, if the soil nutrients lack of calcium, it may induce UAE.
There are several reasons for the lack of calcium in tomatoes:
First, some soils themselves lack calcium elements. For example, acidic soils have a low calcium content and the chance of developing tomato umbilical rot is higher.
Second, some soils contain calcium, and may also exhibit inhibitory symptoms of calcium deficiency. Sometimes tomatoes in the concentrated fruit setting period experience continuous high temperature and drought, and the soil is seriously deficient in water, and it is difficult for tomatoes to absorb calcium fertilizer from the soil; What type of fertilizer, a large amount of fertilizer, will increase the concentration of soil solution, the tomato living in such soil, due to the physiological loss of water through the role of reverse osmosis, the root system is difficult to absorb to calcium, making it passive calcium deficiency.
In order to increase the yield and quality of tomato and ensure the increase of production and efficiency, it is necessary to improve the fertilization technology and optimize the level of formula fertilization.
First of all, the formula was reused as base fertilizer. Tomatoes are prosperous, roots are developed, results are numerous, results are longer, and the demand for fertilizers is greater. It is necessary to invest more fertilizer to achieve high yields and quality. In general, 3000-4000 kg of fully-fertilized organic fertilizer should be applied per acre, and 25 kg of superphosphate, 10 kg of potash, 100-150 kg of organic fertilizer, or 50-80 kg of organic compound fertilizer should be applied. Should be deep in the preparation of land, not to spread.
Second, see Miao fertilizer in time. One is to lightly apply the first fertilizer, the other is to re-apply fruit fertilizer, and the third is to supplement the fruit fertilizer. To prevent madness, after transplanting and planting to the early flowering stage, thin manure urine is used to raise the seedlings 1 or 2 times, about 800 kilograms per mu; the second time when the fruit has walnuts, top dressing is applied again, every 7 ~ 10 days once, apply 30% to 40% of the concentration of human and animal dung 1500 kilograms per acre, and apply superphosphate and potassium fertilizer 5 kilograms each; fruit harvesting period but also make up 1 to 2 times the concentration of 50% About 1,500 kilograms of human excrement to help enhance stamina, to make up for the fall season, increase production.
Third, spray fertilization outside the root. Tomato leaves have strong fertilizer absorption function. In the field of acid soil, after the initial results, 1% to 1.5% of superphosphate or 0.4% of calcium chloride solution is sprayed 1-2 times. At the same time, attention should be paid to timely drainage and irrigation so that water can be used to regulate fertilizer and maximize the effect of fertilization.
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