CN117106457A - High-salt high-alkaline land soil conditioner and preparation method and application thereof - Google Patents
High-salt high-alkaline land soil conditioner and preparation method and application thereof Download PDFInfo
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- 239000003516 soil conditioner Substances 0.000 title claims abstract description 50
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000003513 alkali Substances 0.000 claims abstract description 34
- 239000000084 colloidal system Substances 0.000 claims abstract description 31
- 239000004113 Sepiolite Substances 0.000 claims abstract description 23
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 23
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 23
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229940051841 polyoxyethylene ether Drugs 0.000 claims abstract description 17
- 229920000056 polyoxyethylene ether Polymers 0.000 claims abstract description 17
- DUIOKRXOKLLURE-UHFFFAOYSA-N 2-octylphenol Chemical compound CCCCCCCCC1=CC=CC=C1O DUIOKRXOKLLURE-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229920001661 Chitosan Polymers 0.000 claims abstract description 10
- 229960002089 ferrous chloride Drugs 0.000 claims abstract description 10
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims abstract description 10
- 239000002364 soil amendment Substances 0.000 claims abstract description 9
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 7
- 229920002246 poly[2-(dimethylamino)ethyl methacrylate] polymer Polymers 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims description 32
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000020477 pH reduction Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 6
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- AEMOLEFTQBMNLQ-AQKNRBDQSA-N D-glucopyranuronic acid Chemical compound OC1O[C@H](C(O)=O)[C@@H](O)[C@H](O)[C@H]1O AEMOLEFTQBMNLQ-AQKNRBDQSA-N 0.000 claims description 2
- IAJILQKETJEXLJ-UHFFFAOYSA-N Galacturonsaeure Natural products O=CC(O)C(O)C(O)C(O)C(O)=O IAJILQKETJEXLJ-UHFFFAOYSA-N 0.000 claims description 2
- 229940097043 glucuronic acid Drugs 0.000 claims description 2
- 230000003750 conditioning effect Effects 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 95
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 14
- 238000001514 detection method Methods 0.000 description 8
- 230000002262 irrigation Effects 0.000 description 5
- 238000003973 irrigation Methods 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 2
- 241000208818 Helianthus Species 0.000 description 2
- 235000003222 Helianthus annuus Nutrition 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003337 fertilizer Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 150000003385 sodium Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2101/00—Agricultural use
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
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- Chemical & Material Sciences (AREA)
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention relates to the technical field of soil amendments, and provides a high-salt high-alkali soil amendment, a preparation method and application thereof, wherein the high-salt high-alkali soil amendment comprises a component A solution; the component A solution comprises the following components in parts by weight: 25-65 parts of shale, 15-30 parts of sepiolite, 10-20 parts of octyl phenol polyoxyethylene ether, 80-200 parts of sulfuric acid solution, and the high-salt high-alkaline land soil conditioner also comprises a component B colloid, wherein the component B colloid comprises the following components in parts by weight: 16-20 parts of chitosan, 15-20 parts of ferrous chloride, 30-70 parts of hydrochloric acid solution, 8-10 parts of poly (N, N-dimethylaminoethyl methacrylate) and 1-3 parts of cross-linking agent. Through the technical scheme, the problem that the existing soil conditioner cannot treat high-salt high-alkali soil is solved.
Description
Technical Field
The invention relates to the technical field of soil amendments, in particular to a high-salt high-alkali soil amendment and a preparation method and application thereof.
Background
Saline-alkali soil is a generic term for various alkaline soil and salinized soil. The total area of the global saline-alkali soil is about 9.5 hundred million hectares currently, and data show that the global saline-alkali soil is increasing at a rate of 100 to 150 ten thousand hectares each year. The saline-alkali soil in China is mainly distributed in North China, northwest China, northeast China, east China and other areas, and particularly in Xinjiang, inner Mongolia, ningxia, gansu and other provinces, and the saline-alkali soil hazard is serious. Salinization is known as "stubborn" of the land, which results in low yield or inability of the crop to grow. Therefore, the improvement of the saline-alkali soil has profound practical significance for realizing sustainable development of agriculture and guaranteeing grain safety in China.
