LU501007B1 - Water-retaining Agent for Sandy Soil and Method for Improving Water-holding Performance of Sandy Soil - Google Patents
Water-retaining Agent for Sandy Soil and Method for Improving Water-holding Performance of Sandy Soil Download PDFInfo
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- LU501007B1 LU501007B1 LU501007A LU501007A LU501007B1 LU 501007 B1 LU501007 B1 LU 501007B1 LU 501007 A LU501007 A LU 501007A LU 501007 A LU501007 A LU 501007A LU 501007 B1 LU501007 B1 LU 501007B1
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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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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B79/00—Methods for working soil
- A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
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- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Engineering & Computer Science (AREA)
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- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A water-retaining agent for sandy soil and a method for improving the water-holding performance of sandy soil, belonging to the technical field of land management. The water-retaining agent for sandy soil of the present invention comprises raw materials: acrylic acid, potassium polyacrylate, crosslinking agent, initiator, sodium bicarbonate, superphosphate, rice husk powder and composite bacteria. The preparation method comprises the following steps: preparing acrylic acid solution, adding sodium bicarbonate for reaction, then sequentially adding potassium polyacrylate, crosslinking agent, initiator, superphosphate and rice hull powder, performing irradiation treatment, and finally adding compound bacteria and stirring to obtain the water-retaining agent for sandy soil. The water-retaining agent for sandy soil of the invention has good water-retaining property, and after it is applied to sandy soil, it can also improve the content of organic matter in the soil and the pH value of the soil, thus providing a favorable environment for plant growth.
Description
DESCRIPTION HUS01007 Water-retaining Agent for Sandy Soil and Method for Improving Water-holding Performance of Sandy Soil
TECHNICAL FIELD The invention relates to the technical field of land management, in particular to a water-retaining agent for sandy soil and a method for improving the water-holding performance of sandy soil.
BACKGROUND Land desertification refers to the phenomenon that the topsoil loses its fine particles (silt and clay) and becomes sandy gradually due to soil erosion, or the invasion of quicksand (silt) leads to the decline or even loss of land productivity. Land desertification is mostly distributed in arid and semi-arid fragile ecological environment areas, or near the desert areas and open sand areas. The causes of land desertification are natural factors such as climate, as well as human activities such as overgrazing, deforestation, land reclamation and unreasonable utilization of water resources. Whether the land is desertified or not is related to the water balance of the soil. When the water supply of the soil is less than the loss, it tends to be desertified. Land desertification leads to the decrease of available land resources, the decline of land productivity and the intensification of natural disasters, etc. The large-scale spread of land desertification can turn into land desertification.
Based on the low adsorption of water and nitrogen by cultivated layer in sandy land, it is difficult for crops to survive. How to improve and rationally utilize sandy soil has become an important research content of agricultural development. At present, it has been reported that increasing organic matter can improve the structural properties of soil and the ability of soil to retain nutrients, so as to improve the land productivity. However, the nutrients in the soil are only one aspect that affects the planting of plants or crops. Whether the sandy soil can provide sufficient water and have good water holding capacity is also one of the key factors. Therefore, it is of great significance to study a kind of water-retaining agent for sandy soil and develop a method to improve the water-holding capacity of sandy soil, so as to solve a difficult problem that drought restricts the development of agriculture and forestry. 507007
SUMMARY The objective of the invention is to provide a water-retaining agent for sandy soil and a method for improving the water-holding performance of sandy soil. The water-retaining agent for sandy soil of the invention has good water-retaining property, and after it is applied to sandy soil, it can also improve the content of organic matter in the soil and the pH value of the soil, thus providing a favorable environment for plant growth. By planting plants on sandy soil, the water content of the land can be further kept stable, thus improving the water-holding capacity of sandy soil.
To achieve the above objective, the present invention provides the following scheme.
The first objective of the invention is to provide a water-retaining agent for sandy soil, which comprises the following raw materials in parts by weight: 40-50 parts of acrylic acid, 10-15 parts of potassium polyacrylate, 0.5-2 parts of crosslinking agent, 0.05-1 part of initiator, 25-30 parts of sodium bicarbonate, 5-10 parts of superphosphate, 10-15 parts of rice hull powder and 3-5 parts of compound bacteria.
Further, the crosslinking agent is 2-hydroxyethyl methacrylate or diacetone acrylamide.
Further, the initiator is ammonium persulfate and potassium persulfate mixed according to the mass ratio of 3:1.
Further, the complex bacteria include Bacillus subtilis, yeast and Bifidobacterium.
Further, the mass ratio of Bacillus subtilis, yeast and Bifidobacterium is 1:2:1.
Further, the rice hull powder is sieved with 80-100 meshes.
