The nutrients needed for various crops are not the same, but the characteristics of different varieties of fertilizers are also different. According to the fertilizer absorption characteristics of crops and the appropriate application of chemical fertilizers to the soil properties, not only can the fertilizer effect be fully utilized, but also the production cost can be reduced and high yields can be obtained. First, the response of different crops to nitrogen fertilizer In order to reduce the loss of nitrogen fertilizers, ammonium nitrogen fertilizer should be used for cultivated rice, especially ammonium chloride and urea. Corn, wheat and other cereal crops are equally effective with ammonium nitrogen fertilizers (such as ammonium bicarbonate, ammonium sulfate, ammonium chloride, urea) or nitrate nitrogen fertilizers (such as ammonium nitrate). Potato and sweet potato are also suitable for ammonium nitrogen fertilizer. Ammonium nitrate can improve the quality of tobacco, and ammonium nitrogen can help the flammability of tobacco. Chlorine-containing fertilizers (such as ammonium chloride), however, reduce the flammability of tobacco and should be avoided. In addition, different crops have different requirements for nitrogen. Leafy crops such as leafy vegetables and tea leaves require more nitrogen fertilizer for crops to be harvested. Legume crops only need to apply a small amount of nitrogen fertilizer when the root nodule has not functioned in the early stages of childbirth. Summer in northern China is hot and rainy, and the application of ammonium nitrogen fertilizer can reduce the loss. In the saline-alkali soil areas, it is not suitable to purchase and use ammonium chloride with more chloride ions, so as not to increase soil salt. In alkaline soils, ammonium nitrate fertilizers are absorbed and utilized by crops, but it is necessary to prevent the decomposition and volatilization of ammonium niger. Second, the response of different crops to phosphorus Legume crops (soybeans, peanuts), sugar crops (beet, sugar cane), fiber crops, potato crops (potatoes, sweet potatoes), and melons and fruit trees require more phosphorus, and the application of phosphate fertilizers has a better fertilizer effect. General calcium phosphate and heavy superphosphate are water-soluble phosphate fertilizers, which are easily absorbed and utilized by crops. "Heavy calcium" has a higher content of available phosphorus, which is 2 to 3 times that of "precursor calcium". The amount of heavy calcium can be reduced by referring to the amount of "precursor calcium". Seasonal crops can only absorb and utilize a small part of the applied P fertilizer. Most of them are left in the soil, and they can also show an increase in yield for the crops under the crop. Therefore, it is not necessary to apply phosphate fertilizers in successive years in plots where there is a large amount of phosphorus, so as to avoid waste. Third, the response of different crops to potash fertilizer All crops containing more carbohydrates, such as tobacco, potatoes, sweet potatoes, sugar beets, watermelons, fruit trees, etc., require large quantities of potassium, so they are said to be hi potassium crops. However, these potassium-promoting crops are free from chlorine. If potassium chloride is applied to these potassium-salt boiled crops, chloride ions will inevitably lead to a drop in yield and quality. Potassium chloride is also not suitable for long-term application on saline-alkali land. Base fertilizers and topdressing can be used on non-chlorinated crops, but it is not suitable for seed fertilizers. Potassium sulfate is suitable for all kinds of soil and crops and can be used as base fertilizer, seed fertilizer, topdressing fertilizer and top dressing fertilizer. Dongguan Anmeixuan Electronic Technology Co., Ltd , https://www.hyashine.com