Soil improving agent based on montmorillonite modification and preparation method thereof

Abstract

The invention discloses a soil improving agent based on montmorillonite modification. The soil improving agent is prepared from 42-46 parts by weight of modified montmorillonite, 26-30 parts by weightof biomass fertilizer, 16-20 parts by weight of inorganic mineral soil, 14-18 parts by weight of natural humus soil, 4-6 parts by weight of a heavy metal adsorption promoter, 3-5 parts by weight of ammonium dihydrogen phosphate, 1-3 parts by weight of phosphate-dissolving bacteria, 1-2 parts by weight of nitrogen-fixing bacteria and 1-3 parts by weight of coptis root extract. The soil improving agent has complete functions, can provide rich nutrients, can adsorb heavy metals in soil, has improvement effects obviously higher than those of the prior art and has a high use value and a good application prospect.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a montmorillonite-based modified soil improver and a preparation method thereof. Background technique [0002] Soil is an important part of nature and is closely related to the sustainable development of the ecological environment. However, with the development of economy and society, the degree of unreasonable development and utilization of soil by humans is increasing, resulting in increasingly prominent problems of soil degradation. Soil improvers There are many types of minerals, mainly peat, lignite, weathered coal, lime, gypsum, vermiculite, bentonite, zeolite, perlite and sepiolite, etc.; natural and semi-synthetic water-soluble polymers, mainly straw, poly Sugar materials, cellulose materials, lignin materials and resin glue materials; synthetic polymer compounds, mainly polyacrylic acid, vinyl acetate maleic acid and polyvinyl alcohol; beneficial microbial prepa...

AI Technical Summary

Problems solved by technology

[0003] The existing soil conditioner has not complete functions and poor effect. The Chinese patent document "(Application No.: 201410447128.2)" discloses an environment-friendly soil conditioner and its preparation method, which is made of kaolinite from the following raw materials 1- 5 parts, 1-5 parts of vermiculite, 1-5 parts of bentonite, 1-5 parts of zeolite, 0.5-1 part of hydromica, 10-20 parts of municipal domestic sludge, 1000-2000 parts of urban domestic sewage treatment plant effluent, the The literature simply mixes the raw materials and uses conventional raw materials. Although the physical and chemical properties of the soil can be improved, the effect is not very significant. Method, the acidic soil improver is composed of waste tobacco leaf ash, carbonized flue-cured tobacco stalks, carbonized corn stalks, silicon potassium fertilizer, and bentonite, and is made by crushing, mixing and granulating, and the mass percentage of its components is: waste tobacco leaf ash 5-15%, carbonized flue-cured tobacco stalks 30-40%, carbonized corn stalks 25-35%, silicon and potassium fertilizer 10-20%, bentonite 5-10%, the literature does not yet have the ability to absorb heavy metals in the soil