Why greenhouse pepper tomato wilted

The problem of sudden wilting and death of peppers and tomatoes is most likely to occur in three types of greenhouse vegetables: one is greenhouses where vegetables are continuously grown for many years, one is greenhouses where vegetables are used for fertilizers for many years, and the other is over-fertilization of vegetables. Greenhouse. In the sheds where young vegetables, especially those of the same kind, grow, they are prone to troubles. The use of chemical fertilizers in successive years, especially for a single species of fertilizer, is prone to salt accumulation in the soil. Excessive fertilization makes soil salinization easier.椐 The relevant scientific research department determined that greenhouses were planted with vegetables in the first year and the soil nutrient concentration was about 2000 ml/kg. After 4-5 years, the soil nutrient concentration increased by 6500 mg/kg. In such a concentration range, vegetables absorb water for fertilizers. Obstacles will occur and reverse osmosis will occur. The root hair cell protoplasm in the root will lose water and die.

In addition, in the application of bio-organic compound fertilizers, excessive application may also cause wilting and dead vegetables in greenhouses. Especially in the high-temperature environment, ammonia gas is most likely to be generated during the decomposition of organic fertilizers. When the concentration of ammonia in the air in the greenhouse reaches 0.1-0.8% or 5 mg/L, the vegetables will be harmed.

When vegetables in plastic greenhouses are exposed to the reverse osmosis effect of poisonous gas and high nutrient concentration in the soil, the leaves of the vegetables first lose their green, burn-like, and then dehydrate and shrink from white to brown.

In order to produce more quality and pollution-free vegetables, effective comprehensive measures must be taken to prevent wilting and death of greenhouse vegetables. First, when selecting a greenhouse shed site, it is necessary to change locations each year to prevent heavy smashing, especially to avoid the pollution of industrial and mining enterprises that discharge exhaust gas; secondly, to use adequately decomposed organic fertilizers, 3,000 kilograms per mu, it is best to use merase enzymes. Organic compound fertilizer or fertilizer with fertilizer and other fertilizers, but the amount should not be too large, 75 kg per acre is appropriate; Third, the chemical fertilizer should be less applied, diligently applied, ditching or acupuncture, avoid ground applicator; four is When vegetables are mildly affected, (1) Ventilate and exhaust immediately, (2) Water is needed to reduce the concentration of soil-fertilizer solution; 5. Whenever a vegetable is found to have a damaged seed, Huimanfeng active liquid fertilizer is sprayed at a concentration of 800-1000 times. Spray it again 5-7 days.

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