Slow-release compound fertilizer and preparation method thereof

Abstract

The invention provides a slow-release compound fertilizer. The slow-release compound fertilizer comprises the following components: 1-4 parts of zeolite powder, 2-10 parts of rice husks, 2-8 parts ofactivated carbon powder, 30-50 parts of a compound fertilizer, 10-20 parts of a coating material, 1-3 parts of a bacteriostatic agent, 1-4 parts of a binder, 1-6 parts of an emulsifier, and 2-5 partsof a water retention agent, wherein the compound fertilizer is composed of the following materials: 8-12 parts of urea, 6-10 parts of ammonium nitrate, 3-6 parts of calcium nitrate, 2-5 parts of calcium phosphate, 6-10 parts of potassium dihydrogen phosphate, and 5-7 parts of dipotassium hydrogen phosphate; the bacteriostatic agent is one of euphorbia hirtapowder and litsea cubeba powder; and a mass ratio of the zeolite powder to the rice husks to the activated carbon powder is 3:7:4. The slow-release compound fertilizer provided by the invention has the advantages of an adjustable nutrient ratio, remarkable effects of slow release and yield increasing, and antibacterial water-retention functions, and can solve the technical problems that a slow-release effect of a compound fertilizer in the prior art is not ideal and a function is single; and the production process of the slow-release compound fertilizer is simple and has better demonstration and promotion effects.

Description

technical field [0001] The invention relates to the field of compound fertilizers, in particular to a slow-release compound fertilizer. Background technique [0002] One of the most important tasks in the current development of the fertilizer industry is to increase the utilization rate of fertilizers, especially nitrogen fertilizers. There are many ways to increase the utilization rate of chemical fertilizers. From an agricultural point of view, the utilization rate of chemical fertilizers can also be increased through multiple fertilization and other agronomic measures. However, with the development of modern economy and agriculture, such measures are becoming more and more unsuitable. development needs. Therefore, improving the utilization rate of chemical fertilizers is mainly achieved by improving the characteristics of chemical fertilizers themselves. [0003] Slow-release fertilizer technology is one of the main measures to improve the utilization rate of nitrogen f...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a slow-release compound fertilizer, which has a reasonable and adjustable nutrient ratio, a significant effect of slow-release production increase, and has antibacterial and water-retaining functions, which can solve the unsatisfactory slow-release effect of compound fertilizers in the prior art and the single-function technology question

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