CN107418585B - Saline-alkali soil conditioner - Google Patents
Saline-alkali soil conditioner Download PDFInfo
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- CN107418585B CN107418585B CN201710608268.7A CN201710608268A CN107418585B CN 107418585 B CN107418585 B CN 107418585B CN 201710608268 A CN201710608268 A CN 201710608268A CN 107418585 B CN107418585 B CN 107418585B
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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
- C09K17/14—Soil-conditioning materials or soil-stabilising materials containing organic compounds only
- C09K17/18—Prepolymers; Macromolecular compounds
- C09K17/20—Vinyl polymers
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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
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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
- C09K2109/00—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE pH regulation
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- Chemical & Material Sciences (AREA)
- 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 belongs to the technical field of agriculture, and particularly relates to a saline-alkali soil conditioner which comprises the following components in parts by weight: 30-60 parts of polymaleic acid, 10-30 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid multipolymer, 1-2 parts of surfactant and 100 parts of water. The invention not only overcomes the toxicity problem of polyacrylamide degradation products, but also improves the soil fertility and the deterioration of granular structure caused by using single acidic substances such as the poly cis-ene succinic acid to reduce the pH value of the soil, can effectively change the salt content of the saline-alkali soil, reduce the alkalinity of the saline-alkali soil, simultaneously can improve the granular state of the soil and also improve the water retention performance of the soil. Meanwhile, the preparation is simple, the cost is low, and the continuous production is convenient; the liquid form is convenient and uniform for spraying; no toxicity, no harm, no pollution, environment friendship, etc.
Description
Technical Field
The invention relates to the technical field of agriculture, in particular to a saline-alkali soil conditioner.
Background
Saline-alkali soil is a general term for various types of soil affected by saline-alkali components in soil, including saline soil and alkaline earth, which are often symbiotic due to formation causes. The salt components in the saline-alkali soil are harmful salts such as sodium chloride, sodium sulfate, sodium bicarbonate and sodium carbonate, or exchangeable sodium in the soil accounts for a certain proportion of cation exchange capacity. Saline-alkali soil has the following characteristics: high pH value, harmful salts, poor air permeability, easy hardening and low fertility.
Land salinization is a worldwide problem faced by human beings, and China has a large area of salinization land which is mainly distributed in North China plain, northeast plain, northwest inland region and coastal region. The survival rate of plants planted in saline-alkali soil is generally very low, so that the agricultural and forestry production of China is seriously influenced. The research on effective measures for treating the saline-alkali soil, the transformation of the saline-alkali soil and the control of the further improvement of the ecosystem are important measures related to the sustainable development road of China.
At present, the main saline-alkali soil improvement comprises cultivation fertilization, water conservancy measures, chemical measures and the like, and the type of the improvement agent comprises solid and liquid. The commonly used natural materials include gypsum, fly ash, peat, humic acid and the like with large dosage and inconvenient use
Artificially synthesized organic polymers such as: polyacrylamide (PAM) as an efficient water and fertilizer retention material and CN102517030A as sodium ion (Na)+) The adsorbent is used for improving soil, but an intermediate product of PAM degradation is acryloyl, ammonium is toxic, and whether the application of PAM as a soil conditioner causes soil pollution or not is worthy of further attention and intensive research in the long run
Patent publication No. CN1317539A discloses a soil conditioner consisting of poly cis-ene succinic acid, sodium alkyl benzene sulfonate and water, and has the advantages of simple preparation process, low cost, convenient operation and the like. The principle is that single acid is used for reducing the pH value angle to carry out alkali reduction and salt removal, but improvement on the aspects of fertility improvement, soil structure and the like needs to be further improved.
Disclosure of Invention
The invention aims to provide a saline-alkali soil improver which is easy to prepare, has low cost and effectively reduces the salt content and the pH value, and a preparation method thereof.
The technical content of the invention is as follows:
the saline-alkali soil conditioner comprises the following components in parts by weight:
30-60 parts of polymaleic acid
10-30 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid multipolymer
1-2 parts of surfactant
Water is supplemented to 100 portions
Further, the saline-alkali soil improver comprises the following components in parts by mass:
40-50 parts of polymaleic acid
15-25 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid multipolymer
1-2 parts of surfactant
Water is supplemented to 100 portions
The invention also provides a preparation method of the soil conditioner, which comprises the following steps:
1. firstly, dissolving polymaleic acid by using water,
2. and sequentially adding the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid multipolymer and the surfactant under stirring, and uniformly mixing to obtain the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid multipolymer.
The molecular weight of the polymaleic acid used is between 200 and 1000, preferably 500 and 1000, and the most preferred is: 800-1000.
The molecular weight of the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid multipolymer is between 1000-10000, and the mass ratio of acrylic acid to sulfonate can be (30-70): (70-30), and the optimal ratio is 70: 30.
The polymaleic acid and acrylic acid-2-acrylamide-2-methylpropanesulfonic acid multipolymer are common high molecular polymers,
the surfactant is at least one of sodium dodecyl benzene sulfonate, sodium alkyl diphenyl ether disulfonate and JFC.
