Micro-ecological restoration method for farmland heavy metal pollution

Abstract

The invention discloses a micro-ecological restoration method for farmland heavy metal pollution and belongs to the technical field of soil heavy metal pollution farmland control. The method comprises the following steps that (1) before crops are planted, charcoal dust and micro-biological mixed bacterium liquid are applied into soil along with plowing of the soil; and (2) in the mid-term of plant growth, micro-biological mixed bacterium liquid and micro-biological mixed culture media are applied into the earth surface through a spraying mode. The micro-ecological restoration method for farmland heavy metal pollution is conducted along with farm operation, and the effect is good, large-scale utilization can be achieved; particularly, most of used micro-biological composite bacterial agents are active bacteria, reproduction can be conducted in the soil environment, and heavy metal can be continuously subjected to adsorption and complexation; the used charcoal dust, micro-biological mixed bacterium liquid and the like are all biological materials so that the materials can be completely degraded into organic materials and absorbed by plants, and the soil is protected against secondary pollution; and therefore, at present, the method has specially obvious advantages.

Description

technical field

[0001] The invention relates to a method for micro-ecological restoration of farmland heavy metal pollution, in particular to an in-situ restoration method for heavy metal-polluted farmland without fallow, and belongs to the technical field of soil heavy metal-polluted farmland treatment. Background technique

[0002] In recent years, with the acceleration of industrialization and urbanization, my country's environmental pollution has intensified, and the overall situation is not optimistic, especially the problem of heavy metal pollution in soil. It not only poses a serious threat to the ecological environment, food safety and human health. threats, but also lead to conditions where crops fail to grow and heavy metals accumulate in crops. As we all know, soil is the material basis for human survival and an indispensable and non-renewable natural resource for human beings. Not only because it has the function of producing green plants, but also a place for na...

Examples

Embodiment 1

[0055] In the plots polluted by heavy metals in the farmland, plowing and spreading can be carried out according to the dosage in the table below before planting

[0056] Table 1 Optimal ratio of heavy metals in soil for micro-ecological remediation in the early stage

[0057] Material Formula 1 (kg) Formula 2 (kg) Formula 3 (kg) Recipe 4 (kg) Formula 5 (kg) charcoal powder 10 7 5 3 10 Candida 3 2 4 3 2 beer yeast 3 2 4 2 3 Rhodopseudomonas shaozei 3 3 1 2 2 Bacillus subtilis 1 3 1 3 3

[0058] Wherein, Saccharomyces cerevisiae is the current industrial strain (strain preservation number: CICC1928), the industrial strain of Candida (strain preservation number: CICC1268), Rhodopseudomonas palustris (strain preservation number: CICC23812), Saccharomyces subtilis Bacillus R31 (strain deposit number: CCTCC M209261).

Embodiment 2

[0060] In the mid-growth period of crops, spray according to the following formula to control the effective state of heavy metals in the soil.

[0061] Table 2 Optimum ratio of heavy metals in micro-ecological restoration soil in mid-crop growth period

[0062] Material Formula 1 (kg) Formula 2 (kg) Formula 3 (kg) Recipe 4 (kg) Formula 5 (kg) Candida 3 2 4 3 2 beer yeast 3 2 4 2 3 Rhodopseudomonas shaozei 3 3 1 2 2 Bacillus subtilis 1 3 1 3 3

[0063] Wherein, Saccharomyces cerevisiae is the current industrial strain (strain preservation number: CICC1928), the industrial strain of Candida (strain preservation number: CICC1268), Rhodopseudomonas palustris (strain preservation number: CICC23812), Saccharomyces subtilis Bacillus R31 (strain deposit number: CCTCC M209261).

Embodiment 3

[0065] The soil for the test is located in the vegetable field near the suburb of Zhongshan City, Guangdong Province. The total test area is 1 mu, which is divided into 5 plots on average. Four kinds of crops, water spinach, cabbage, pepper and tomato, are planted at the same time, and the whole plant is harvested after 60 days. The heavy metal content in the whole plant, in which the treated soil is the first stage using charcoal powder 50 mesh 10kg / mu, Candida 3kg / mu, brewer's yeast 3kg / mu, Bacillus subtilis 2kg / mu, Shaoze Rhodopseudomonas Bacillus 2kg / mu; second stage Candida 3kg / mu, brewer's yeast 3kg / mu, Bacillus subtilis 2kg / mu, Rhodopseudomonas shaoze 2kg / mu and mixed medium (beef broth peptone + glucose + soluble Starch+soybean powder, 0.5% by weight, 3% by weight, 1.5% by weight, 1.5% by weight) 10L; wherein the content of effective active spores of each microorganism is greater than 1 to 2 billion active spores / gram.

