The organic fertilizer and chemical fertilizer are used together to complement each other, but if the compatibility is unreasonable, both will lose and cause damage. What we need to know today is how to mix organic fertilizer with chemical fertilizer. Magnesium sulfate monohydrate white particles

1. Benefits of mixed application of organic fertilizer and chemical fertilizer

1.1 Learn from each other's strong points to make up for their weak points. The nutrient of soil fertility fertilizer is single, high in content, fast in fertilizer effect, but short in duration; Organic fertilizer has complete nutrients and lasting fertilizer effect, which can improve soil and fertility. The combination of the two can learn from each other, comprehensively supply the nutrients needed for crop growth, promote the healthy growth of crops, and improve the yield benefit.

1.2 Preserve nutrients and reduce loss. The chemical fertilizer dissolves quickly and has high solubility. After being applied to the soil, the concentration of soil solution will increase quickly, causing high osmotic pressure, affecting the absorption of nutrients and water by crops, and increasing the chance of nutrient loss. The mixed use of organic fertilizer and chemical fertilizer can overcome the disadvantage of steep increase of soil solution. At the same time, organic fertilizer can improve the nutrient absorption conditions of crops, improve the soil water storage and fertilizer retention capacity, prevent and reduce the loss of chemical fertilizer nutrients, and improve the utilization rate of chemical fertilizer.

1.3 Reduce nutrient fixation, improve fertilizer efficiency After chemical fertilizer is applied to the soil, some nutrients will be absorbed by the soil, chelated or fixed, reducing fertilizer efficiency. For example, when superphosphate and calcium magnesium phosphate fertilizer are directly applied to the soil, they are easy to combine with iron, aluminum, calcium and other elements in the soil, forming insoluble phosphate and being fixed, causing loss of effective nutrients. If mixed with organic fertilizer, it can not only reduce the contact surface with the soil, reduce the fixed opportunities between the soil and fertilizer, but also transform the insoluble phosphorus in the phosphorus fertilizer into effective phosphorus that can be used by crops, and improve the fertilizer efficiency of phosphorus fertilizer.

1.4 Improving soil structure and promoting continuous yield increase Long term single application of chemical fertilizer will destroy the soil aggregate structure, cause the soil to become sticky and harden, and reduce the farming performance and fertilizer supply performance. Organic fertilizer contains rich organic matter, which can activate loose soil and reduce capacity; It can improve the physical and chemical properties of soil such as water, fertilizer, gas and heat; Adjust the pH value. The mixture of the two can not only increase the yield, but also promote the sustainable development of agriculture.

1.5 Promote microbial activity and increase soil nutrients. Organic fertilizer is the energy source for microbial life, and chemical fertilizer is the inorganic nutrient for microbial growth. The mixture of the two promotes microbial activity, thus promoting the decomposition of organic fertilizer, producing a large amount of carbon dioxide and organic acids, which helps to dissolve insoluble nutrients in the soil and supply them to crops for absorption. Carbon dioxide can increase the carbon nutrition of crops and improve photosynthetic efficiency. Microbes have a short life. After death, they decompose and release nutrients for crops to absorb.

2. Organic fertilizer and chemical fertilizer suitable for mixed application

2.1 The manure, compost and calcium superphosphate or calcium magnesium phosphate fertilizer are mixed with each other. The application of calcium superphosphate and calcium magnesium phosphate fertilizer after the manure, compost, compost and mixed compost will not only reduce the contact surface between phosphate fertilizer and soil, but also prevent phosphate ions from being fixed by the soil. Moreover, various organic acids generated from the decomposition of organic fertilizers can promote the release of phosphorus fixed by the soil for the absorption of crops. The fertilizer efficiency can be increased by one third.

2.2 The manure and compost are mixed with ammonium bicarbonate and urea. 0.5%~1% ammonium bicarbonate (or acid) and human excrement and urine are added to the manure and compost, which is conducive to microbial propagation and activity, promotes the maturity of organic fertilizer and the release of various nutrients, and provides rich nutrients for crops.

2.3 The content of ammonium carbonate in human feces and urine mixed with calcium superphosphate or calcium magnesium phosphate fertilizer is too high, which is easy to volatilize and lose when applied alone. When applied together with calcium superphosphate or calcium magnesium phosphate fertilizer, ammonium dihydrogen phosphate with stable properties can be formed through chemical reaction, which not only reduces nitrogen loss in human feces urea, but also increases phosphorus nutrition. The fertilizer effect will be greatly increased if phosphorus is used to maintain nitrogen.

2.4 Mixed application of human excrement and ferrous sulfate Add 0.5% ferrous sulfate in human excrement and urine, which can convert the volatile ammonium carbonate in human excrement and urine into stable ammonium sulfate, playing the role of fertilizer preservation and deodorization, and preventing the loss of nitrogen volatilization.

3. Farmyard manure and chemical fertilizer unsuitable for mixed application

3.1 Uncooked farmyard manure cannot be mixed with nitrate nitrogen fertilizer. If it is mixed, the denitrifying bacteria in farmyard manure will cause denitrification of nitrate nitrogen fertilizer, generate nitrite, cause nitrogen loss and reduce crop quality.

3.2 The plant ash cannot be mixed with nitrogen fertilizer. The plant ash is alkaline fertilizer. If it is mixed with acid nitrogen fertilizers such as ammonia nitrogen and nitrate nitrogen, neutralization and decomposition reaction will occur, releasing ammonia volatilization, causing nitrogen loss and reducing fertilizer efficiency.

3.3 The plant ash cannot be mixed with calcium superphosphate. The plant ash contains more calcium. If it is mixed with calcium superphosphate, it will generate insoluble calcium phosphate, which will fix phosphorus and prevent the crops from directly absorbing and utilizing it.

3.4 The plant ash cannot be mixed with the manure, compost and human excrement. The plant ash is generally used as potassium fertilizer, which is alkaline. If it is mixed with the manure, compost and human excrement, it will accelerate the volatilization loss of nitrogen in the form of ammonia.