The second objective of the invention is to provide a preparation method of the water-retaining agent for sandy soil, which comprises the following steps: adding equal mass of water into acrylic acid to obtain acrylic acid solution, then adding sodium bicarbonate for reaction, then adding potassium polyacrylate, crosslinking agent, initiator, superphosphate and rice hull powder in turn, carrying out irradiation treatment, and finally adding compound bacteria and stirring to obtain water retaining agent for sandy soil. 7501007 Further, the reaction by adding sodium bicarbonate is at 50-60°C for 20-30 min; The irradiation treatment is carried out in a Co radiation field, and that irradiation dose is 1.5-2 kGy; After adding the compound bacteria, stir at 40-50°C for 1-2 h.
The third objective of the present invention is to provide a method for improving the water-holding performance of sandy soil, which comprises the following steps: uniformly applying the water-retaining agent for sandy soil into the sand layer, and planting vegetation.
Further, the application amount of the water-retaining agent for sandy soil is 20-25 tons/mu, and the specific application method is as follows: the sand layer of 15-20 cm is turned over, the water-retaining agent for sandy soil is evenly applied to the turned sand, and the above process is repeated by turning over the plough, and the ploughing interval is 10-15-20 cm.
Further, the vegetation is at least one of flower stick, sea buckthorn and sand-fixing grass.
The invention has the following technical effects: Acrylic acid is an organic acid and an important raw material for producing water-retaining agent. Sodium bicarbonate neutralizes and reacts with acrylic acid. The initiator is the mixture of ammonium persulfate and potassium persulfate according to the mass ratio of 3:1, which plays a catalytic role in the reaction of acrylic acid and sodium bicarbonate. The cross-linking agent is 2-hydroxyethyl methacrylate or diacetone acrylamide, which plays a cross-linking role. In addition, ammonium persulfate and potassium persulfate can also provide some sulfur, nitrogen and potassium, while superphosphate can provide a small amount of phosphorus and calcium, which is helpful to improve the soil structure in sandy land. Potassium polyacrylate can effectively inhibit water evaporation and prevent soil erosion. It can improve soil structure, promote the development of soil microorganisms and improve the recycling efficiency of soil organic matter. It has long service life, integrates the characteristics of various polymers, can absorb water repeatedly, expand and release contraction, absorb enough water in humid environment, and slowly release water to keep the surrounding soil moist in drought, which can adjust the water and fertilizer 507007 content in the soil. Rice hull powder, as an auxiliary raw material for water storage and water storage, provides necessary fertilizer for plant growth, and at the same time, improves the utilization rate of soil water and promotes plant growth. The addition of compound bacteria can transform nitrogen, phosphorus and potassium in the soil, improve the utilization rate of soil organic matter and reduce the loss of nutrients, so as to improve the soil structure, preserve water and nourish fields.
According to the invention, acrylic acid, potassium polyacrylate, crosslinking agent, initiator, sodium bicarbonate, superphosphate, rice husk powder and composite bacteria are reasonably selected and proportioned, and a water-retaining agent with excellent performance for sandy soil is obtained through the synergistic effect of all raw materials, and the water-retaining rate can reach 99.7% after 24 h at 40°C, and the water-retaining agent has good water-retaining property. At the same time, after being applied to sandy soil, the water-retaining agent of the invention can also improve the content of organic matter in the soil and the pH value of the soil, and can provide a favorable environment for plant growth. In addition, on the basis of applying the water-retaining agent, the invention also carries out plant planting, which can further keep the water content of the land stable, thus improving the water-holding performance of the sandy soil, and is of great significance for promoting the development of agriculture and forestry.
DESCRIPTION OF THE INVENTION Now, various exemplary embodiments of the present invention will be described in detail. This detailed description should not be considered as a limitation of the present invention, but should be understood as a more detailed description of some aspects, characteristics and embodiments of the present invention.
It should be understood that the terms used in this invention are only for describing specific embodiments, and are not used to limit the invention. In addition, for the numerical range in the present invention, it should be understood that each intermediate value between the upper limit and the lower limit of the range is also specifically disclosed. Any stated value or intermediate value within the stated range and any other stated value or every smaller range between intermediate values within 507007 the stated range are also included in the present invention. The upper and lower limits of these smaller ranges can be independently included or excluded from the range.
Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by the ordinary technicians in the field of this invention. Although the present invention only describes the preferred methods and materials, any methods and materials similar or equivalent to those described herein can also be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and/or materials related to the documents. In case of conflict with any incorporated documents, the contents of this specification shall prevail.
Without departing from the scope or spirit of the present invention, it is obvious to those skilled in the art that many modifications and changes can be made to the specific embodiments of the present invention. Other embodiments obtained from the description of the present invention will be obvious to the skilled person. The description and example of that present invention are exemplary only.
The words "include", "comprise", "have" and "contain" used in this paper are all open terms, which means including but not limited to.