The saline-alkali soil improvement measure mainly comprises: water conservation improvement measures, chemical improvement measures, biological improvement measures and agricultural improvement measures. The water conservancy improvement measures are to wash and remove salt from the saline-alkali soil by means of drip irrigation, flood irrigation, drainage, leaching and the like, so that the content of salt on the surface layer of the soil is reduced, and an environment favorable for crop growth is created. The agricultural improvement measures mainly include deep ploughing and subsoiling, soil leveling, soil changing method, raising topography, improving soil in micro-areas, covering the ground surface and the like, so as to create proper growth conditions for crops. Biological improvement is the screening or cultivation of salt tolerant plants, microorganisms, animals, relying on plant, microorganism and animal interactions with soil salt to reduce soil salt content. Chemical improvement means a process of improving saline-alkali soil by applying chemical improvers, organic fertilizers, mineral fertilizers and the like to the saline-alkali soil. Among the four measures, the hydraulic measure engineering is complex, the early investment is large, and the management difficulty is high; the agricultural measures and biological measures have unobvious effects and slow effect taking speed in a short time, and the improvement and treatment of high-salt and high-alkali lands are difficult to realize; the chemical improvement measures are convenient to operate, quick in effect and low in cost, and become one of important directions of saline-alkali soil treatment and research.
At present, the salinization degree of the saline-alkali soil in China tends to be serious, the area of the high-salt high-alkali soil is continuously increased, and the high-salt high-alkali soil treatment technology with the salt content of more than 1% and the content of substituted sodium of more than 20% is lacked. Therefore, the development of the high-salt high-alkaline land soil conditioner has great significance.
Disclosure of Invention
The invention provides a high-salt high-alkali soil conditioner, and a preparation method and application thereof, and solves the problem that the existing soil conditioner cannot treat high-salt high-alkali soil.
The technical scheme of the invention is as follows:
the invention provides a high-salt high-alkaline land soil conditioner, which comprises a component A solution;
the component A solution comprises the following components in parts by weight: 25-65 parts of shale, 15-30 parts of sepiolite, 10-20 parts of octyl phenol polyoxyethylene ether and 80-200 parts of sulfuric acid solution.
As a further technical solution, the mass ratio of the shale to the sepiolite is 2:1.
As a further technical scheme, the preparation method of the component A solution comprises the following steps: adding shale, sepiolite and octyl phenol polyoxyethylene ether into the sulfuric acid solution, uniformly dispersing, and acidizing to obtain the component A solution.
As a further technical scheme, the mass fraction of the sulfuric acid solution is 20% -30%.
As a further technical scheme, the temperature is 50-60 ℃ and the time is 24-36h during the acidification reaction.
As a further technical scheme, the adhesive also comprises a component B colloid, wherein the component B colloid comprises the following components in parts by weight: 16-20 parts of chitosan, 15-20 parts of ferrous chloride, 30-70 parts of hydrochloric acid solution, 8-10 parts of poly (N, N-dimethylaminoethyl methacrylate) and 1-3 parts of cross-linking agent;
the mass ratio of the component A solution to the component B colloid is 2-3:1.
As a further technical scheme, the mass ratio of the chitosan to the poly (N, N-dimethylaminoethyl methacrylate) is 2:1.
As a further technical scheme, the mass fraction of the hydrochloric acid solution is 20% -30%.
As a further technical scheme, the cross-linking agent is ethylene glycol diacid or glucuronic acid.
As a further technical scheme, the preparation method of the component B colloid comprises the following steps: dissolving ferrous chloride in hydrochloric acid solution, adding chitosan, heating and mixing until uniformity, obtaining pretreatment liquid, adding polymethyl methacrylate N, N-dimethylaminoethyl ester and a cross-linking agent into the pretreatment liquid, and dispersing uniformly, thus obtaining the component B colloid.
