As the saying goes, "a crop of flowers, all depends on the fat home." Scientific and rational fertilization can not only maintain the soil fertility of the vegetable field, but also improve crop yield, improve quality and enhance stress resistance. When farmers pay attention to the amount of fertilizer, the variety of fertilizers, the application method, the application period, and the fertilizer characteristics of crops, they are easy to cause fertilizer damage. If the nutrient concentration is too high, the total amount of fertilizer or organic fertilizer applied is too much, which exceeds the amount required by the crop. In the case of insufficient soil moisture, it is easy to cause the soil salt concentration to be too high, and the function of the crop to absorb nutrients and water. Obstructed, serious even the reverse flow of water in the cell, the phenomenon of reverse osmosis, resulting in dehydration of the root cells of the crop to produce fertilizer. Gas poisoning type fertilizer mainly refers to ammonia gas, nitrogen dioxide and sulfur dioxide gas poisoning. Most are caused by decomposition and volatilization of fertilizers. Nitrogen and organic fertilizers will evaporate ammonia, especially in low-temperature, alkaline soil environments. When the concentration of ammonia reaches a certain amount, acute damage will occur in the aboveground part of the crop, the mesophyll tissue will collapse, the chlorophyll will disintegrate, and spots or blocky dark brown spots will appear between the veins, causing the whole plant to die in severe cases. After applying a large amount of raw cake fertilizer and organic manure in the greenhouse, a large amount of hydrogen sulfide will be generated during the decomposition process, and further oxidation in the air to form sulfur dioxide will cause the mesophyll tissue to lose turgor and wilting. Salt Accumulation Fertilizer Due to the large amount of fertilization, some soluble salts in the soil will accumulate on the surface. The high content of salt on the surface will cause the root growth to be severely hindered. Some plots may not even be cultivated, and the phenomenon of plant dwarfing, leaf color black and green, and fruit growth is slow. The control measures should be based on the fertilizer requirements of the crop, the characteristics of soil fertilization and the effects of fertilizers. It should be measured before application and applied according to the concentration. Especially the nitrogen fertilizer can not be applied too much at one time, and the foliar application concentration should not be too high. You can apply organic fertilizer in moderation or choose a good bio-stimulant. Note that organic manure fertilizer must be fertilized before application, especially livestock manure, and it should be used in combination with chemical fertilizer after fermentation. In addition, it is also possible to add biological fertilizer. Biological bacterial fertilizer has the functions of nitrogen fixation, phosphorus dissolving, potassium dissolving, inhibiting plant rhizosphere pathogens, regulating the composition of soil microbial flora, improving soil ecological environment, reducing the occurrence of pests and diseases, and improving crop stress resistance. To use the correct fertilization method, do not apply fertilizer (especially nitrogen fertilizer) to the soil surface. The depth of fertilization should be 5-10 cm. When topdressing, keep an appropriate distance from the crop plants. Generally speaking, it should be about 10 cm from the root system, and it should be applied deep, and the soil should be covered immediately after topdressing. When the soil is too dry, it is necessary to fill the water in time to prevent rooting. When the fertilizer is sprayed on the foliage, the suitable concentration of various trace elements is generally 0.01% to 0.1%, and the large amount of elements is 0.3% to 1.5%. When applying fertilizer, the fertilizer and the seed should not be in direct contact, and the fertilizer should be kept ectopic, and the dosage should not be too large. It is also not possible to mix with ammonium bicarbonate, superphosphate, urea, lime nitrogen and other chemical fertilizers to avoid burning or burning seedlings. This article URL: How to deal with crop damage? How to reduce losses Zinc Acetate Anhydrous,Zinc Acetic Anhydrous,Acetic Zinc Anhydrous,Anhydrous Zinc Acetate Wuxi Yangshan Biochemical Co.,Ltd. , https://www.yangshanchem.com