Method for preparing organic manganese fertilizer for engineering wound soil remediation and organic manganese fertilizer prepared

Abstract

A method for preparing an organic manganese fertilizer for engineering wound soil remediation includes a step of: effectively compounding chitin oligosaccharide or/and wormcast or/and silkworm excrement, water or/and hydrogen peroxide, an organic manganese element solution, polysorbate and sodium carboxymethyl cellulose under certain conditions. The present invention has significant effects on improving physical and chemical properties of engineering wound soil, enhancing availability of manganese element in the soil, preventing plants from physiological diseases caused by lack of manganese, and promoting growth and development of the plants.

Claims

1. A method for preparing an organic manganese fertilizer for engineering wound soil remediation, comprising steps of: (1) adding at least one member selected from a group consisting of chitin oligosaccharide, wormcast and silkworm excrement, with a weight percentage of 35%-65%, into a reaction kettle; then adding at least one member selected from a group consisting of water and hydrogen peroxide, with a weight percentage of 35%-65%, into the reaction kettle for dissolution; stirring at 30-90° C. for 0.3-2 hours, and obtaining a sample 1; (2) adding at least one member selected from a group consisting of mercaptoacetic acid, glutamic acid and citric acid, with a weight percentage of 10%-40%, into the reaction kettle; dissolving by water with a weight percentage of 15%-40%; then adding at least one member selected from a group consisting of hydrogen peroxide, ethyl alcohol and triethanolamine, with a weight percentage of 0.5%-9.5%, into the reaction kettle for dissolution; stirring at 30-90° C. for 0.3-2 hours; adding manganese sulfate with a weight percentage of 30%-70% into the reaction kettle; boiling at 90-130° C. for 0.5-4 hours, and obtaining a sample 2; and (3) compounding the sample 1, the sample 2, polysorbate and sodium carboxymethyl cellulose respectively with weight percentages of 5%-35%, 60%-95%, 0-3% and 0-2%, and obtaining a final product.

Description

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

(1) The present invention will be further illustrated with preferred embodiments.

First Preferred Embodiment

(2) Adding chitin oligosaccharide with a weight percentage of 50% into a reaction kettle; then adding water with a weight percentage of 50% into the reaction kettle for dissolution; stirring at 80° C. for 0.3 hours, and obtaining a chitin oligosaccharide solution. Adding mercaptoacetic acid with a weight percentage of 25% into the reaction kettle; dissolving by water with a weight percentage of 30%; then adding hydrogen peroxide with a weight percentage of 5% into the reaction kettle for dissolution; stirring at 80° C. for 0.3 hours; adding manganese sulfate with a weight percentage of 40% into the reaction kettle; boiling at 100° C. for 0.5 hours, and obtaining an organic manganese element solution. Compounding the chitin oligosaccharide solution, the organic manganese element solution, polysorbate and sodium carboxymethyl cellulose respectively with weight percentages of 9%, 89%, 0.8% and 1.2%; and, obtaining a final product.

(3) The obtained organic manganese fertilizer of the present invention was applied in engineering wound soil remediation, and a vegetation recovery comparative experiment was carried out by using Festuca arundinacea. The comparative experiment showed that: compared with Foliwell manganese fertilizer (developed by Omex Agrifluids Ltd., England) and a control group without manganese fertilizer, the organic manganese fertilizer of the present invention can promote the growth and development of Festuca arundinacea, significantly increase the chlorophyll content of Festuca arundinacea, and decrease the proportion of grey-speck seedlings caused by manganese deficiency of Festuca arundinacea, thereby achieving a good vegetation recovery effect (see Table 1).

(4) TABLE-US-00001 TABLE 1 Influence of organic manganese fertilizer of present invention on growth and development of Festuca arundinacea in engineering wounds Grey-speck Plant Chlorophyll seedling Vegetation height content proportion coverage Treatment (cm) (mg/cm.sup.2) (%) (%) Control group without 98 0.026 71.3 90 manganese fertilizer Commercial 103 0.035 30.1 95 manganese fertilizer (Foliwell manganese fertilizer) Organic manganese 112 0.046 8.6 100 fertilizer of present invention

Second Preferred Embodiment

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