The invention also provides a preparation method of the high-salt high-alkaline land soil conditioner, which comprises the following steps: and uniformly dispersing the component A solution and the component B colloid to obtain the soil conditioner.
The invention also provides application of the soil conditioner in improving high-salt and high-alkali lands.
The working principle and the beneficial effects of the invention are as follows:
1. in the invention, the component A solution prepared from shale, sepiolite, octyl phenol polyoxyethylene ether and sulfuric acid solution contains a large amount of sulfate radicals and various trace elements, so that the pH value and the salt content of soil can be effectively reduced, and the fertility of the soil can be improved. The addition of the octyl phenol polyoxyethylene ether promotes the dissolution and dispersion of shale and sepiolite, and can lead the component A solution to form nano particles. The nano particles can enter capillary pores in the soil, so that the water retention effect can be achieved, the salt returning phenomenon can be avoided, and the salt content of the soil is reduced.
2. According to the invention, when the mass ratio of shale to sepiolite in the component A solution is 2:1, the prepared soil conditioner can further reduce the pH value and the salt content of soil.
3. In the invention, the soil conditioner also comprises a component B colloid, wherein the component B colloid has water absorption property, can further improve the water holding capacity of soil after irrigation, and can prevent salt from returning after irrigation, thereby further reducing the salt content of the soil. In addition, ferrous ions in the component B colloid can further reduce the pH value of the soil.
4. In the invention, when the mass ratio of the component A solution to the component B colloid is 2-3:1, the soil conditioner can further reduce the pH value and the salt content of the soil and further improve the water holding capacity of the soil.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following examples and comparative examples, the model of the octylphenol polyoxyethylene ether was OP-10, the model of the chitosan was TCI-C0831, and the molecular weight of the poly (N, N-dimethylaminoethyl methacrylate) was 5000, unless otherwise specified.
Example 1
The preparation method of the high-salt high-alkaline land soil conditioner comprises the following steps: and adding 25 parts of shale, 15 parts of sepiolite and 10 parts of octyl phenol polyoxyethylene ether into 80 parts of sulfuric acid solution, uniformly dispersing, and carrying out acidification reaction to obtain the high-salt and high-alkali soil conditioner, wherein the mass fraction of the sulfuric acid solution is 20%, the temperature of the acidification reaction is 50 ℃, and the time is 36h.
Example 2
The preparation method of the high-salt high-alkaline land soil conditioner comprises the following steps: and adding 65 parts of shale, 30 parts of sepiolite and 20 parts of octyl phenol polyoxyethylene ether into 200 parts of sulfuric acid solution, uniformly dispersing, and carrying out acidification reaction to obtain the high-salt and high-alkali soil conditioner, wherein the mass fraction of the sulfuric acid solution is 20%, the temperature of the acidification reaction is 60 ℃, and the time is 24 hours.
Example 3
The preparation method of the high-salt high-alkaline land soil conditioner comprises the following steps: and adding 55 parts of shale, 30 parts of sepiolite and 20 parts of octyl phenol polyoxyethylene ether into 200 parts of sulfuric acid solution, uniformly dispersing, and carrying out acidification reaction to obtain the high-salt and high-alkali soil conditioner, wherein the mass fraction of the sulfuric acid solution is 20%, the temperature of the acidification reaction is 60 ℃, and the time is 24 hours.
Example 4
The preparation method of the high-salt high-alkaline land soil conditioner comprises the following steps: 60 parts of shale, 30 parts of sepiolite and 20 parts of octyl phenol polyoxyethylene ether are added into 200 parts of sulfuric acid solution, the mixture is uniformly dispersed, and the high-salt and high-alkali soil conditioner is obtained after acidification reaction, wherein the mass fraction of the sulfuric acid solution is 20%, the temperature of the acidification reaction is 60 ℃, and the time is 24 hours.
