Soil conditioner and preparation method thereof

Abstract

The invention provides a soil conditioner and a preparation method thereof. The soil conditioner comprises, by weight, 12 to 20 parts of plant ash, 5 to 10 parts of phosphorous slag, 5 to 9 parts of quicklime, 2 to 5 parts of zeolite, 2 to 5 parts of attapulgite, 1 to 3 parts of Yilong seaweed ooze, 2 to 5 parts of Chinese magnoliavine residues, 2 to 5 parts of large-flowered skullcap root residues, 20 to 30 parts of straw, 8 to 13 parts of hickory nut shells, 0.02 to 0.04 part of rotenone, 10 to 15 parts of mangosteen shells, 3 to 5 parts of an EM microbial agent, 7 to 20 parts of urea phosphate, 8 to 14 parts of urea, 10 to 15 parts of biochemical potassium fulvate and 9 to 12 parts of gamma-polyglutamic acid. The invention has the beneficial effects that the soil conditioner has high porosity and has specific adsorption effect on heavy metal ions; the soil conditioner can adjust the pH value of soil, is rich in trace elements and can elemental N, elemental P and elemental K at the same time; and the soil conditioner allows soil to maintain high porosity and to be long in fertility maintenance time and good in water retention performance.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a soil improver and a preparation method thereof. Background technique [0002] With the increase of my country's population, the promotion of urbanization and the improvement of people's material living standards, the demand for various products processed and produced by industrial and mining enterprises has also increased rapidly. Harmful heavy metals (such as Cr, Cd, Pb, As, etc.) discharged into the environmental soil continue to increase, seriously destroying the natural ecological environment and threatening people's health, so the treatment of polluted soil is imminent. [0003] The heavy metals that pollute the soil mainly include mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr) and metalloid arsenic (As) and other elements with significant biological toxicity, as well as zinc (Zn) and copper with certain toxicity. (Cu), nickel (Ni) and other elements; mainly...

AI Technical Summary

Problems solved by technology

[0005] Phytoremediation is recognized as an ideal in-situ soil treatment technology, but there are obvious disadvantages: hyperaccumulator plants tend to be short in size, low in biomass, slow in growth rate, and long in growth cycle; most hyperaccumulator plants can only accumulate certain Heavy metals, not suitable for complex heavy metal contaminated soil remediation; phytoremediation is limited by environmental conditions such as soil type, temperature, humidity and nutrition

The ability of this soil conditioner to fix heavy metals is weak, and the soil fertility retention and water retention performance are not ideal