Slow-release potassium sulfate fertilizer and preparation method thereof

Abstract

The invention belongs to the field of crop fertilizers, and in particular relates to a slow-release potassium sulfate fertilizer and a preparation method thereof. The preparation method of the slow-release potassium sulfate fertilizer mainly comprises the following steps: mixing and dissolving acrylic acid, acrylamide, a crosslinking agent and potassium sulfate, then adding an initiating agent to initiate free radical polymerization, then adding a load strengthening agent to form high-load slow-release potassium sulfate, then performing radiation treatment by using an NH3 plasma, and introducing amino groups for increasing the fertilizer efficiency of the fertilizer. Slow-release potassium sulfate disclosed by the invention has quick-acting and slow-release functions, a quick-acting part can be used for rapidly acting on crops and promoting the growth of the crops, and a slow-release part can perform slow release, so that the great loss of the potassium sulfate fertilizer in soil can be prevented, the utilization rate of the fertilizer can be improved, and the consumption of the fertilizer can be reduced. Meanwhile, the added amino groups can be used for increasing the fertilizer efficiency of the fertilizer, activating the roots of plants, promoting the absorption of crops to the fertilizer and improving the quality of products. The slow-release potassium sulfate fertilizer disclosed by the invention can be dissolved in water, is suitable for water-soluble fertilizers, is environment-friendly, cannot cause pollution, and has positive significance in promoting the increase of the crop yield.

Description

technical field [0001] The invention belongs to the field of fertilizers for crops, and more precisely relates to a slow-release potassium sulfate fertilizer that can be used for water-soluble fertilizers. Background technique [0002] my country is a country with a large population and agriculture. In order to meet the needs of human life, vigorously developing agriculture is an important measure for our country. Chemical fertilizers play an important role in increasing the yield of food crops. The amount of chemical fertilizers in my country has grown rapidly, and sales account for 20% to 30% of the world's total fertilizer consumption. However, the utilization rate of fertilizers in the current season is very low, and nitrogen fertilizer is only 30% to 35%. %, phosphate fertilizer is about 10%~20%, potash fertilizer is 35%~50%, which is 15%~20% lower than the world average. [0003] Potassium plays an important role in agriculture and is one of the three elements. Potass...

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Problems solved by technology

[0009] According to the above, the current slow-release potassium sulfate fertilizer in my country is mainly coated type, and the release rate of coated potassium sulfate is slow in the early stage of fertilizer effect, and nutrients cannot be absorbed and utilized by crops in time, which cannot meet the nutritional needs of crops, which is easy to cause Crop Deficiency Symptoms

Among them, there are also a small amount of polymer fertilizers, mainly inorganic fertilizer polymerization and inorganic organic polymerization. Inorganic polymerization has high nutritional content, but the surface of the fertilizer is easy to cause moisture absorption and agglomeration; inorganic organic polymerization can prevent fertilizer agglomeration to a certain extent, but The increase of its inorganic and organic molecular weight has caused a decrease in fertilizer content, which has a certain impact on the amount of fertilizer applied.

Moreover, the solubility of the coated type and the current polymer slow-release fertilizer in water is poor, and it is not suitable for the integration of water and fertilizer.