In the invention, all raw materials are conventional commercial products.
Embodiment 1 (1) Taking 45 parts of acrylic acid, adding equal mass of water into acrylic acid to obtain acrylic acid solution, and then adding 28 parts of sodium bicarbonate to react at 55°C for 25 min; (2) Sequentially adding 12 parts of potassium polyacrylate, 1 part of 2-hydroxyethyl methacrylate, 0.08 part of initiator (ammonium persulfate and potassium persulfate are mixed in a mass ratio of 3:1), 7 parts of superphosphate and 12 parts of rice hull powder, and irradiating in a 60Co radiation field with an irradiation dose of 1.6 kGy; (3) Finally, 4 parts of compound bacteria (the mass ratio of Bacillus subtilis,
yeast and Bifidobacterium is 1:2:1) are added and stirred at 45°C for 1.5h to obtain 7501007 the water-retaining agent for sandy soil.
(4) Apply the water-retaining agent for sandy soil evenly in the sand layer, the application amount of water-retaining agent for sandy soil is 22 tons/mu, and the application depth is 18cm in the sand layer, then plant the flower stick, and sow 6kg flower stick seeds per mu.
Embodiment 2 (1) Taking 40 parts of acrylic acid, adding equal mass of water into acrylic acid to obtain acrylic acid solution, and then adding 25 parts of sodium bicarbonate to react at 50°C for 30 min; (2) Sequentially adding 10 parts of potassium polyacrylate, 0.5 part of diacetone acrylamide, 0.05 part of initiator (ammonium persulfate and potassium persulfate are mixed in a mass ratio of 3:1), 5 parts of superphosphate and 10 parts of rice hull powder, and performing irradiation treatment in a 60Co radiation field with an irradiation dose of 1.5 kGy; (3) Finally, add 3 parts of compound bacteria (the mass ratio of Bacillus subtilis, yeast and Bifidobacterium is 1:2:1) and stir at 40°C for 2 h to obtain the water-retaining agent for sandy soil.
(4) Apply the water-retaining agent for sandy soil evenly in the sand layer, the application amount of water-retaining agent for sandy soil is 20 tons/mu, and the application depth is 15cm deep in the sand layer, then plant the flower stick, and sow 6kg of flower stick seeds per mu.
Embodiment 3 (1) Taking 50 parts of acrylic acid, adding equal mass of water into acrylic acid to obtain acrylic acid solution, and then adding 30 parts of sodium bicarbonate to react at 60°C for 20 min; (2) Sequentially adding 15 parts of potassium polyacrylate, 2 parts of 2-hydroxyethyl methacrylate, 1 part of initiator (ammonium persulfate and potassium persulfate are mixed according to the mass ratio of 3:1), 10 parts of superphosphate and 15 parts of rice hull powder, and irradiating in a 60Co radiation field with the irradiation dose of 2 kGy; HUS01007 (3) Finally, add 5 parts of compound bacteria (the mass ratio of Bacillus subtilis, yeast and Bifidobacterium is 1:2:1) and stir at 50°C for 1 h to obtain the water-retaining agent for sandy soil.
(4) Apply the water-retaining agent for sandy soil evenly in the sand layer, the application amount of water-retaining agent for sandy soil is 25t/mu, and the application depth is 20cm in the sand layer, then plant the flower stick, and sow 6kg flower stick seeds per mu.
Comparative example 1 Same as Embodiment 1, except that no crosslinking agent is added.
Comparative example 2 Same as Embodiment 1, except that no initiator is added.
Comparative example 3 Same as Embodiment 1, except that rice hull powder is not added.
Comparative example 4 Same as Embodiment 1, except that compound bacteria are not added.
Comparative example 5 Same as Embodiment 1, except that no irradiation treatment is performed.
Results The water-retaining agent of each embodiment and comparative example was adsorbed by tap water and kept at 40°C for 24 h, and then the water-retaining rate is tested. The water-retaining rate = (initial water content per unit weight of water - retaining agent after being kept at 40°C for 24 hours)/(initial water content per unit weight of water-retaining agent). A control group without water-retaining agent was set up, and the performance of sandy soil and the control group with water-retaining agent applied in each example and comparative example were tested. The specific test indicators included the organic matter content of sandy soil and the pH value of the land, and the survival rate of flower stick and the soil moisture loss rate after 30 days were recorded as shown in Table 1 for specific test results.
