Fertilizers commonly used in green vegetable cultivation can be classified into organic fertilizers, biological fertilizers, and chemical fertilizers. Organic vegetables are prohibited by the use of synthetic chemical fertilizers, and organic fertilizers and biological fertilizers are advocated. Green vegetables and pollution-free vegetables allow the proper use of chemical fertilizers, but fertilizers should be used in conjunction with organic fertilizers to improve soil, improve fertility, reduce pollution, and reduce costs. To produce green and environmentally friendly vegetables, in order to reduce pollution to the environment and products, the base fertilizer should be mainly used for fertilization, supplemented by topdressing; the type of fertilization should be based on organic fertilizer, supplemented by other fertilizers, green vegetables and pollution-free vegetables. Synthetic fertilizers, fertilizers only make up for the lack of nutrients in organic fertilizers; the use of synthetic fertilizers should also be based on compound fertilizers, supplemented by single-element fertilizers. Since both biological fertilizers and chemical fertilizers are commercial fertilizers and various products are introduced, they will not be described here. Organic fertilizer is a general term for fertilizers that contain more organic matter and are derived from animal and plant residues and wastes such as human and animal waste. It is the main source of fertilizer for vegetables. Organic fertilizers are rich in organic matter and various nutrients such as cellulose, hemicellulose, fat, protein, amino acids, hormones and humic acids. It has the effect of improving soil and fertilizing soil. The humus in the organic fertilizer can form agglomerate structure in the soil, improve the aeration of the soil, and improve the water retention and fertilizer retention capacity of the soil. The application of organic fertilizers can promote the proliferation of beneficial microorganisms in the soil, and convert the phosphorus, potassium and trace elements that are difficult to use in the soil into effective nutrients that can be utilized by crops. It can also antagonize the activities of harmful microorganisms in the soil and improve the resistance of crops. However, organic fertilizer has the disadvantages of dirty, odorous, unsanitary, low nutrient content, slow fertilizer efficiency, large volume, heavy weight, and inconvenient transportation and use. We specially manufacture and export Permanent Magnetic, You may also find other Permanent Magnetic Chuck, Permanent Magnetic Lifter etc. Permanent Magnetic Permanent Magnetic, Permanent Magnetic Chuck, Permanent Magnetic Lifter China-Base Ningbo Foreign Trade Co.,Ltd , http://www.cbnb-magnets.com
Total 1 | <First <Prev 1 Next> Last> |
share to: