Application of trichoderma reesei and sedum plumbizincicola in remediation of cadmium-polluted farmland soil

A technology of Trichoderma reesei and sedum with ore is applied in the field of remediation of cadmium-contaminated farmland soil, which can solve the problems of crop yield and quality decline, unreasonable agricultural management measures, affecting plant growth, etc. Ecological effect, the effect of increasing biomass

Active Publication Date: 2013-07-10
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, due to the discharge of industrial "three wastes" and unreasonable agricultural management measures, soil Cd pollution has become increasingly serious, affecting the growth of plants, resulting in a decline in crop yield and quality

Method used

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  • Application of trichoderma reesei and sedum plumbizincicola in remediation of cadmium-polluted farmland soil
  • Application of trichoderma reesei and sedum plumbizincicola in remediation of cadmium-polluted farmland soil
  • Application of trichoderma reesei and sedum plumbizincicola in remediation of cadmium-polluted farmland soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Trichoderma fermented liquid to the treatment of cadmium-contaminated soil repaired by Sedum sedum with ore

[0021] 1 Materials and methods

[0022] 1.1 Test soil

[0023] The ferrous wet leached soil (yellow brown soil) collected from Qixia Mountain in Nanjing is clean, and its basic physical and chemical properties are: pH5.38 (H 2 O), organic matter 21.3g / kg, alkaline nitrogen 162.3mg / kg, available phosphorus 11.7mg / kg, available potassium 82.2mg / kg, cation exchange capacity 16.5cmol / kg, total cadmium content 0.05mg / kg. Soil samples were passed through a 2 mm sieve after natural air drying for pot plant simulation experiments.

[0024] 1.2 Test plants

[0025] Sedum sedum seedlings are self-cultivated seedlings in the laboratory.

[0026] 1.3 Tested strains

[0027] Trichoderma reesei (Trichoderma reesei) strain FS10-C (preservation number: CGMCC No.3970), white cotton-like mycelia, green spores, producing yellow pigment.

[0028] 1.4 Medium

[...

Embodiment 2

[0051] Embodiment 2: the treatment of Trichoderma solid preparation to repair cadmium-contaminated soil with ore Sedum

[0052] 1 Materials and methods

[0053] 1.1 Test strains

[0054] Trichoderma reesei strain FS10-C (T. reesei FS10-C) (deposit number: CGMCC No.3970).

[0055] 1.2 Test soil

[0056] Collected from a basic farmland protection area near a typical waste electronic waste recycling site in the eastern coastal area of ​​Zhejiang. The soil type is paddy soil, the soil-forming parent material is marine sediment, and the system classification belongs to iron-accumulated hydroponic man-made soil. Due to pickling recycling of waste metals and waste incineration and dismantling in this area, the heavy metal content in farmland soil exceeds the standard. The basic physical and chemical properties and soil heavy metal pollution are shown in Table 2.

[0057] Table 2 The main physical and chemical properties and heavy metal content of the tested soil

[0058]

[0...

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Abstract

The invention provides the application of trichoderma reesei and sedum plumbizincicola in the remediation of cadmium-polluted farmland soil. The application comprises the following steps of: cutting sedum plumbizincicola seedlings with about 10cm of plant height into soil to be remedied, applying trichoderma reesei FS10-C fermentation liquor or microbial preparation to the rhizosphere of the plant, keeping the soil water content to be 70%wt of the maximum field capacity in the process of remediation, and scissoring the plant along the surface of soil after the plant grows for 60-150 days to complete one remediation process. According to the application, the plant remediation efficiency of the cadmium-polluted farmland soil can be improved; and the sedum plumbizincicola plant remediation efficiency can be improved according to the trichoderma preparation, the biomass of the soil microorganism can be enhanced, the micro-ecological environment of the soil can be improved, and the application is good in ecological efficiency, and suitable for the remediation of the cadmium-polluted farmland soil.

Description

technical field [0001] The invention relates to a restoration method for cadmium-contaminated farmland soil, in particular to the application of Trichoderma reesei FS10-C combined with sedum sedum in restoration of farmland cadmium-contaminated soil. Background technique [0002] Cadmium (Cd) is one of the most toxic heavy metal elements. In recent years, due to the discharge of industrial "three wastes" and unreasonable agricultural management measures, soil Cd pollution has become increasingly serious, affecting the growth of plants, resulting in a decline in crop yield and quality. Therefore, the control and remediation of Cd-contaminated soil has attracted more and more attention worldwide. At present, among the many control methods of Cd-contaminated soil, extracting Cd from soil by hyperaccumulator plants is the soil restoration and improvement method with the best ecological effect, among which Sedum sedum is a hyperaccumulator of cadmium. In order to further improv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
Inventor 滕应马文亭骆永明李振高刘五星吴龙华
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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