Improvement repairing agent for soil from returned farmland

Abstract

The invention discloses an improvement repairing agent for soil from returned farmland. The improvement repairing agent comprises the following raw materials in parts by weight: 12-13 parts of coconut coir, 1.8-2.2 parts of zinc-rich yeast freeze-drying powder, 5-6 parts of residue of monosodium glutamate, 9-11 parts of camellia dreg, 3-4 parts of potassium mono-hydrogen-phosphate, 4-5 parts of tamarind polysaccharide gum, 58-60 parts of polluted pen manure, 22-23 parts of papermaking black liquor, 3.5-4.0 parts of a nitric acid solution with concentration being 10%, 13-15 parts of alum slurry, and a proper amount of water. The improvement repairing agent is suitable for ecological recovery for the soil from the returned farmland, can absorb and passivate residual metallization pesticide in the soil, increases the organic level of the soil, increases the adhesive capacity and porosity of the soil, increases water retention and fertilizer conservation effects, and increases the diversity of organism in the soil, so that natural environment can be rapidly recovered, and the soil from the returned farmland can be rapidly recovered.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to an agent for improving and remediating returned farmland soil. Background technique [0002] Soil improvement is aimed at the poor texture and structure of the soil, and corresponding measures are taken to improve soil properties and soil fertility. Soil improvement and restoration agent is an important application of soil improvement. However, the soil remediation and improvement agents currently on the market have many defects: one is that the raw materials used contain artificially synthesized polymer compounds, which are not easy to decompose in the soil and remain for a long time, which has potential safety hazards; Soils, such as acidic and alkaline soils, have no effective targets for heavy metal pollution and nutrient deficiencies, resulting in low efficiency of improvement and restoration, or even counterproductive effects; third, the long cycle and high cost of...

AI Technical Summary

Problems solved by technology

However, the soil remediation and improvement agents currently on the market have many defects: one is that the raw materials used contain artificially synthesized polymer compounds, which are not easy to decompose in the soil and remain for a long time, which has potential safety hazards; Soils, such as acidic and alkaline soils, have no effective targets for heavy metal pollution and lack of nutrients, resulting in low efficiency of improvement and restoration, or even counterproductive effects; third, the cycle of soil improvement is long and the cost is high, so it cannot be applied on a large scale

[0003] At present, people pay less attention to the restoration of returned farmland soil. At the same time, the returned farmland soil relies on its own recovery under natural conditions, which is slow, takes a long period, and the community composition is not complete. Therefore, it is necessary to use soil remediation agents to quickly restore the natural ecosystem of returned farmland soil.

[0004] As a renewable biological resource with a wide range of sources and low cost, pig manure has great potential as a raw material for soil improvement and restoration because it is rich in organic matter and nutrients such as nitrogen, phosphorus, and potassium. The feed contains a large amount of additives during the process, resulting in excessive heavy metals and indirectly polluting the excrement