Stabilized fertilizer and preparation method thereof

Abstract

The invention provides a stabilized fertilizer and a preparation method thereof. The stabilized fertilizer disclosed by the invention comprises fertilizer inner core particles and external coating film materials coating the outer surfaces of the fertilizer inner core particles; a material of the fertilizer inner core particles comprises the following raw materials in parts by weight: 35 to 50 parts of urea, 30 to 40 parts of potassium chloride, 10 to 25 parts of monoammonium phosphate, 1.0 to 2.0 parts of cyanoguanidine, 2.0 to 4.0 parts of humic acid powder and 2.5 to 8.0 parts of attapulgite; the external coating film materials comprise kaolin layers attached to the outer surfaces of the fertilizer inner core particles, paraffin layers attached to the outer surfaces of the kaolin layersand talcum powder layers attached to the outer surfaces of the paraffin layers. The stabilized fertilizer provided by the invention is applicable to implement synchronous carryout of rice transplanting and fertilization in a synchronous rice transplanting and fertilizing machine, and has the advantages of a high nutrient utilization rate, low cost, smooth surfaces of the fertilizer particles, difficulty in breakage, difficulty in moisture absorption, no caking and the like.

Description

technical field [0001] The invention relates to the technical field of agricultural production, in particular to a stable fertilizer and a preparation method thereof. Background technique [0002] With the improvement of the level of agricultural mechanization in our country, the area of ​​mechanized fertilization in the rice planting process is also increasing year by year. At present, the synchronous transplanting and fertilization equipment equipped with fertilization device on the basis of rice transplanter has been applied in many places in the southern rice farming area. The transplanting and fertilization equipment using the side deep fertilization method can improve the fertilizer utilization efficiency and save labor while achieving precise fertilization. put in. [0003] When farmers use rice simultaneous transplanting and fertilizing machines, they configure a wide variety of fertilizers, including various simple fertilizers, common rice-specific blended fertiliz...

AI Technical Summary

Problems solved by technology

[0003] When farmers use rice simultaneous transplanting and fertilizing machines, they configure a wide variety of fertilizers, including various simple fertilizers, common rice-specific blended fertilizers or formula fertilizers on the market, and various slow-release or stable fertilizers. There are different degrees of application disadvantages

[0004] The nutrient utilization rate of traditional nitrogen, phosphorus and potassium compound fertilizers or compound fertilizers is low, especially after nitrogen nutrients are applied, they cannot be maintained for a long time. Traditional compound fertilizers on rice usually require three to four times of fertilization. Subsequent increase in labor costs for farmers, nutrient loss is also likely to cause agricultural non-point source pollution

[0005] Existing coated controlled-release fertilizers or slow-release fertilizer products usually include sulfur, synthetic resin or other polymer compounds as coating materials, and the cost of coating is relatively high, so it is not suitable for application on low value-added food crops, and its Nutrient release rate is difficult to adapt to rice growth nutrient demand curve

[0006] When the existing blended slow-release BB fertilizer or stable fertilizer product is applied on rice simultaneous transplanting and fertilizing equipment, there are problems such as moisture absorption and adhesion, uneven fertilizer particles, and more fertilizer dust, which is very easy to block the fertilizer discharge pipe. Causes problems such as unsmooth fertilizer discharge and uneven fertilizer discharge between different fertilizer discharge pipes. In actual production, farmers need to clean the fertilizer discharge pipes frequently, which reduces work efficiency and greatly restricts farmers' application.

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