Example 5
The preparation method of the high-salt high-alkaline land soil conditioner comprises the following steps: and adding 50 parts of shale, 25 parts of sepiolite and 15 parts of octyl phenol polyoxyethylene ether into 140 parts of sulfuric acid solution, uniformly dispersing, and carrying out acidification reaction to obtain the high-salt and high-alkali soil conditioner, wherein the mass fraction of the sulfuric acid solution is 20%, the temperature of the acidification reaction is 55 ℃, and the time is 30 hours.
Example 6
The preparation method of the high-salt high-alkaline land soil conditioner comprises the following steps:
s1, adding 50 parts of shale, 25 parts of sepiolite and 15 parts of octyl phenol polyoxyethylene ether into 140 parts of sulfuric acid solution, uniformly dispersing, and acidizing to obtain a high-salt high-alkaline land soil conditioner, wherein the mass fraction of the sulfuric acid solution is 20%, the temperature of the acidizing is 55 ℃, and the time is 30 hours;
s2, dissolving 15 parts of ferrous chloride in 30 parts of hydrochloric acid solution, adding 16 parts of chitosan, heating and mixing at 50 ℃ until uniform to obtain a pretreatment solution, adding 8 parts of polymethyl methacrylate N, N-dimethylaminoethyl ester and 1 part of ethylene glycol diacid into the pretreatment solution, and performing ultrasonic dispersion until uniform to obtain a component B colloid, wherein the mass fraction of the hydrochloric acid solution is 20%;
s3, uniformly dispersing the component A solution and the component B colloid by ultrasonic to obtain the high-salt high-alkali soil conditioner.
Example 7
The preparation method of the high-salt high-alkaline land soil conditioner comprises the following steps:
s1, adding 50 parts of shale, 25 parts of sepiolite and 15 parts of octyl phenol polyoxyethylene ether into 140 parts of sulfuric acid solution, uniformly dispersing, and acidizing to obtain a high-salt high-alkaline land soil conditioner, wherein the mass fraction of the sulfuric acid solution is 20%, the temperature of the acidizing is 55 ℃, and the time is 30 hours;
s2, dissolving 20 parts of ferrous chloride in 70 parts of hydrochloric acid solution, adding 20 parts of chitosan, heating and mixing at 50 ℃ until uniform to obtain a pretreatment solution, adding 10 parts of polymethyl methacrylate N, N-dimethylaminoethyl ester and 3 parts of ethylene glycol diacid into the pretreatment solution, and performing ultrasonic dispersion until uniform to obtain a component B colloid, wherein the mass fraction of the hydrochloric acid solution is 20%;
s3, uniformly dispersing the component A solution and the component B colloid by ultrasonic to obtain the high-salt high-alkali soil conditioner.
Example 8
The difference between this example and example 7 is that in step S3 of this example, 230 parts of the component a solution and 70 parts of the component B colloid were uniformly dispersed by ultrasonic to obtain a high-salt high-alkali soil conditioner.
Example 9
The difference between this example and example 7 is that in step S3 of this example, 230 parts of the component a solution and 115 parts of the component B colloid were uniformly dispersed by ultrasonic to obtain a high-salt high-alkali soil conditioner.
Example 10
The difference between this example and example 7 is that in step S3 of this example, 225 parts of the component a solution and 75 parts of the component B colloid are uniformly dispersed by ultrasonic to obtain the high-salt high-alkali soil conditioner.
Example 11
The comparative example differs from example 6 only in that no ferrous chloride was added.
Comparative example 1
The comparative example differs from example 1 only in that no shale was added, and the weight part of sepiolite was 40 parts.
Comparative example 2
The comparative example differs from example 1 only in that no sepiolite was added and the shale was 40 parts by weight.
Comparative example 3
This comparative example differs from example 1 only in that no octylphenol polyoxyethylene ether was added.
