Pickle prolonged-effect-time compound fertilizer and preparation method thereof

Abstract

The invention discloses a pickle prolonged-effect-time compound fertilizer and a preparation method thereof. The pickle prolonged-effect-time compound fertilizer includes nitrogen fertilizer, phosphate fertilizer, potash fertilizer, urease inhibitor, nitrification inhibitor and fertilizer synergist, wherein the total mass fraction of the nitrogen fertilizer, the phosphate fertilizer and the potash fertilizer is not lower than 96%; the preparation method of the pickle prolonged-effect-time compound fertilizer includes the steps as follows: smashing urea to powder so as to btain urea powder; adding water for fully dissolving borax, thiourea, dicyandiamide and polyaspartic acid to obtain a mixed solution; spraying all the mixed solution into the urea powder and then mixing with calcium superphosphate and potassium chloride to obtain a mixture; adding a binder; and granulating the mixture and then drying so as to obtain products. The pickle prolonged-effect-time compound fertilizer has high utilization rate, long fertilizer effect time, using safety and lower relative cost, can meet primary fertilizer application of the pickle, and can obviously reduce the convent of nitrate in the pickle.

Description

Technical field [0001] The present invention involves a mustard long -effect compound fertilizer, especially involving a mustard long -effect compound fertilizer and its preparation methods that can achieve one -time fertilization and reduce the content of beard. Background technique [0002] At present, long -acting compound fertilizers are compound fertilizers produced by controlling agent production through envelope technology or adding agent production in ordinary compound fertilizers. The advantage is that the fertilizer period is long and the nutrient utilization rate is high., Little in actual application.On the other hand, the addition of the compound fertilizer production process does not change the compound fertilizer production process, the control release effect is good, can be founded at one time, and the research and application are relatively large, but the current control and release compound fertilizer has several problems. One is the high production cost.For exa...

AI Technical Summary

Problems solved by technology

[0002] At present, long-acting compound fertilizers are compound fertilizers produced by coating technology or adding controlled-release agents to ordinary compound fertilizers. The rate is high; the disadvantage is that the production process of the coating technology is complicated, the residue is large, and the practical application is less

On the other hand, adding controlled-release agents does not change the production process of compound fertilizers. The controlled-release effect is good, and it can be applied at one time. There are relatively many researches and applications. However, there are several problems in the current controlled-release compound fertilizers. First, the production cost is high. For example, the price of compound fertilizer produced by n-butylthiophosphoric triamide is several times that of urea, and it is difficult to popularize and apply it on a large scale. Second, it has high toxicity and side effects, such as hydroquinone, which can kill humans and animals if 5 g is consumed, so it is not suitable for use; The third is that different crops have different fertilizer absorption rules, and the soil characteristics of different regions are different. A controlled-release fertilizer cannot be used in all crops and regions.