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Common fertilizers for the production of green food
Green food is a safe, high-quality, nutritive food that is pollution-free. Rational use of fertilizers is an important part of the production of green foods. The use of fertilizers must be limited to the environment and crops without adverse consequences, do not allow the accumulation of harmful substances in products to limit the impact on human health, and return a sufficient amount of organic matter to the soil. , Increase the biological cycle of biological systems to maintain and increase soil organic matter content and biological activity, so as to reduce pollution, increase soil fertility, and form a benign ecological cycle. 1. Organic Fertilizer Organic fertilizer refers to farmyard manure, which contains large amounts of biological matter, animal and plant residues, excrement, biological waste, and other substances. Applying organic fertilizer can not only provide comprehensive nutrition for crops, but also has long-term fertilizer effect and can increase and renew soil organic matter. Promoting microbial reproduction, improving soil physical and chemical properties and biological activity is the main source of nutrients for green food production. Compost is organic fertilizer made from various types of orange stalks, leaves, grass, animal and plant residues, human and animal dung as raw materials, and a small amount of soil mixed and accumulated. The raw materials used for manure and manure are basically the same as those for compost, except that it is fermented under flooding conditions. Boiler refers to the fertilizer made from the excrement of pigs, cattle, horses, sheep, chickens, ducks and other livestock and poultry and straw hoppers. Biogas fertilizer In a sealed biogas digester, organic matter decomposes to produce by-products of biogas, including biogas liquids and residues. Green manure uses cultivated or wild green plants as fertilizer. Such as leguminous mung bean, broad beans, grass hibiscus, tianjing, wolfberry, wolfberry fruit and so on. Non-legume green manures include ryegrass, radishes, small sunflower seeds, azolla, water hyacinths, and water peanuts. Crop straws Crop straws are one of the most important organic fertilizers. The nutrient elements necessary for crop straws to contain crops include N, P, K, Ca, and s. Under appropriate conditions, through the action of soil microorganisms, these elements are mineralized and returned to the soil for absorption and utilization by the crop. Cake rapeseed cake, cottonseed cake, bean cake, sesame cake, castor cake, tea seed cake, etc. Mud is not contaminated river mud, pond mud, gully mud, mud, lake mud and so on. Second, microbial fertilizers It refers to the use of specific microbial strains cultured with active microbial preparations. It is non-toxic, harmless, and does not pollute the environment. Through the vitality of specific microorganisms, it can increase plant nutrition or produce phytohormones and promote plant growth. According to microbial fertilizers to improve plant nutrient elements, can be divided into the following categories. Rhizobium fertilizer can form root nodules on the roots of legumes, can assimilate nitrogen in the air, improve nitrogen nutrition of legumes, and have rhizobial agents such as peanuts, soybeans, and mung beans. Nitrogen-fixing bacteria can fix nitrogen in the air in the soil and in the rhizosphere of many crops to provide nitrogen nutrition to crops, and also secrete hormones to stimulate crop growth, such as autotrophic nitrogen-fixing bacteria and combined nitrogen-fixing bacteria. Phosphorus bacterial fertilizers can convert insoluble phosphorus in soil into available phosphorus for crops and improve crop phosphorus nutrition. Phosphorus bacteria, phosphate-solubilizing fungi, mycorrhizal bacteria and so on. Silicate bacterial fertilizer can decompose mica, feldspar and other potassium-containing aluminosilicates and apatite in the soil, release potassium, phosphorus and other ash elements, and improve the plant's nutritional conditions. There are silicate bacteria, other potassium-releasing microorganisms. Complex bacteria fertilizers contain more than two kinds of beneficial microorganisms mentioned above. They do not antagonize each other and can increase the supply level of one or more nutrient elements in the crop, and contain physiologically active substances. Third, humic fertilizer refers to peat, lignite, Weathered coal and other fertilizers containing humic acids. Its structure is similar to soil humus. It can promote crop growth, early maturation, increase yield, and improve quality. Fourth, semi-organic fertilizer means fertilizer made by mixing or compounding organic and inorganic substances. Including: After detoxification of livestock and poultry manure, add appropriate amount of zinc, manganese, boron, aluminum and other trace elements made of fertilizer. Fermentation Waste Liquid Drying Compound Fertilizers Fermentation of dry materials from fermentation industry waste liquids is used in conjunction with fertilizers made from waste mixtures used to grow mushrooms or poultry. 5. Inorganic Fertilizers Minerals are made by physical or chemical industries. Nutrients are fertilizers formed from inorganic salts. Including mineral potassium and potassium sulfate, mineral phosphate fertilizer, calcined phosphate, limestone (limited to use in acidic soils). 6. Fertilizer with foliar fertilizer sprayed on plant leaves and can be absorbed and used by them. May contain a small amount of natural plant growth regulators, but does not contain chemically synthesized plant growth regulators, such as trace element fertilizers and plant growth aids such as microorganisms with humic acid, alginic acid, amino acids, vitamins, sugar and other elements production. 7. Other fertilizers include foods that do not contain synthetic additives, and organic by-products of the textile industry, such as: fertilizers composed of sawdust, shavings, wood waste, etc.; and fish residue, cattle wool waste, bone meal, and amino acids that contain no preservatives. Waste fertilizers made from organic materials such as residues, poultry and animal processing waste, and sugar factory waste.