Reagent for circularly repairing cadmium pollution in rice field and preparation method thereof

A technology for cadmium pollution and restoration of bacterial agents, applied in chemical instruments and methods, other chemical processes, organic fertilizers, etc., can solve problems such as salinization, heavy metal removal, and soil compaction, to promote adsorption, increase soil organic matter, and improve The effect of soil texture

Inactive Publication Date: 2022-04-12
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of heavy metal passivators only changes the form of heavy metals, but does not really remove heavy metals from the soil, and there is a risk of secondary release
In addition, the excessive addition of traditional inorganic passivators will also lead to soil compaction and salinization

Method used

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  • Reagent for circularly repairing cadmium pollution in rice field and preparation method thereof
  • Reagent for circularly repairing cadmium pollution in rice field and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A reagent for cyclically repairing cadmium pollution in paddy fields, comprising the following components in parts by weight:

[0032] 10 parts of humic acid, 5 parts of biochar, 15 parts of restoration agent, 5 parts of montmorillonite, 10 parts of decomposed agricultural and forestry waste, and 1 part of bone charcoal.

[0033] (1) Prepare a single bacterial agent

[0034] The soil samples containing arbuscular mycorrhizal fungus spores, hyphae, and infected plant root segments of the corresponding strains were used as initial inoculants, and host plants were used to propagate arbuscular mycorrhizal fungi in the propagation matrix. The obtained air-dried substrate containing host plant root segments, arbuscular mycorrhizal fungal spores, and root hyphae is a single fungal agent; Physiotomyces moses agent, root inner root fungal agent and Physiomyces scotchica agent

[0035] (2) Preparation of repair bacteria agent

[0036] Mix the single bacterial agents prepared re...

Embodiment 2

[0039] A reagent for cyclically repairing cadmium pollution in paddy fields, comprising the following components in parts by weight:

[0040] 15 parts of humic acid, 10 parts of biochar, 20 parts of restoration agent, 10 parts of montmorillonite, 15 parts of decomposed agricultural and forestry waste, and 5 parts of bone charcoal.

[0041] (1) Prepare a single bacterial agent

[0042] The soil samples containing arbuscular mycorrhizal fungi spores, hyphae and infected plant root segments of the corresponding strains were used as initial inoculants, and host plants were used to propagate arbuscular mycorrhizal fungi in the propagation matrix. The air-dried substrate containing host plant root segment, arbuscular mycorrhizal fungus spores, and root hyphae is a single fungal agent; Physiotomyces moses agent, root inner root fungal agent and Phystomyces scotchica agent

[0043] (2) Preparation of repair bacteria agent

[0044] Mix the single bacterial agents prepared respectivel...

Embodiment 3

[0047] A reagent for cyclically repairing cadmium pollution in paddy fields, comprising the following components in parts by weight:

[0048] 10 parts of humic acid, 5 parts of biochar, 15 parts of restoration agent, 5 parts of montmorillonite, 10 parts of decomposed agricultural and forestry waste, and 3 parts of bone charcoal.

[0049] (1) Prepare a single bacterial agent

[0050] The soil samples containing arbuscular mycorrhizal fungi spores, hyphae and infected plant root segments of the corresponding strains were used as initial inoculants, and host plants were used to propagate arbuscular mycorrhizal fungi in the propagation matrix. The air-dried substrate containing host plant root segment, arbuscular mycorrhizal fungus spores, and root hyphae is a single fungal agent; Physiotomyces moses agent, root inner root fungal agent and Phystomyces scotchica agent

[0051] (2) Preparation of repair bacteria agent

[0052] Mix the single bacterial agents prepared respectively ...

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PUM

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Abstract

The invention discloses a reagent for circularly repairing cadmium pollution of a rice field and a preparation method of the reagent. Comprising the following components in parts by weight: 10-15 parts of humic acid, 5-10 parts of biochar, 15-20 parts of a repairing fungicide, 5-10 parts of montmorillonite, 10-15 parts of agricultural and forestry wastes and 1-5 parts of mineral salt. The reagent prepared by the invention can effectively reduce the content of heavy metals in farmland, especially the content of cadmium, and does not cause harm to soil texture.

Description

technical field [0001] The invention belongs to the technical field of heavy metal remediation treatment, and in particular relates to a cadmium pollution reagent for circular remediation of paddy fields and a preparation method thereof. Background technique [0002] China is a large agricultural country, and rice is one of the most important food crops in China. Rice has always been the staple food of Chinese people. China's rice planting area is less than 30% of the total grain crop planting area, but rice production accounts for about 40% of the total grain output. The sources of heavy metal pollution in paddy fields mainly include industrial sewage irrigation, industrial waste residues, illegal accumulation and discharge of waste gas, agricultural production itself, and the large-scale application of organic fertilizers and chemical fertilizers with excessive heavy metals. Paddy fields polluted by heavy metals will grow rice rich in heavy metals, which will eventually a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C05G3/80C09K101/00C09K109/00
Inventor 谭霄谭博刘超李龙国庄文化李乃稳贺宇欣
Owner SICHUAN UNIV
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