CN111229821A - Biological remediation method for saline-alkali harmful soil - Google Patents
Biological remediation method for saline-alkali harmful soil Download PDFInfo
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- CN111229821A CN111229821A CN201811437828.8A CN201811437828A CN111229821A CN 111229821 A CN111229821 A CN 111229821A CN 201811437828 A CN201811437828 A CN 201811437828A CN 111229821 A CN111229821 A CN 111229821A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/10—Reclamation of contaminated soil microbiologically, biologically or by using enzymes
- B09C1/105—Reclamation of contaminated soil microbiologically, biologically or by using enzymes using fungi or plants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
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- General Health & Medical Sciences (AREA)
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- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
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- Pretreatment Of Seeds And Plants (AREA)
Abstract
A saline-alkali hazard soil bioremediation method comprises the following steps: ploughing soil in a land to be restored and screening out stones, leveling the land, then flood-irrigating the land to be restored, and applying a restoring agent to the soil; coating the selected seeds for restoration, and sowing the seeds to a land to be restored; the repair seeds comprise annual hybrid forage sorghum and/or barley and/or oat; the repairing agent comprises plant growth promoting bacterial liquid and a composite carrier material, wherein the composite carrier material comprises any two or more of organic matters, humic acid, decomposed organic matters, a complexing displacement agent and an embedding material. The bioremediation method for the saline-alkali harmful soil is optimized, and can be used for remedying the saline-alkali harmful soil.
Description
Technical Field
The invention belongs to the technical field of saline-alkali harmful soil remediation, and particularly relates to a biological remediation method for saline-alkali harmful soil.
Background
The saline-alkali harmful soil generally causes geographical, climatic and environmental factors, human factors and the like, and not only influences the normal cultivation and growth of crops, but also causes desertification of the soil after a long time, and even directly harms human health. The current modes for treating saline-alkali harmful soil mainly comprise a physical mode, a chemical mode, a biological mode and the like. The physical and chemical treatment methods have the disadvantages of poor treatment effect, easy repetition, easy generation of secondary pollution and the like. How to effectively treat saline-alkali harmful soil by using a biological mode becomes a technical problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-reliability biological remediation method for saline-alkali harmful soil.
In order to achieve the purpose, the invention adopts the following technical scheme:
a saline-alkali hazard soil bioremediation method comprises the following steps:
ploughing soil in a land to be restored and screening out stones, leveling the land, then flood-irrigating the land to be restored, and applying a restoring agent to the soil;
coating the selected seeds for restoration, and sowing the seeds to a land to be restored;
the seeds for repairing comprise annual hybrid forage grass sorghum and/or barley and/or oat;
the repairing agent comprises plant growth promoting bacterial liquid and a composite carrier material, wherein the composite carrier material comprises any two or more of organic matters, humic acid, decomposed organic matters, complexing displacement agents and embedding materials.
Preferably, the growth-promoting bacteria liquid comprises pseudomonads cedrina UW3 and pseudomonads putida UW4, and the bacteria number ratio of the pseudomonads cedrina UW3 to the pseudomonads putida UW4 is 3:5 to 6: 5.
Preferably, the number of the plant growth-promoting bacteria is at least 1 hundred million per gram of the composite carrier material; preferably, the composite carrier material comprises the following components in percentage by weight, based on 100% of the weight of the composite carrier material: 25% of organic matter, 20% of humic acid, 30% of decomposed organic matter, 15% of complexing replacement agent and 0.5% of embedding material.
Preferably, the crops are cut in the growth process of the crops, and 10 +/-2 cm of stubbles are left at the roots each time.
Preferably, the planting density of the restoration plants is calculated by the number of seeds, the number of barley is 120 to 150 per square meter, the number of oat is 120 to 150 per square meter, and the number of cross-bred forage grass is 70 +/-10 per square meter. And (4) uniformly mixing the seeds by using seed mixing equipment before sowing.
