What should be paid attention to in the process of fertilizer application and mixing?

There are many problems worth paying attention to in the process of fertilizer application. Specifically, we should find out which fertilizers can be mixed and which can not be mixed. The mixed application of ammonium bicarbonate and calcium superphosphate can not only absorb nitrogen, phosphorus and other nutrient elements, but also neutralize part of the free acid in calcium superphosphate and eliminate its harm. However, it should be noted that the mixing ratio of the two should be appropriate, and the pH value should be kept from slightly acidic to neutral, not alkaline, otherwise the water-soluble phosphorus in superphosphate can be easily converted into insoluble phosphorus in alkaline environment, thus reducing the fertilizer efficiency. Some of the products produced by the mixture of ammonium nitrate and potassium chloride are ammonium chloride and potassium nitrate, which have better physical properties, less hygrolytic property and easier to use than ammonium nitrate. But it should not be released for a long time after mixing. Phosphate rock powder or calcium magnesium phosphate fertilizer and compost retting. It can promote the effect of phosphate fertilizer. The insoluble phosphate fertilizer can be transformed into soluble state due to the production of organic acid after the decomposition of organic matter in compost. Calcium superphosphate and ammonium nitrate should be mixed, or the free acid in calcium superphosphate should be neutralized with 10% to 20% phosphate rock powder or 5% plant ash, and then mixed. Urea mixed with potassium chloride or calcium superphosphate can be mixed with a small amount of dry barnyard manure or dry peat (50 kg for every 500 kg of fertilizer). Ammonium nitrogen fertilizer or manure should not be mixed with alkaline fertilizer (such as plant ash, calcium magnesium phosphate fertilizer, etc.), otherwise it is easy to cause nitrogen volatilization loss. Calcium superphosphate cannot be mixed with alkaline substances. Otherwise, it will turn soluble phosphoric acid into weakly soluble or insoluble phosphoric acid and reduce the availability of phosphorus. Nitrate nitrogen fertilizer should not be mixed with organic fertilizer, especially unmature organic fertilizer, because the five-carbon sugar in organic fertilizer is the most suitable nutrient for nitric acid reducing bacteria, which will promote the reduction of nitric acid and cause the loss of nitrogen volatilization.