There are four advantages to the mixed application of chemical fertilizers and organic fertilizers. 1. Fertilizers such as superphosphate and trace elements can be used to increase fertilizers, which are then fixed in the soil and become ineffective after being applied to the soil. When used in combination with organic fertilizers, it reduces the contact surface with the soil and reduces the fixing of nutrients. Organic fertilizers can also increase the solubility of phosphate rock and are better under paddy conditions. Another example is that after mixing many fertilizers with organic fertilizers, fertilizers can be absorbed by organic fertilizers to reduce losses. In addition, organic fertilizer with organic fertilizer can also promote the maturity of organic fertilizer, improve fertilizer efficiency. Second, can reduce some of the unfavorable side effects that chemical fertilizers may produce. When applying large quantified fertilizers or unequal application of chemical fertilizers alone, the concentration of soil solution is high, affecting crop water absorption, and even injuring roots. If it is mixed with organic fertilizers, this will not happen. problem. In addition, if the physiological acid fertilizer is applied alone for a long period of time, the soil will become acid, and excessive active iron, active aluminum and other harmful substances will be generated, and the crop will be poisoned. In combination with organic fertilizers, soil buffering performance can be increased and soil acidification can be prevented. Another example is that some superphosphates contain too much free acid, which can affect seed germination and seedling growth when used as a seed fertilizer. Neutralization of free acid after adding organic fertilizer can reduce the damage to seeds. Third, can increase the nutrients contained in the crop nutrient organic fertilizer than the whole, fertilizer effect is stable and long, contains many organic matter, can increase soil organic matter content, improve soil physical and chemical properties. Not only can supply crops, but also can supply soil microorganisms with nitrogen, phosphorus, potassium and other nutrients, as well as vitamins and growth hormone. After the application of organic fertilizer, soil enzyme activity is enhanced, which is conducive to nutrient conversion. Such as organic fertilizer mixed with superphosphate or superphosphate magnesium fertilizer can promote the growth of aerobic bacteria in the soil, increase crop nitrogen nutrition. 4. When straws are returned to farmland and unfertilized organic fertilizers are used, the addition of chemical nitrogen fertilizer can avoid the slow supply of crops due to early nitrogen deficiency and affect the growth. Moreover, it is necessary to provide nitrate nitrogen and ammonium at the same time in the maturation stage of cereal crops. Nitrogen and organic fertilizers can do this. China Agricultural Network Editor
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