What should we pay attention to when using chlorine-containing fertilizers?

I heard that chlorine-containing fertilizers make crops burn roots? So what should we pay attention to when using chlorine-containing fertilizers? Ask experienced netizens to help introduce that chlorinated chemical fertilizer in China is a kind of fertilizer with large production and application amount, but all kinds of crops have different sensitivity to chlorine. For example, some plants are very sensitive to chloride ions, when the amount of absorption reaches a certain extent, it will significantly affect the yield and quality, usually referred to as chlorine-avoiding plants. When there is more chloride ion, it is not conducive to the conversion of crop sugar into starch, the starch content of root and tuber crops will be reduced; chloride ion can promote the hydrolysis of carbohydrates, watermelons, sugar beets and grapes will reduce the sugar content; chloride ion will affect the flammability of tobacco, cigarettes are easy to flameout; chloride ion for a long time, often cause harm to the seedlings of sensitive crops. Therefore, the farming network has sorted out which crops can be used with chlorine-containing fertilizers and matters needing attention, which are listed in detail below for netizens' reference. Crops sensitive to chlorine-containing fertilizers are tobacco, sweet potato, potato, cabbage, pepper, lettuce, amaranth, apple, grape, tea, watermelon and so on. Crops that like chlorine fertilizer are: Rice, sorghum, millet, cotton, corn, wheat, peanuts, soybeans, tomatoes and so on. Precautions for the application of chlorine-containing fertilizers: first, avoid sensitive periods for sensitive crops and crops: because different crops and varieties have different sensitivity and tolerance to chlorine. Chlorine-sensitive crops are called chlorine-free crops, such as tobacco, tea, citrus, grape, watermelon, potato, Ziyunying, etc., generally do not apply or strictly control the amount of chlorine-containing fertilizer. Second, pay attention to the application method of chlorine-containing chemical fertilizer: when using chlorine-containing chemical fertilizer as base fertilizer, it should be applied early and deeply and cover the soil, usually one week before sowing or transplanting seedlings, on the lower side of seeds or seedlings, 5 cm from the topsoil. When topdressing: take point application or strip application, and the distance from the crop plant is 5-10 cm, do not spread fertilizer. Third, chlorine-containing fertilizers are applied in seasons and areas with more rainfall as far as possible: when chlorine-containing fertilizers are applied in rainy seasons or areas with more precipitation, chloride ions can be leached with water and are not easy to accumulate in the soil, so side effects on crops can be avoided. However, dry land without irrigation, saline-alkali land with poor drainage, high temperature and dry season, and areas with lack of water and little rain had better not use or use less chlorine-containing fertilizer. The function of agricultural magnesium nitrate what is the function of boron fertilizer?