Phosphate fertilizer synergist, preparation method of phosphate fertilizer synergist, phosphate fertilizer synergist powder and phosphate fertilizer

Abstract

The invention provides a phosphate fertilizer synergist, a preparation method of the phosphate fertilizer synergist, a phosphate fertilizer synergist powder and a phosphate fertilizer. The phosphate fertilizer synergist is prepared from wood vinegar, organic acid and / or organic acid salt and water, wherein the content of wood vinegar is 5-95%, preferably, 15-85%, more preferably, 25-75%, and the most preferably, 35-65%; the content of organic acid and / or organic acid salt is 0.5-50%, preferably, 5-45%, more preferably, 10-40%, and the most preferably, 10-30%; the content of water is 0-94.5%, preferably, 0-80%, more preferably, 0-65%, and the most preferably, 5-55%. The phosphate fertilizer synergist can be applied to soil directly and can also be applied after being mixed with the phosphate fertilizer, so that immobile phosphorous in the soil and the phosphate fertilizer is activated, and poorly-soluble inorganic phosphorus compounds are absorbed and utilized by crops. Besides, all components of the phosphate fertilizer synergist are selected from natural products, and thus the phosphate fertilizer synergist is friendly to the soil environment and can increase the utilization rate of the phosphate fertilizer.

Description

technical field [0001] The invention relates to a phosphate fertilizer synergist and a preparation method thereof, phosphate fertilizer synergist powder and phosphate fertilizer, belonging to the field of fertilizers. Background technique [0002] Because the Chinese people have a lot of land and little land, in order to ensure grain production, they will adopt a high-input, high-yield planting model. The use of chemical fertilizers, especially nitrogen fertilizers, by farmers is seriously excessive. At present, the average annual amount of pure nitrogen in my country is 200kg / ha. In economically developed areas such as the Taihu Lake Basin, the annual amount of pure nitrogen applied is more than 600kg / ha, and in many areas the amount of pure nitrogen used is even as high as 1300kg / ha. Due to the long-term single application of nitrogen fertilizer, the ratio of nitrogen and phosphorus in the soil is out of balance, the soil is compacted and its physical and chemical propert...

AI Technical Summary

Problems solved by technology

But soluble phosphorus is in acidic soil (PH6.5), phosphorus element and calcium ion and magnesium ion form Phosphates are insoluble in water, so phosphorus is highly ineffective, resulting in low concentrations of soluble phosphorus in the soil and low in-season utilization of phosphorus fertilizers by crops

[0004] Chinese patent CN102584385A provides a preparation method of anti-aging long-acting multifunctional phosphate fertilizer. By adding medium and trace elements in the production of phosphate fertilizer, water-soluble phosphate is converted into weakly acid-soluble phosphate. This method starts from the perspective of reducing the solubility of phosphate fertilizer. Reduces the water solubility of phosphate fertilizers. Although it can reduce the loss of water-soluble phosphorus, it cannot make the use of adsorbed phosphorus and mineral phosphorus.

Due to the use of sulfur, this method has higher requirements for operational safety. In addition, because molten sulfur is easily oxidized to sulfur dioxide, it has higher requirements for environmental protection facilities.

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