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Second, pay attention to the application method. When using chlorinated fertilizer as base fertilizer, it should be applied early and covered with soil. It should be applied one week before sowing or transplanting, and applied to the underside of seeds or seedlings, preferably 5~7 cm away from topsoil. For top dressing: take a point or strip application, and 5 to 10 cm away from the crop plants, avoid using it.
Third, try to apply in the seasons and areas with more rainfall. In the rainy season or in areas with high precipitation, the application of chlorinated fertilizers, chloride ions can be leached with water, and it is not easy to accumulate in the soil, thus avoiding side effects on crops. In dry land without irrigation conditions, saline-alkali land with poor drainage, high temperature and dry seasons, and areas with water shortage and low rainfall, it is better to use less or less chlorinated fertilizer.
First, avoid sensitive periods for sensitive crops and crops. The sensitivity and tolerance of chlorine to different crops and varieties vary widely. Chlorine-sensitive crops are called chlorine-repellent crops. There are tobacco, tea, citrus, grape, watermelon, potato, and milk vetch. Generally, the application of chlorinated fertilizer is not applied or strictly controlled.
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