Compound fertilizer, preparation method and application thereof

Abstract

The invention provides compound fertilizer, a preparation method and application thereof and relates to the technical field of fertilizer. The compound fertilizer is mainly prepared from the following raw materials in parts by weight: 80 to 500 parts of basic nutrition fertilizer, 0.05 to 0.5 part of gamma-polyglutamic acid, 0 to 1.5 parts of biological enzyme and 0 to 0.8 part of carbon nanomaterial, wherein the basic nutrition fertilizer includes nitrogen fertilizer and potassium fertilizer, and a weight ratio of N to K2O is (10 to 30):(3 to 8). The compound fertilizer disclosed by the invention solves the problems of utilization rate reduction and environmental pollution caused by utilizing a lot of fertilizer; the compound fertilizer disclosed by the invention achieves the purpose of combining quick acting, long acting, synergism and water retention through interaction among the nitrogen fertilizer, the potassium fertilizer, gamma-polyglutamic acid, optional biological enzyme and optional carbon nanomaterial and has the effects of improving crop growth, increasing yield, improving quality and enhancing crop disease resistance.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a compound fertilizer, a preparation method and an application thereof. Background technique [0002] Compound fertilizer refers to chemical fertilizers containing two or more nutrient elements. Compound fertilizer has the advantages of high nutrient content, less auxiliary components and good physical properties. It is very important for balanced fertilization, improving fertilizer utilization rate, and promoting high and stable crop yields. role. [0003] The utilization rate of chemical fertilizers in my country is relatively low. The utilization rate of nitrogen in the current season is only 30%-35%, the utilization rate of phosphorus is 10%-25%, and the utilization rate of potassium is 35%-50%. The comprehensive average is 15% lower than that of developed countries- 20%, and the loss of nitrogen fertilizer alone is about 9 million tons per year. According to the measure...

AI Technical Summary

Problems solved by technology

[0004] Ordinary fertilizers have a short period of effectiveness, unreasonable nutrient distribution ratio, unscientific and unbalanced nutrient supply, especially the contradiction of nitrogen fertilizer is more prominent

At present, the contradiction between the rapid dissolution of chemical fertilizers and the slow absorption of crops has caused a large amount of nutrients to be leached with water, transformed into volatilization, and physically and chemically fixed, resulting in waste of fertilizers and limiting the effectiveness of fertilizers.

At the same time, the extensive use of chemical fertilizers also leads to the decline of utilization rate and the problems of environmental pollution

[0005] The area of ​​dry land in the world is relatively large, and the impact of drought on dry land agriculture is mainly manifested in the inconsistency between natural rainfall and water demand for crop growth. Therefore, how to encourage the soil to retain more rainwater for plants to "use as needed" is the main problem of water conservation in dry land. Water-retaining agent is an important water-absorbing and water-retaining chemical. It has been used in agriculture and forestry for many years. However, it is difficult to fully contact water-retaining agent and fertilizer. The effective effect of water-absorbing agent and fertilizer is limited, which affects the performance of fertilizer.

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