Coal gangue based soil conditioner for greening tree planting in saline-alkali soil

Abstract

The invention discloses a coal gangue based soil conditioner for greening tree planting in saline-alkali soil. The technical scheme is characterized in that preparation materials comprise coal ganguecompressed nutrient soil, coal gangue carbonized soil, acidized zeolite particles, acidized straw, flue gas desulfurized gypsum, humic acid, powdery water retaining and slowly-release fertilizer for the saline-alkali soil, attapulgite clay, ferrous sulfate and water; the preparation materials are stirred and mixed uniformly and packaged into the coal gangue based soil conditioner for greening treeplanting in the saline-alkali soil. Calcium ions and magnesium ions contained in the soil conditioner can substitute for sodium ions in saline-alkali soil colloids, so that content of exchangeable sodium ions of the soil is reduced, degree of alkalization of the soil is reduced, fertility of the saline-alkali soil can be improved obviously, content of organic matter, calcium, magnesium, silicon,sulfur, nitrogen, phosphorus and potassium in the saline-alkali soil is increased, the saline-alkali soil is improved, the survival rate of planted greening trees is increased, and the coal gangue based soil conditioner for greening tree planting in the saline-alkali soil is applicable to improvement of the saline-alkali soil and greening tree planting in the saline-alkali soil.

Description

technical field [0001] The invention relates to a soil conditioner, in particular to a soil conditioner for greening and planting trees on coal gangue saline-alkali land. Background technique [0002] Saline-alkali land means that the salt contained in the soil affects the normal growth of crops. Plants in severe saline-alkali soil areas can hardly survive. Soluble salts reduce the ability of plants to absorb water and nutrients, relatively reduce the content of soil organic matter, seriously lack nitrogen, phosphorus, potassium and trace elements, seriously damage the soil aggregate structure, reduce air permeability, and reduce the activity of aerobic microorganisms , slow soil maturation, resulting in soil compaction. Due to salinization, the physical and chemical properties of the soil deteriorate, and the living conditions of plants deteriorate. The work of greening and tree planting in saline-alkali soil is very difficult, and the survival rate of greening and plantin...

AI Technical Summary

Problems solved by technology

[0008] The deficiencies of the above patents are: (1) the "nutrient soil" lacks ingredients for saline-alkali resistance and pH adjustment of saline-alkali land; It can be used in ordinary "original soil greening", but not suitable for "indigenous soil greening in saline-alkali land". In the process of greening and planting trees in saline-alkali land, the survival rate of seedlings is relatively low

[0010] The disadvantages of the above-mentioned patents are: (1) a large amount of sulfur powder (20% to 35%) has been selected in the ingredients. It is a low-toxic hazardous chemical, but the sulfur dioxide produced by its steam and sulfur combustion is highly toxic to the human body, so it is not suitable for saline-alkali soil conditioners

(2) Although "bentonite" is selected in the ingredients, those skilled in the art know that the pH value of sodium-based bentonite is generally 8.5-10.2, and that of calcium-based bentonite is generally 6.9-8.5. "Bentonite" is an alkaline soil. Therefore, "bentonite" has not been acidified and modified, and it is not suitable for soil conditioners in saline-alkali land