Organic-inorganic compound fertilizers are superior to isotrophic NPK inorganic compound fertilizers. In addition to inorganic nutrients, organic-inorganic compound fertilizers also contain a certain proportion of organic substances, trace elements and physiologically active substances. Through the principle of adsorption and substitution of organic substance macromolecular compounds, nutrients such as nitrogen, phosphorus and potassium are adsorbed. It is slowly released during the growth period of the crop, so that the organic-inorganic compound fertilizer has both the quick-acting effect of inorganic fertilizer and the long-acting effect of organic fertilizer, and the organic combination of the two is better realized, and the fertilizer can be satisfied by the bottom of the fertilizer. The demand for nutrients throughout the growing period of crops is also important for covering agriculture, farming and mechanization.
Since the fertilizer utilization rate of organic-inorganic compound fertilizer is greatly improved, the utilization ratio of organic-inorganic compound fertilizer is higher than that of nutrient nitrogen-phosphorus-potassium compound fertilizer by more than 20%, which is related to its own fertilizer supply characteristics. Compared with the same amount of inorganic compound fertilizer, the organic matter content of organic-inorganic compound fertilizer is about 40%~50%, and the inorganic nutrient content is increased by 20%, combined with the action of other trace elements and active ingredients. , thereby increasing the fertilizer utilization rate. But for this reason, the product is higher in cost than the NPK compound fertilizer. When selecting organic and inorganic compound fertilizers, users should not only look at the price between the two, but should fully consider the comprehensive fertilizer efficiency of organic and inorganic compound fertilizers. Organic and inorganic compound fertilizers are outstanding in the comprehensive effects of soil improvement, water saving and drought resistance, increasing production and increasing efficiency, improving fertilizer utilization rate, environmental protection and improving agricultural product quality, and many years of practice have also proved that many organic and inorganic compound fertilizers The fertilizer effect shows an increase of about 10%. However, the use of any fertilizer should follow the principle of moderateness. The dosage of organic-inorganic compound fertilizer is generally 50-80 kg/mu. The fertilization dose should be determined according to soil fertility, yield level and crop type.