Tomato umbilical rot is the process of fruit swell, umbilical cells undergo physiological necrosis, the necrotic parts increase with the expansion of the fruit, followed by saprophytic mold, forming a black rot-like disease, which is commonly known as the folk Black plaster." The reason for the formation of umbilical rot is calcium deficiency in the body, because calcium is an important component of the plasma membrane and cell wall of tomato. In the field of planting tomato, if the soil nutrient lacks calcium, it may induce umbilical rot.
There are several reasons for calcium deficiency in tomatoes:
First, some soils lack calcium elements. For example, acidic soils contain low levels of calcium, and the incidence of tomato umbilical rot is higher.
Second, some soils contain calcium, and may also have inhibitory calcium deficiency symptoms. Sometimes tomatoes are concentrated in fruit setting, encounter continuous high temperature and drought, soil is seriously deficient in water, and tomato is difficult to absorb calcium fertilizer from soil; What type of fertilizer, too much fertilizer, will increase the concentration of soil solution. Tomatoes living in such soils, due to physiological water loss due to reverse osmosis, roots are difficult to absorb calcium, making it passive calcium deficiency.
In order to improve the yield and quality of tomatoes and ensure the increase in production and efficiency, it is necessary to improve the fertilization technology and optimize the level of formula fertilization.
First, the formula is re-applied to the base fertilizer. Tomato grows vigorously, the root system is developed, the result is many, the result period is longer, the demand for fertilizer is larger, and more fertilizer must be invested to achieve high yield and quality. Generally, 3,000 to 4,000 kilograms of fully decomposed organic fertilizer should be applied per acre, and 25 kilograms of calcium phosphate, 10 kilograms of potassium fertilizer, or 100 to 150 kilograms of biological organic fertilizer, or 50 to 80 kilograms of biological organic compound fertilizer should be applied. It should be applied deep during the preparation of the land, and should not be applied.
Secondly, look at the seedlings in time. One is to apply the first flower fertilizer lightly, the second is to apply the fruit fertilizer, and the third is to apply the fertilizer. In order to prevent madness, after transplanting and planting to the initial flowering stage, use the thin human excrement to apply the seedling fertilizer 1 or 2 times, about 800 kg per mu; the second time, when the fruit has walnuts, apply the top dressing every 7 ～10 days, each ar can apply 30%～40% concentration of human and animal waste 1500kg, and apply 5kg of calcium phosphate and potassium fertilizer respectively; the fruit harvesting period should be supplemented 1~2 times concentration is 50% The human excrement of 1500 kg or so, in order to enhance the stamina, to supplement the summer, improve production.
Third, spray the fertilizer outside the root. Tomato leaves have a strong function of sucking fertilizer. In the field of acid soil, after the initial results, 1% to 1.5% of superphosphate or 0.4% calcium chloride solution should be sprayed 1 or 2 times. At the same time, pay attention to timely drainage and irrigation, so as to adjust the fertilizer with water to maximize the effect of fertilization.
There are several reasons for calcium deficiency in tomatoes:
First, some soils lack calcium elements. For example, acidic soils contain low levels of calcium, and the incidence of tomato umbilical rot is higher.
Second, some soils contain calcium, and may also have inhibitory calcium deficiency symptoms. Sometimes tomatoes are concentrated in fruit setting, encounter continuous high temperature and drought, soil is seriously deficient in water, and tomato is difficult to absorb calcium fertilizer from soil; What type of fertilizer, too much fertilizer, will increase the concentration of soil solution. Tomatoes living in such soils, due to physiological water loss due to reverse osmosis, roots are difficult to absorb calcium, making it passive calcium deficiency.
In order to improve the yield and quality of tomatoes and ensure the increase in production and efficiency, it is necessary to improve the fertilization technology and optimize the level of formula fertilization.
First, the formula is re-applied to the base fertilizer. Tomato grows vigorously, the root system is developed, the result is many, the result period is longer, the demand for fertilizer is larger, and more fertilizer must be invested to achieve high yield and quality. Generally, 3,000 to 4,000 kilograms of fully decomposed organic fertilizer should be applied per acre, and 25 kilograms of calcium phosphate, 10 kilograms of potassium fertilizer, or 100 to 150 kilograms of biological organic fertilizer, or 50 to 80 kilograms of biological organic compound fertilizer should be applied. It should be applied deep during the preparation of the land, and should not be applied.
Secondly, look at the seedlings in time. One is to apply the first flower fertilizer lightly, the second is to apply the fruit fertilizer, and the third is to apply the fertilizer. In order to prevent madness, after transplanting and planting to the initial flowering stage, use the thin human excrement to apply the seedling fertilizer 1 or 2 times, about 800 kg per mu; the second time, when the fruit has walnuts, apply the top dressing every 7 ～10 days, each ar can apply 30%～40% concentration of human and animal waste 1500kg, and apply 5kg of calcium phosphate and potassium fertilizer respectively; the fruit harvesting period should be supplemented 1~2 times concentration is 50% The human excrement of 1500 kg or so, in order to enhance the stamina, to supplement the summer, improve production.
Third, spray the fertilizer outside the root. Tomato leaves have a strong function of sucking fertilizer. In the field of acid soil, after the initial results, 1% to 1.5% of superphosphate or 0.4% calcium chloride solution should be sprayed 1 or 2 times. At the same time, pay attention to timely drainage and irrigation, so as to adjust the fertilizer with water to maximize the effect of fertilization.
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