Application example 1 inner Mongolian Bayan, hull city Hangzhou Kongyan flag, shanfang dam town high-salinity soil treatment and improvement
The soil conditioner prepared in examples 1 to 11 and comparative examples 1 to 3 was diluted 100 times with water, irrigated with 10L/mu of irrigation amount to high salt soil (surface layer depth of 0 to 20cm soil, total amount of water soluble salt of 53.2g/kg, pH of soil of 9.3, water holding capacity of 85 g/kg) in the Shangjingyan-shan dam of Hangjingjingjingjingjingjingjingjingjingjingjingjingjigao, and the following performance test was performed on the soil with surface layer depth of 0 to 20cm after 14 d:
(1) determination of total amount of water-soluble salts in soil: according to NY/T1121.16-2006, soil detection part 16: determining the total amount of water-soluble salts in the soil after improvement;
(2) determination of soil pH: according to NY/T1121.2-2006, soil detection part 2: determination of soil pH the pH of the soil after improvement is determined;
(3) measurement of soil water retention: according to NY/T1121.22-2010 soil detection part 22: measurement of soil field Water holding capacity the water holding capacity of the improved soil was measured in the ring knife method.
The detection results are shown in the following table 1.
Table 1 results of improvement in soil treatment of high salinity soil in the late Hangzhou Kongkoku flag in inner Mongolia Bayan city
As can be seen from the data in the table, the soil conditioner prepared by the invention can effectively reduce the total amount of water-soluble salts in high-salinity soil and the pH value of soil, and effectively improve the water-holding capacity of soil. Example 4 in comparison with examples 2-3 shows that the soil amendment further reduces the salt content and the pH of the soil when the mass ratio of shale to sepiolite in the component A solution is 2:1. Comparison of example 5 with examples 6-10 shows that when the soil amendment comprises a component A solution and a component B colloid, the salt content and pH value of the soil can be further reduced, and the water holding capacity of the soil can be further improved. Comparison of examples 7-8 with examples 9-10 shows that the optimum mass ratio of component A solution to component B colloid ranges from 2-3:1. Comparison of example 6 and example 11 shows that ferrous chloride in the component B colloid helps to lower the pH of the soil. Comparison of example 1 and comparative examples 1-2 shows that the use of shale and sepiolite in combination can further reduce the salt content of the soil. Comparison of example 1 and comparative example 3 shows that the addition of the alkylphenol ethoxylates helps to reduce the salt content of the soil and increase the water holding capacity of the soil.
Sunflower is planted on the original high-salinity soil on the same area and the soil treated by the soil conditioner of the embodiment 9 respectively, the original soil sunflower cannot grow, and the yield per mu after treatment reaches 157 kg, so that the soil conditioner prepared by the invention can meet the actual requirements of high-salinity soil treatment and improvement.
Application example 2 improvement of soil in high alkaline land of Fu county of inner Mongolia Chifeng forest
The soil conditioner prepared in examples 1 to 11 and comparative examples 1 to 3 was diluted 50 times with water, irrigated to high alkaline land soil (surface layer depth 0 to 20cm soil, total amount of water soluble salt 7.3g/kg, soil pH 10.54, water holding capacity 105 g/kg) in the inner Mongolia Chilo-Feng Linxi county at 15L/mu, and the following performance test was performed on the soil with surface layer depth 0 to 20cm after 14 d:
(1) determination of total amount of water-soluble salts in soil: according to NY/T1121.16-2006, soil detection part 16: determining the total amount of water-soluble salts in the soil after improvement;
(2) determination of soil pH: according to NY/T1121.2-2006, soil detection part 2: determination of soil pH the pH of the soil after improvement is determined;
(3) measurement of soil water retention: according to NY/T1121.22-2010 soil detection part 22: measurement of soil field Water holding capacity the water holding capacity of the improved soil was measured in the ring knife method.
The detection results are shown in the following table 2.