Table 1 Water-reta ining rate | Organic Survival rate Soil moisture Group at 40°C content pH of flower loss rate (%) for 24 (g/kg) stick (%) hours (%) Comparative
95.4 28.6 7.3 92.3 35.5 example 1 Comparative
93.5 27.5 7.5 91.5 28.4 example 2 Comparative
95.6 22.3 7.5 85.6 20.1 example 3 Comparative
92.4 21.4 7.8 84.2 25.6 example 4 Comparative
93.2 27.6 7.7 90.2 18.5 example 5 As shown in Table 1, the water-retaining agent for sandy soil of the present invention has excellent performance of long-term water retention and slow water release, and can meet the requirement of plant growth on water. The water-retaining rate of the water-retaining agent of the present invention can reach 99.7% after 24h at 40°C, which indicates that the water-retaining property is excellent. At the same time, after being applied to sandy soil, the water-retaining agent of the invention can also improve the content of organic matter in the soil and the pH value of the soil, and can provide a favorable environment for plant growth. In addition, on the basis of applying the water-retaining agent, the invention also carries out plant planting, which 507007 can further keep the water content of the land stable, thus improving the water-holding performance of the sandy soil, and the technical scheme of the invention has wide application value.
The above embodiments only describe the preferred mode of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, all kinds of modifications and improvements made by ordinary technicians in the field to the technical scheme of the present invention should fall within the protection scope determined by the claims of the present invention.
Claims (10)
1. A water-retaining agent for sandy soil is characterized by comprising the following raw materials in parts by weight: 40-50 parts of acrylic acid, 10-15 parts of potassium polyacrylate, 0.5-2 parts of crosslinking agent, 0.05-1 part of initiator, 25-30 parts of sodium bicarbonate, 5-10 parts of superphosphate, 10-15 parts of rice hull powder and 3-5 parts of compound bacteria.
2. The water-retaining agent for sandy soil according to claim 1 is characterized in that the crosslinking agent 1s 2-hydroxyethyl methacrylate or diacetone acrylamide.
3. The water-retaining agent for sandy soil according to claim 1 is characterized in that the initiator is ammonium persulfate and potassium persulfate mixed according to the mass ratio of 3:1.
4. The water-retaining agent for sandy soil according to claim 1 is characterized in that the complex bacteria include Bacillus subtilis, yeast and Bifidobacterium.
5. The water-retaining agent for sandy soil according to claim 4 is characterized in that the mass ratio of Bacillus subtilis, yeast and Bifidobacterium is 1:2:1.
6. A preparation method of the water-retaining agent for sandy soil according to any one of claims 1-5 is characterized by comprising the following steps: adding equal mass of water into acrylic acid to obtain acrylic acid solution, then adding sodium bicarbonate for reaction, then adding potassium polyacrylate, crosslinking agent, initiator, superphosphate and rice hull powder in turn, carrying out irradiation treatment, and finally adding compound bacteria and stirring to obtain water retaining agent for sandy soil.
7. The preparation method of the water-retaining agent for sandy soil according to claim 6 is characterized in that the reaction by adding sodium bicarbonate is at 50-60°C for 20-30 min; the irradiation treatment is carried out in a “’Co radiation field, and that irradiation dose is 1.5-2 kGy; after adding the compound bacteria, stir at 40-50°C for 1-2 h.
8. A method for improving the water-holding performance of sandy soil is characterized in that uniformly applying the water-retaining agent for sandy soil according to any one of claims 1-5 into the sand layer, and planting vegetation.
9. The method for improving the water-holding performance of sandy soil 7501007 according to claim 8 is characterized in that the application amount of the water-retaining agent for sandy soil is 20-25 tons/mu and the ploughing interval is 10-15-20 cm.
10. The method for improving the water-holding performance of sandy soil according to claim 8 is characterized in that the vegetation is at least one of flower stick, sea buckthorn and sand-fixing grass.
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| Application Number | Priority Date | Filing Date | Title |
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| LU501007A LU501007B1 (en) | 2021-12-14 | 2021-12-14 | Water-retaining Agent for Sandy Soil and Method for Improving Water-holding Performance of Sandy Soil |
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| LU501007A LU501007B1 (en) | 2021-12-14 | 2021-12-14 | Water-retaining Agent for Sandy Soil and Method for Improving Water-holding Performance of Sandy Soil |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116855258A (en) * | 2023-07-10 | 2023-10-10 | 贵州省土壤肥料研究所(贵州省生态农业工程技术研究中心)(贵州省农业资源与环境研究所) | Salt-resistant agricultural water-retaining agent and preparation method thereof |
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2021
- 2021-12-14 LU LU501007A patent/LU501007B1/en active IP Right Grant
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116855258A (en) * | 2023-07-10 | 2023-10-10 | 贵州省土壤肥料研究所(贵州省生态农业工程技术研究中心)(贵州省农业资源与环境研究所) | Salt-resistant agricultural water-retaining agent and preparation method thereof |
| CN116855258B (en) * | 2023-07-10 | 2024-05-03 | 贵州省土壤肥料研究所(贵州省生态农业工程技术研究中心)(贵州省农业资源与环境研究所) | Salt-resistant agricultural water-retaining agent and preparation method thereof |
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