[0066] For the determination of heavy metal cont...

technical field

[0001] The invention relates to a method for micro-ecological restoration of farmland heavy metal pollution, in particular to an in-situ restoration method for heavy metal-polluted farmland without fallow, and belongs to the technical field of soil heavy metal-polluted farmland treatment. Background technique

[0002] In recent years, with the acceleration of industrialization and urbanization, my country's environmental pollution has intensified, and the overall situation is not optimistic, especially the problem of heavy metal pollution in soil. It not only poses a serious threat to the ecological environment, food safety and human health. threats, but also lead to conditions where crops fail to grow and heavy metals accumulate in crops. As we all know, soil is the material basis for human survival and an indispensable and non-renewable natural resource for human beings. Not only because it has the function of producing green plants, but also a place for na...

Examples

Embodiment 1

[0055] In the plots polluted by heavy metals in the farmland, plowing and spreading can be carried out according to the dosage in the table below before planting

[0056] Table 1 Optimal ratio of heavy metals in soil for micro-ecological remediation in the early stage

[0057] Material Formula 1 (kg) Formula 2 (kg) Formula 3 (kg) Recipe 4 (kg) Formula 5 (kg) charcoal powder 10 7 5 3 10 Candida 3 2 4 3 2 beer yeast 3 2 4 2 3 Rhodopseudomonas shaozei 3 3 1 2 2 Bacillus subtilis 1 3 1 3 3

[0058] Wherein, Saccharomyces cerevisiae is the current industrial strain (strain preservation number: CICC1928), the industrial strain of Candida (strain preservation number: CICC1268), Rhodopseudomonas palustris (strain preservation number: CICC23812), Saccharomyces subtilis Bacillus R31 (strain deposit number: CCTCC M209261).

Embodiment 2

[0060] In the mid-growth period of crops, spray according to the following formula to control the effective state of heavy metals in the soil.

[0061] Table 2 Optimum ratio of heavy metals in micro-ecological restoration soil in mid-crop growth period

[0062] Material Formula 1 (kg) Formula 2 (kg) Formula 3 (kg) Recipe 4 (kg) Formula 5 (kg) Candida 3 2 4 3 2 beer yeast 3 2 4 2 3 Rhodopseudomonas shaozei 3 3 1 2 2 Bacillus subtilis 1 3 1 3 3

[0063] Wherein, Saccharomyces cerevisiae is the current industrial strain (strain preservation number: CICC1928), the industrial strain of Candida (strain preservation number: CICC1268), Rhodopseudomonas palustris (strain preservation number: CICC23812), Saccharomyces subtilis Bacillus R31 (strain deposit number: CCTCC M209261).

Embodiment 3

[0065] The soil for the test is located in the vegetable field near the suburb of Zhongshan City, Guangdong Province. The total test area is 1 mu, which is divided into 5 plots on average. Four kinds of crops, water spinach, cabbage, pepper and tomato, are planted at the same time, and the whole plant is harvested after 60 days. The heavy metal content in the whole plant, in which the treated soil is the first stage using charcoal powder 50 mesh 10kg / mu, Candida 3kg / mu, brewer's yeast 3kg / mu, Bacillus subtilis 2kg / mu, Shaoze Rhodopseudomonas Bacillus 2kg / mu; second stage Candida 3kg / mu, brewer's yeast 3kg / mu, Bacillus subtilis 2kg / mu, Rhodopseudomonas shaoze 2kg / mu and mixed medium (beef broth peptone + glucose + soluble Starch+soybean powder, 0.5% by weight, 3% by weight, 1.5% by weight, 1.5% by weight) 10L; wherein the content of effective active spores of each microorganism is greater than 1 to 2 billion active spores / gram.

[0066] For the determination of heavy metal cont...

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