The bioremediation method for the saline-alkali harmful soil is optimized, and can be used for remedying the saline-alkali harmful soil. And each step of the method has clear parameters, and is more suitable for popularization and application.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The present invention is not limited to the description of the following examples.
Example 1
a) Dividing a plurality of saline-alkali land blocks (land blocks to be restored) with the length and the width of 1km respectively to form each group of experiment land blocks, ploughing soil in the land blocks to be restored and screening out stones, then flood-irrigating the land blocks to be restored after the land blocks are leveled, and ploughing for the second time after the land blocks are soaked in water and dried naturally. Applying a remediation agent to the soil. The application amount of the repairing agent is 45 +/-5 kilograms per mu. Preferably, the second plowing is performed after the soil moisture is reduced to about 20%.
b) The plot was again leveled off. In this embodiment, the whole land after leveling has a certain slope, and the lowest slope of the land is provided with a drainage channel connected with the land. After the irrigation is carried out after rain or in the growth process of crops, accumulated water in the drainage channel is drained in time.
c) Coating the selected seeds for restoration, and sowing the seeds to the land to be restored. The seeds are coated with a seed coating agent.
The repair seeds comprise annual hybrid forage sorghum and/or barley and/or oats, namely one or more of the annual hybrid forage sorghum, barley and oats in combination.
The repairing agent comprises plant growth promoting bacterial liquid and a composite carrier material, wherein the composite carrier material comprises any two or more of organic matters, humic acid, decomposed organic matters, a complexing displacement agent and an embedding material.
Preferably, the growth-promoting bacterial liquid comprises pseudomonads cedrina UW3 and pseudomonads putida UW4, and the ratio of the number of the pseudomonads cedrina UW3 to the number of the pseudomonads putida UW4 is 3:5 to 6: 5.
Preferably, the number of bacteria of the plant growth promoting bacteria is about (allowing for normal accuracy deviations) 1 hundred million per gram of composite carrier material; the composite carrier material comprises the following components in percentage by weight based on 100 percent by weight: 25% of organic matter, 20% of humic acid, 30% of decomposed organic matter, 15% of complexing replacement agent and 0.5% of embedding material.
In this embodiment, the seeds sown in the multiple sets of plots are composite seeds, wherein preferably, the planting density of the repair plants is 120 to 150 grains per square meter, the number of the barley is 120 to 150 grains per square meter, the number of the oat is 120 to 150 grains per square meter, and the number of the hybrid forage grass sorghum is 70 ± 10 grains per square meter.
In the process of plant growth, crops in each land are uniformly harvested, and 10 +/-2 cm of stubbles are reserved.
In some embodiments of the present invention, a control example was also provided, which did not seed crops in the plots and did not contain any remediation agent, and which performed the same pre-treatment procedures of the plots such as stone removal, plowing, flood irrigation and the like, and was used for simultaneous irrigation, as in example 1. So that the vegetation on the vegetation can grow naturally. The vegetation is harvested during the same period.
Respectively measuring saline-alkali harmful components Na of saline-alkali land blocks before cultivation and after crop harvest+、Cl-、CO42-、SO42-And the corresponding content. Control plots were also measured.
After one cultivation period in example 1, the content of saline-alkali harmful ingredients in the plots is obviously reduced, and the reduction amplitude is larger than that of the plots in the control group.
Example 2
a) Dividing a plurality of saline-alkali land blocks (land blocks to be restored) with the length and the width of 1km respectively to form each group of experiment land blocks, ploughing soil in the land blocks to be restored and screening out stones, then flood-irrigating the land blocks to be restored after the land blocks are leveled, and ploughing for the second time after the land blocks are soaked in water and dried naturally. Applying a remediation agent to the soil. The application amount of the repairing agent is 45 +/-5 kilograms per mu. Preferably, the second plowing is performed after the soil moisture is reduced to about 20%.
b) The plot was again leveled off. In this embodiment, the whole land after leveling has a certain slope, and the lowest slope of the land is provided with a drainage channel connected with the land. After the irrigation is carried out after rain or in the growth process of crops, accumulated water in the drainage channel is drained in time.
c) Coating the selected seeds for restoration, and sowing the seeds to the land to be restored. The seeds are coated with a seed coating agent.
