Compound fertilizer synergist modified by oxidized graphene and preparation method of compound fertilizer synergist

Abstract

The invention belongs to the field of crop fertilizer and particularly relates to compound fertilizer synergist modified by oxidized graphene and a preparation method of the compound fertilizer synergist. The compound fertilizer synergist is prepared from, by weight, 70-80 parts of forestry and agricultural residues, 10-20 parts of a modifying agent, 0.5-1 part of a catalyst, 1-5 parts of stabilizer, 5-10 parts of cyclodextrin and 0.3-0.5 part of the oxidized graphene. The preparation method includes the steps that plasma illumination is utilized to conduct bombardment on the surfaces of forestry and agricultural residues, hydroxide radicals, carbanyl groups, carboxyl and other functional groups containing oxygen are introduced into the surfaces of the forestry and agricultural residues, then polymerization with water-soluble polymer modifier occurs under the action of high-field-intensity ultrasound waves, stable nanometer gel particles of three-dimensional network structures are formed, after modification with the oxidized graphene and cyclodextrin is completed, high adsorption, complexing power and a water-retaining property are achieved, nutrient elements in soil can be subjected to complexing, losing of fertilizer nutrients is reduced, the water retention and fertilizer retention performance of soil is improved, and the utilization rate of compound fertilizer can be remarkably raised. The compound fertilizer synergist has the advantages of being environmentally friendly, free of pollution, capable of raising the utilization rate of fertilizer and improving soil environment and the like.

Description

technical field [0001] The invention belongs to the field of crop fertilizers, in particular to a compound fertilizer synergist modified by graphene oxide and a preparation method thereof. Background technique [0002] my country is a country with a large agricultural development. The small area of ​​arable land and low grain output are the biggest problems facing my country's agricultural development. At present, the important means to increase grain output is the application of chemical fertilizers. my country is the largest producer and user of chemical fertilizers in the world. The annual amount of chemical fertilizer application accounts for 35% of the world's total, but the utilization rate of chemical fertilizers is less than 30%, which is far lower than that of developed countries. In order to improve fertilizer efficiency and fertilizer utilization rate, some new fertilizers are applied, such as compound fertilizers, slow and controlled release fertilizers, biologic...

AI Technical Summary

Problems solved by technology

[0006] In the above-mentioned patents, urease inhibitors and nitrification inhibitors are mostly used as the main components of fertilizer synergists to stabilize nitrogen fertilizer and improve fertilizer efficiency. However, since urease inhibitors and nitrification inhibitors are very easy to pollute water bodies, it is not suitable for long-term application, and the fertilizer effect is prolonged. The period is short, the synergistic effect on phosphorus and potassium fertilizers is not significant, and it is difficult to improve the comprehensive utilization rate of compound fertilizers