Table 2 results of improvement in soil remediation in high alkaline land in the western county of inner mongolian forest
Comparison of example 4 with examples 2-3 shows that when the mass ratio of shale to sepiolite in the component A solution is 2:1, it helps to further reduce the salt content of the soil and the pH of the soil. Comparison of example 5 with examples 6-10 shows that when the soil amendment comprises a component a solution and a component B colloid, it helps to reduce the salt content and pH of the soil and increase the water holding capacity of the soil. Comparison of examples 7-8 with examples 9-10 shows that the optimum mass ratio of component A solution to component B colloid ranges from 2-3:1. Comparison of example 6 and example 11 shows that ferrous chloride in the component B colloid helps to lower the pH of the soil. Comparison of example 1 and comparative examples 1-2 shows that the use of shale and sepiolite in combination is beneficial to further reducing the salt content of the soil. The comparison of the example 1 and the comparative example 3 shows that the addition of the octyl phenol polyoxyethylene ether can effectively reduce the salt content of the soil and further improve the water holding capacity of the soil.
Corn is planted on the original high-alkaline land soil and the soil treated by the soil conditioner of the embodiment 9 on the same area respectively, the emergence rate is counted after 14d, the emergence rate of the original soil is 0%, and the emergence rate of the treated soil is 86%, which shows that the soil conditioner prepared by the invention can meet the actual requirements of high-alkaline land treatment and improvement.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The high-salt high-alkaline land soil conditioner is characterized by comprising a component A solution;
the component A solution comprises the following components in parts by weight: 25-65 parts of shale, 15-30 parts of sepiolite, 10-20 parts of octyl phenol polyoxyethylene ether and 80-200 parts of sulfuric acid solution.
2. The high salt and high alkali land soil amendment of claim 1, wherein the mass ratio of shale to sepiolite is 2:1.
3. The high-salt high-alkaline land soil conditioner according to claim 1, wherein the preparation method of the component A solution is as follows: adding shale, sepiolite and octyl phenol polyoxyethylene ether into the sulfuric acid solution, uniformly dispersing, and acidizing to obtain the component A solution.
4. The soil conditioner for high salt and high alkaline land according to claim 3, wherein the acidification reaction is carried out at a temperature of 50-60 ℃ for 24-36h.
5. The high-salt high-alkaline land soil conditioner according to claim 1, further comprising a component B colloid, wherein the component B colloid comprises the following components in parts by weight: 16-20 parts of chitosan, 15-20 parts of ferrous chloride, 30-70 parts of hydrochloric acid solution, 8-10 parts of poly (N, N-dimethylaminoethyl methacrylate) and 1-3 parts of cross-linking agent;
the mass ratio of the component A solution to the component B colloid is 2-3:1.
6. The high-salt and high-alkaline land soil conditioner of claim 5, wherein the mass ratio of the chitosan to the poly (N, N-dimethylaminoethyl methacrylate) is 2:1.
7. The high-salt and high-alkali soil conditioner according to claim 5, wherein the cross-linking agent is ethylene glycol diacid or glucuronic acid.
8. The high-salt high-alkaline land soil conditioner according to claim 5, wherein the preparation method of the component B colloid is as follows: dissolving ferrous chloride in hydrochloric acid solution, adding chitosan, heating and mixing until uniformity, obtaining pretreatment liquid, adding polymethyl methacrylate N, N-dimethylaminoethyl ester and a cross-linking agent into the pretreatment liquid, and dispersing uniformly, thus obtaining the component B colloid.
9. A method for preparing the high-salt high-alkaline land soil conditioner according to any one of claims 5 to 8, comprising the steps of: and uniformly dispersing the component A solution and the component B colloid to obtain the soil conditioner.
10. Use of a soil conditioner according to any one of claims 1 to 8 or obtained by the process of claim 9 for conditioning high salt and high alkaline land.
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| CN202311090023.1A CN117106457A (en) | 2023-08-28 | 2023-08-28 | High-salt high-alkaline land soil conditioner and preparation method and application thereof |
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