The repair seeds comprise annual hybrid forage sorghum and/or barley and/or oats, namely one or more of the annual hybrid forage sorghum, barley and oats in combination.
The repairing agent comprises plant growth promoting bacterial liquid and a composite carrier material, wherein the composite carrier material comprises any two or more of organic matters, humic acid, decomposed organic matters, a complexing displacement agent and an embedding material.
Preferably, the growth-promoting bacterial liquid comprises pseudomonads cedrina UW3 and pseudomonads putida UW4, and the ratio of the number of the pseudomonads cedrina UW3 to the number of the pseudomonads putida UW4 is 9: 10.
preferably, the number of bacteria of the plant growth promoting bacteria is about (allowing for normal accuracy deviations) 1 hundred million per gram of composite carrier material; the composite carrier material comprises the following components in percentage by weight based on 100 percent by weight: 25% of organic matter, 20% of humic acid, 30% of decomposed organic matter, 15% of complexing replacement agent and 0.5% of embedding material.
In this embodiment, the seeds sown in the multiple sets of plots are composite seeds, wherein preferably, the planting density of the repair plants is 120 to 150 grains per square meter, the number of the barley is 120 to 150 grains per square meter, the number of the oat is 120 to 150 grains per square meter, and the number of the hybrid forage grass sorghum is 70 ± 10 grains per square meter. In the process of plant growth, crops in each land are uniformly and periodically harvested, and 10 +/-2 cm of stubbles are reserved.
Preferably, in this embodiment, after the crop is cut for the first time, the cut stem is used to set a water-blocking step along a direction perpendicular to the slope (perpendicular to the water flow direction during the flood irrigation), the step is formed by stacking the stems of the plants, the height of the step is 5-8 cm, and after the stacking is finished, soil is coated outside the step. The steps are sequentially arranged along the gradient direction, and after each cultivation period is finished, the steps are cleaned and removed.
In some embodiments of the present invention, a control example is also provided, which is a plot without seeding crops and any remediation agent, and which is used for the same pre-treatment procedures of the plot, such as stone removal, plowing, flood irrigation, etc., and synchronous irrigation, as in example 2. So that the vegetation on the vegetation can grow naturally. The vegetation is harvested during the same period.
Example 2 at the end of each cultivation cycle, the content of its salt-base hazardous components was lower than in example 1. The comparative example of example 2 has substantially the same salt and alkali hazardous composition as the comparative example of example 1.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (5)
1. A saline-alkali hazard soil bioremediation method is characterized in that: the method comprises the following steps:
ploughing soil in a land to be restored and screening out stones, leveling the land, then flood-irrigating the land to be restored, and applying a restoring agent to the soil;
coating the selected seeds for restoration, and sowing the seeds to a land to be restored;
the seeds for repairing comprise annual hybrid forage grass sorghum and/or barley and/or oat;
the repairing agent comprises plant growth promoting bacterial liquid and a composite carrier material, wherein the composite carrier material comprises any two or more of organic matters, humic acid, decomposed organic matters, complexing displacement agents and embedding materials.
2. The method for biologically remedying the saline-alkali damaged soil according to claim 1, wherein the method comprises the following steps: the growth promoting bacterium liquid comprises pseudomonads cedrina UW3 and pseudomonads putida UW4, and the bacterium number ratio of the pseudomonads cedrina UW3 to the pseudomonads putida UW4 is 3:5 to 6: 5.
3. The method for biologically remedying the saline-alkali damaged soil according to claim 1, wherein the method comprises the following steps: the number of the plant growth-promoting bacteria is at least 1 hundred million/g of the composite carrier material; preferably, the composite carrier material comprises the following components in percentage by weight, based on 100% of the weight of the composite carrier material: 25% of organic matter, 20% of humic acid, 30% of decomposed organic matter, 15% of complexing replacement agent and 0.5% of embedding material.
