Method for preparing organic complex microelement fertilizer for engineering wound soil remediation and microelement fertilizer prepared

Abstract

A method for preparing an organic complex microelement fertilizer for engineering wound soil remediation includes compounding chitosan oligosaccharide or/and earthworm dung or/and silkworm sand, water or/and hydrogen peroxide, an organic complex trace element solution, polyethylene glycol octyl phenyl ether, and polysorbate under certain conditions. The present invention can significantly improve physical and chemical properties of engineering wounds, enhance effectiveness of trace elements in soil, and prevent plant physiological diseases due to lack of trace elements, and promote plant growth and development.

Claims

1. A method for preparing an organic complex microelement fertilizer for engineering wound soil remediation, comprising steps of: (1) putting 30 wt %-70 wt % material A into a reaction kettle, wherein the material A is selected from a group consisting of chitosan oligosaccharide, earthworm dung and silkworm sand; and adding 30 wt %-70 wt % material B for dissolution, wherein the material B is selected from a group consisting of water and hydrogen peroxide; then stirring at 30-90° C. for 0.3-2 hours to obtain a sample 1; (2) putting 15 wt %-40 wt % material C into the reaction kettle, wherein the material C is selected from a group consisting of tartaric acid, humic acid, lysine and thioglycolic acid; and adding 30 wt %-65 wt % material D for dissolution, wherein the material D is selected from a group consisting of water and hydrogen peroxide; then adding 5 wt %-35 wt % material E for dissolution, wherein the material E is selected from a group consisting of acetamide, diglycolamine, urea and ethanolamine; and stirring at 30-90° C. for 0.2-3 hours to obtain a sample 2; (3) adding 10 wt %-40 wt % borax, 10 wt %-40 wt % zinc sulfate, 10 wt %-40 wt % ferrous sulfate, 5 wt %-35 wt % copper sulfate, 1 wt %-30 wt % manganese sulfate, 0.5 wt %-15 wt % ammonium molybdate in the reaction kettle, and adding 25 wt %-60 wt % the sample 2, then complexing at 75-130° C. for 0.5-5 hours to obtain a sample 3; and (4) compounding 5 wt %-25 wt % the sample 1, 70 wt %-90 wt % the sample 3, 0 wt %-5 wt % polyethylene glycol octyl phenyl ether, and 0 wt %-6 wt % polysorbate to obtain a final product.

2. An organic complex microelement fertilizer for engineering wound soil remediation, comprising: a sample 1, a sample 3, polyethylene glycol octyl phenyl ether and polysorbate; wherein the sample 1 comprises a material A and a material B, wherein the material A is selected from a group consisting of chitosan oligosaccharide, earthworm dung and silkworm sand, and the material B is selected from a group consisting of water and hydrogen peroxide; the sample 3 comprises a material C, a material D, a material E, borax, zinc sulfate, ferrous sulfate, copper sulfate, manganese sulfate and ammonium molybdate, wherein the material C is selected from a group consisting of tartaric acid, humic acid, lysine and thioglycolic acid, the material D is selected from a group consisting of water and hydrogen peroxide, and the material E is selected from a group consisting of acetamide, diglycolamine, urea and ethanolamine.

Description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(1) Referring to embodiments, the present invention will be further illustrated.

Embodiment 1

(2) Putting 50 wt % chitosan oligosaccharide into a reaction kettle, and adding 50 wt % water for dissolution, then stirring at 80° C. for 0.5 hours to obtain a chitosan oligosaccharide solution; putting 25 wt % tartaric acid into the reaction kettle, and adding a 40 wt % water for dissolution, then adding 35 wt % diglycolamine for dissolution, and stirring at 80° C. for 0.5 hours to obtain a tartaric acid mixed solution; adding 15 wt % borax, 13 wt % zinc sulfate, 10 wt % ferrous sulfate, 5 wt % copper sulfate, 5 wt % manganese sulfate, 2 wt % ammonium molybdate in the reaction kettle, and adding 50 wt % the tartaric acid mixed solution, then complexing at 100° C. for 1 hours to obtain an organic complex trace element solution; and compounding 10 wt % the chitosan oligosaccharide solution, 85 wt % the organic complex trace element solution, 2 wt % polyethylene glycol octyl phenyl ether, and 3 wt % polysorbate to obtain a final product.

(3) The obtained organic complex microelement fertilizer of the present invention was applied to engineering wound soil remediation, and vegetation restoration comparison experiment was carried out by using Elymus. The comparison experiment showed that compared with COMPO complex microelement fertilizer (developed by COMPO GmbH, Germany) and a control group without fertilizer, the organic complex microelement fertilizer of the present invention can promote the growth and development of Elymus and significantly increase the chlorophyll content of Elymus. The proportion of yellowing seedlings caused by iron deficiency of Elymus was reduced to achieve good vegetation recovery effect (see Table 1).

(4) TABLE-US-00001 TABLE 1 Effect of organic complex microelement fertilizer of the present invention on growth and development of Elymus in engineering wounds yellowing Plant Chlorophyll seedling Vegetation height content proportion coverage Treatment (cm) (mg/cm.sup.2) (%) (%) Control group without 85 0.031 63.2 91 fertilizer purchased complex 87 0.043 28.5 96 microelement fertilizer (COMPO complex microelement fertilizer) organic complex 90 0.059 6.3 100 microelement fertilizer of the present invention

Embodiment 2

(5) The procedure during preparation is the same as those in embodiment 1. However, type, quantity and dissolution temperature of the raw materials, stirring time, and complexation time are changed within the range specified by the operating procedure of the present invention. As a result, the organic complex microelement fertilizer for engineering wound soil remediation of the present invention is also prepared.