The principle of the soil conditioner of the invention is as follows:
the contained polymaleic acid component belongs to low molecular weight polyelectrolyte, is an anionic organic acid, can complex high-valence ions in soil, increases the content of soluble high-valence ions in the soil, replaces a large amount of sodium ions adsorbed by soil colloid through ion exchange effect, can seep below a plough layer along with water, reduces the content of soluble salt in the soil, and reacts with carbonate ions and bicarbonate ions which cause alkalinity rise in the soil to generate water and carbon dioxide, so that the alkalinity of the soil is directly reduced;
the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid multipolymer contained in the soil stabilizer is a high polymer simultaneously having weak acidic groups and strong acidic groups, can capture various metal ions and phosphate ions in the soil, has strong dispersing function, keeps the soil loose, and can neutralize the alkalinity of saline-alkali soil and reduce the pH value of the soil;
the surfactant can change the surface activity of soil and make the effective components fully play a role.
Through the comprehensive action, the toxicity problem of polyacrylamide degradation products is solved, the soil fertility and the deterioration of granular structures caused by reducing the pH value of soil by using single acidic substances such as poly cis-ene succinic acid are also improved, the salt content of saline-alkali soil can be effectively changed, the alkalinity of the saline-alkali soil is reduced, the granular state of the soil can be improved, and the water retention performance of the soil is improved.
Comprehensively, the soil conditioner of the invention has the following characteristics:
1. the preparation is simple, the cost is low, and the continuous production is convenient;
2. the liquid form is convenient and uniform for spraying;
3. the salt content of the soil is effectively reduced, and the harmful salt content of the soil is reduced;
4. the pH value of the soil is quickly reduced, the time is short, and the effect is quick;
5. the soil particle structure is improved, the soil is loosened, and the water retention function is realized;
6. no toxicity, no harm, no pollution and environment friendship.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention.
Example 1
According to the preparation method, the saline-alkali soil improver comprises the following components in parts by mass:
example 2:
according to the preparation method, the saline-alkali soil improver comprises the following components in parts by mass:
example 3:
according to the preparation method, the saline-alkali soil improver comprises the following components in parts by mass:
example 4:
according to the preparation method, the saline-alkali soil improver comprises the following components in parts by mass:
example 5:
according to the preparation method, the saline-alkali soil improver comprises the following components in parts by mass:
example 6:
according to the preparation method, the saline-alkali soil improver comprises the following components in parts by mass:
example 7:
according to the preparation method, the saline-alkali soil improver comprises the following components in parts by mass:
the field implementation effect is as follows:
performing a test on a dredger fill greening demonstration land near a harbor siphon road in a south harbor industrial park in a new Tianjin coastal area, selecting two areas treated by the same improvement scheme to perform a water spraying desalination test, wherein in the test 1, urban pipe network water is adopted without adding the soil conditioner; experiment 2 the soil conditioner of example 1, in which 0.04% of city pipe network water is added, is used, and the results of measuring the change of the pH value of the saline-alkali soil are as follows:
| number of times of irrigation | Original soil | After 1 time | After 2 times | After 3 times |
| pH value (test 1) | 8.58 | 8.50 | 8.65 | 8.84 |
| pH value (test 2) | 8.58 | 7.92 | 7.68 | 7.42 |
It can be seen that the soil conditioner of the invention is used for carrying out the water spraying desalination test, the pH value of the soil is obviously reduced, the reduction range is as high as 7.7%, the following two times are maintained at about 3%, and the soil conditioner can reach the near neutral standard after three times of treatment.
Meanwhile, the state of the treated soil is observed, and the obvious granular structure of the soil in the test 2 group is good and loose, which is also the effect result of the technical scheme of the invention.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications and equivalents made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A saline-alkali soil conditioner is characterized in that: the composition comprises the following components in parts by mass:
30-60 parts of polymaleic acid
10-30 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid multipolymer
1-2 parts of surfactant
Water is supplemented to 100 portions
The molecular weight of the polymaleic acid is between 800-1000, and the molecular weight of the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid multipolymer is between 1000-10000;
the mass ratio of the acrylic acid to the sulfonate is (30-70): (70-30).
2. A saline-alkali soil amendment according to claim 1, characterized in that: further, the feed additive comprises the following components in parts by mass:
40-50 parts of polymaleic acid
15-25 parts of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid multipolymer
1-2 parts of surfactant
Water is supplemented to 100 portions
The molecular weight of the polymaleic acid is between 800-1000, and the molecular weight of the acrylic acid-2-acrylamide-2-methylpropanesulfonic acid multipolymer is between 1000-10000;
the mass ratio of the acrylic acid to the sulfonate is (30-70): (70-30).
3. A saline-alkali soil amendment according to claim 1 or 2, characterized in that: the mass ratio of acrylic acid to sulfonate was 70: 30.
4. A saline-alkali soil amendment according to claim 1 or 2, characterized in that: the surfactant is at least one of sodium dodecyl benzene sulfonate, sodium alkyl diphenyl ether disulfonate and JFC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710608268.7A CN107418585B (en) | 2017-07-24 | 2017-07-24 | Saline-alkali soil conditioner |
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| CN201710608268.7A CN107418585B (en) | 2017-07-24 | 2017-07-24 | Saline-alkali soil conditioner |
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| CN107418585B true CN107418585B (en) | 2020-11-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112457855B (en) * | 2019-09-09 | 2022-01-04 | 中国石油化工股份有限公司 | Composition for repairing heavy metal soil, application thereof and method for repairing heavy metal soil |
| CN112110763A (en) * | 2020-08-14 | 2020-12-22 | 兰州新区市政设计研究院有限公司 | Improved compound fertilizer for moderate saline-alkali soil and secondary saline-alkali soil |
| CN113999680B (en) * | 2021-11-08 | 2023-03-24 | 中国科学院兰州化学物理研究所 | Organic polymer saline soil modifier and preparation method thereof |
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