4. The method for biologically remedying the saline-alkali damaged soil according to claim 1, wherein the method comprises the following steps: the crops are cut in the growth process of the crops, and 10 +/-2 cm of stubbles are left at the roots each time.
5. The method for biologically remedying the saline-alkali damaged soil according to claim 1, wherein the method comprises the following steps: the seeds comprise annual hybrid forage grass sorghum and barley and oat, the planting density of the restoration plants is calculated by the number of seeds, the barley is 120 to 150 grains per square meter, the oat is 120 to 150 grains per square meter, and the hybrid forage grass sorghum is 70 +/-10 grains per square meter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811437828.8A CN111229821A (en) | 2018-11-29 | 2018-11-29 | Biological remediation method for saline-alkali harmful soil |
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| CN201811437828.8A CN111229821A (en) | 2018-11-29 | 2018-11-29 | Biological remediation method for saline-alkali harmful soil |
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Citations (9)
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| CN102605794A (en) * | 2012-04-16 | 2012-07-25 | 北京林业大学 | Hill collapsing and garden making water and soil conservation method |
| CN103290812A (en) * | 2013-05-30 | 2013-09-11 | 曹世雄 | Agriculture and forestry composite treating method for channels |
| CN104094692A (en) * | 2014-06-30 | 2014-10-15 | 北京师范大学 | Method for reducing slope cropland non-point source pollution by biochar-improved ecological ridge |
| CN104741368A (en) * | 2015-04-02 | 2015-07-01 | 黄晓东 | Method for biological remediation of soil with saline-alkali harms and application |
| CN104772328A (en) * | 2015-04-02 | 2015-07-15 | 黄晓东 | Method for biologically repairing soil polluted by petroleum hydrocarbon compounds and application |
| CN104959379A (en) * | 2015-07-31 | 2015-10-07 | 黄晓东 | Soil remediation method and application thereof |
| CN105075792A (en) * | 2015-08-12 | 2015-11-25 | 北京林业大学 | Earth-rock mountain region low-interference artificial afforestation and soil preparation method |
| CN107223431A (en) * | 2017-06-16 | 2017-10-03 | 云南省农业科学院热区生态农业研究所 | A kind of dry hot gas sisal hemp arid hillside field progressively terrace land method |
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2018
- 2018-11-29 CN CN201811437828.8A patent/CN111229821A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101497542A (en) * | 2008-11-19 | 2009-08-05 | 黄晓东 | Biological preparation containing plant growth promoting bacteria, as well as preparation and use thereof |
| CN102605794A (en) * | 2012-04-16 | 2012-07-25 | 北京林业大学 | Hill collapsing and garden making water and soil conservation method |
| CN103290812A (en) * | 2013-05-30 | 2013-09-11 | 曹世雄 | Agriculture and forestry composite treating method for channels |
| CN104094692A (en) * | 2014-06-30 | 2014-10-15 | 北京师范大学 | Method for reducing slope cropland non-point source pollution by biochar-improved ecological ridge |
| CN104741368A (en) * | 2015-04-02 | 2015-07-01 | 黄晓东 | Method for biological remediation of soil with saline-alkali harms and application |
| CN104772328A (en) * | 2015-04-02 | 2015-07-15 | 黄晓东 | Method for biologically repairing soil polluted by petroleum hydrocarbon compounds and application |
| CN104959379A (en) * | 2015-07-31 | 2015-10-07 | 黄晓东 | Soil remediation method and application thereof |
| CN105075792A (en) * | 2015-08-12 | 2015-11-25 | 北京林业大学 | Earth-rock mountain region low-interference artificial afforestation and soil preparation method |
| CN107223431A (en) * | 2017-06-16 | 2017-10-03 | 云南省农业科学院热区生态农业研究所 | A kind of dry hot gas sisal hemp arid hillside field progressively terrace land method |
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Application publication date: 20200605 |