Biological bacterial fertilizer and application for strengthening phytoremediation of cadmium-contaminated soil

A cadmium-contaminated soil and phytoremediation technology, which is applied in the restoration of contaminated soil, application, organic fertilizers, etc., can solve the problems of huge differences in the joint effects of different plants, and achieve the goal of improving repair efficiency, promoting plant growth, and having little antagonism Effect

Active Publication Date: 2019-02-22
MIANYANG TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: how to provide a kind of biological bacterial fertilizer for jointly repairing cadmium-contaminated soil by microorganisms and plants, and solve the antagonism between bacterial strains when existing microorganisms and plants interact to repair heavy metal-contaminated soil , the problem of huge differences in combined effects with different plants

Method used

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  • Biological bacterial fertilizer and application for strengthening phytoremediation of cadmium-contaminated soil
  • Biological bacterial fertilizer and application for strengthening phytoremediation of cadmium-contaminated soil
  • Biological bacterial fertilizer and application for strengthening phytoremediation of cadmium-contaminated soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1 (experiment material: grain amaranth)

[0048] Table 5 Experimental results

[0049]

[0050] Harvest grain amaranth after the test, divide the plant into roots, stems and leaves successively, dry in an oven at a constant temperature of 105°C, measure the dry weight and heavy metal content of each tissue of the plant, as shown in Table 5, the results show that: apply the biological bacterial fertilizer of the present invention Compared with the non-applied group (Group A), the dry weight of the aerial part, the dry weight of the underground part, the transfer coefficient and the enrichment coefficient of the grain amaranth plants in the group (Group B) increased by 99.15%, 57.19%, 35.16% and 45.76%, respectively.

Embodiment 2

[0051] Embodiment 2 (experiment material: nightshade)

[0052] Table 6 Experimental results

[0053]

[0054] Harvest Solanum nigrum after the test, divide the plant into roots, stems and leaves successively, dry in an oven at a constant temperature of 105°C, measure the dry weight and heavy metal content of each tissue of the plant, as shown in Table 6, the results show that: apply the biological bacterial fertilizer of the present invention Compared with the non-applied group (Group A), the dry weight of the aerial part, the dry weight of the underground part, the transfer coefficient and the enrichment coefficient of the Solanum nigrum plants in the group (Group B) increased by 50.09%, 29.16%, 28.2% and 62.5%, respectively.

Embodiment 3

[0055] Embodiment 3 (experiment material: pokeweed)

[0056] Table 7 Experimental results

[0057]

[0058] Harvest Phytolacca plants after the test, divide the plants into roots, stems and leaves successively, dry them in an oven at a constant temperature of 105°C, measure the dry weight and heavy metal content of each tissue of the plants, as shown in Table 7, the results show that: apply the biological agent of the present invention Compared with the non-applied group (Group A), the dry weight of the above-ground part, the dry weight of the underground part, the transfer coefficient and the enrichment coefficient of the plants of the bacterial fertilizer group (Group B) increased by 46.83%, 63.56%, 41.39% and 66.67%, respectively. %.

[0059] The above three examples fully prove that the biological bacterial fertilizer of the present invention can improve the efficiency of three kinds of plants of grain amaranth, black nightshade and pokeweed to remediate cadmium-contam...

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Abstract

The invention discloses a biological bacterial fertilizer and application for strengthening phytoremediation of cadmium-contaminated soil. The fertilizer is composed of pseudomonas aeruginosa, enterobacter cloacae, paenibacillus polymyxa and bacillus mucilaginosus krassilnikov in the ratio of 3:2:3:1. In addition to the capability of activating soil heavy metal cadmium and changing the effectiveness of the cadmium in the soil, the biological bacterial fertilizer can further produce plant growth regulating substances, secrete antibiotics (IAA and iron carrier) substances and promote plant growth, thereby increasing the phytoremediation rate of the cadmium-contaminated soil.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering, and specifically relates to the field of phytoremediation of soil cadmium pollution. Background technique [0002] In recent years, the national soil pollution has become more and more serious. In 2014, the Ministry of Environmental Protection and the Ministry of Land and Resources issued the "National Soil Pollution Survey Bulletin", which showed that the national cultivated land soil point pollutants exceeded the standard rate of 19.4%, and the main pollutants were cadmium, nickel, copper, etc. Among them, the rate of soil cadmium exceeding the standard reached 7.0%. [0003] Due to the refractory and high accumulation of cadmium, it accumulates in the organism through acute or chronic toxicity, and can cause toxicity to plants at a low concentration. At present, in the remediation technology of cadmium-contaminated soil, phytoremediation technology has attracted people's att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F11/08C05G3/04B09C1/10C05G3/80
CPCB09C1/105C05F11/08C05G3/80
Inventor 康卫龙罗明华姜立春邹利娟金兰蒲芬
Owner MIANYANG TEACHERS COLLEGE
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