NL2036258A - Improving method for saline-alkali soil - Google Patents
Improving method for saline-alkali soil Download PDFInfo
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- NL2036258A NL2036258A NL2036258A NL2036258A NL2036258A NL 2036258 A NL2036258 A NL 2036258A NL 2036258 A NL2036258 A NL 2036258A NL 2036258 A NL2036258 A NL 2036258A NL 2036258 A NL2036258 A NL 2036258A
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- salt
- powder
- saline
- soil
- trap
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- 239000002689 soil Substances 0.000 title claims abstract description 124
- 239000003513 alkali Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002245 particle Substances 0.000 claims abstract description 68
- 239000000843 powder Substances 0.000 claims abstract description 56
- 230000006872 improvement Effects 0.000 claims abstract description 41
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 26
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 21
- 239000010439 graphite Substances 0.000 claims abstract description 21
- 150000001638 boron Chemical class 0.000 claims abstract description 10
- 150000003839 salts Chemical class 0.000 claims description 93
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 22
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 239000011701 zinc Substances 0.000 claims description 11
- 229910052725 zinc Inorganic materials 0.000 claims description 11
- 150000002696 manganese Chemical class 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 150000002751 molybdenum Chemical class 0.000 claims description 4
- 159000000000 sodium salts Chemical class 0.000 claims description 4
- 230000001788 irregular Effects 0.000 claims description 2
- 230000001404 mediated effect Effects 0.000 abstract description 62
- 239000011573 trace mineral Substances 0.000 abstract description 12
- 235000013619 trace mineral Nutrition 0.000 abstract description 12
- 239000000203 mixture Substances 0.000 abstract description 11
- 230000004083 survival effect Effects 0.000 abstract description 11
- 238000003487 electrochemical reaction Methods 0.000 abstract description 9
- 238000009472 formulation Methods 0.000 abstract description 5
- 238000012216 screening Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 22
- 238000002360 preparation method Methods 0.000 description 15
- 239000007788 liquid Substances 0.000 description 11
- 229910021380 Manganese Chloride Inorganic materials 0.000 description 9
- GLFNIEUTAYBVOC-UHFFFAOYSA-L Manganese chloride Chemical compound Cl[Mn]Cl GLFNIEUTAYBVOC-UHFFFAOYSA-L 0.000 description 9
- 229940099607 manganese chloride Drugs 0.000 description 9
- 235000002867 manganese chloride Nutrition 0.000 description 9
- 239000011565 manganese chloride Substances 0.000 description 9
- 229910021538 borax Inorganic materials 0.000 description 8
- 235000010339 sodium tetraborate Nutrition 0.000 description 8
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 230000002950 deficient Effects 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 229910021645 metal ion Inorganic materials 0.000 description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 244000068988 Glycine max Species 0.000 description 2
- 235000010469 Glycine max Nutrition 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910001437 manganese ion Inorganic materials 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000002681 soil colloid Substances 0.000 description 2
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 244000061176 Nicotiana tabacum Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 238000005370 electroosmosis Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000009335 monocropping Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- -1 sodium borate manganese Chemical compound 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- 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
- C09K17/02—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only
- C09K17/04—Soil-conditioning materials or soil-stabilising materials containing inorganic compounds only applied in a physical form other than a solution or a grout, e.g. as granules or gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
- B09C1/085—Reclamation of contaminated soil chemically electrochemically, e.g. by electrokinetics
-
- 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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The present invention provides an improving method for saline-alkali soil. By adopting electrical improvement, screening a formulation of mediated particles, preparing the mediated particles from graphite, a metal powder, a boron salt and the like and adjusting the proportion of various components in the mediated particles according to the composition of the saline-alkali soil, the content of trace elements in the improved saline-alkali soil can be increased, the crop survival rate can be increased, and 10 meanwhile, the electrochemical reaction efficiency can be improved.
Description
IMPROVING METHOD FOR SALINE-ALKALI SOIL
[0001] The present invention belongs to the technical field of soil improvement, and specifically relates to an improving method for saline-alkali soil.
[0002] Saline-alkali soil refers to an area where normal growth of crops is affected by the content of salt in soil. According to incomplete statistics of United Nations Educational,
Scientific and Cultural Organization and Food and Agriculture Organization, the whole world has a saline-alkali soil area of 954.38 million hectares, in which China has 99.13 million hectares. The formation of alkali soil and alkali-affected soil in China is mostly related to accumulation of carbonate in soil, so that the alkalinity degree is generally high, and plants can hardly survive in severe saline-alkali soil areas. Due to diverse reasons of the saline-alkali soil, long-term and repeated improvement is required.
[0003] During treatment of soil with a direct current, an electrochemical reaction between electrodes, soil and an aqueous salt and electrophoresis, electroosmosis and an electromigration reaction between soil colloids will occur, accompanied by gas extraction, liquid extraction, saline-alkali chemical conversion and other linkage processes. Electrical improvement of the saline-alkali soil refers to a process of reducing the content of salt and alkali in soil and changing a physical structure of the soil by means of an electrochemical reaction between electrodes of a salt solution in the saline-alkali soil and electrodynamie characteristics between soil colloids and an aqueous salt.
[0004] Documents show that scientific research and practice have been carried out on improvement of the saline-alkali soil in many countries. It has been reported in documents that electricity has an obvious effect of regulating the pH and electrical conductivity of soil. It has also been reported that a point treatment process requires sufficient water and electricity, which also limits technological progress and application of the electrical improvement.
Domestic documents, about the electrical improvement of soil, are mostly focused on electrode reactions, and the overall electrical improvement of soil is in lack of systematic research on the electrical conductivity, the pH, the sodium ion content and the sulfate ion content. A scientific research project of combining electrical improvement with aquatic plants to improve soda-type saline-alkali soil has been reported, which is also only limited to mildly saline-alkali soil and has an unsatisfactory improvement effect.
[0005] CN206978270U discloses a planting field structure for repairing continuous cropping obstacles in tobacco field soil. However, mediated particles prepared from pure graphite are used, which have a monotonous effect and a limited improvement effect on the saline-alkali soil.
[0006] Therefore, it is urgent to find a better improving method for the saline-alkali soil.
[0007] In order to solve the above problems, the purpose of the present invention is to provide an improving method for saline-alkali soil.
[0008] On the one hand, the present invention provides an improving method for saline-alkali soil. The method includes the following steps:
[0009] (1) disposing a main cathode salt trap, a main anode salt trap and auxiliary salt traps on saline-alkali soil;
[0010] (2) evenly distributing mediated particles in soil between the main cathode salt trap and the main anode salt trap, where the mediated particles include graphite, a metal powder and a salt powder and have a spherical appearance or another appearance in an irregular shape: and
[0011] (3) connecting a power supply for energizing to electrically improve the saline-alkali soil.
[0012] In the present invention, electrical improvement is carried out by disposing the main cathode salt trap and the main anode salt trap in the saline-alkali soil, the salt trap is also called an electrode trap, and each salt trap is composed of a well channel and an electrode. An output voltage of the power supply is directly applied to the main electrode salt traps. Auxiliary electrode salt traps are also disposed between the main cathode salt trap and the main anode salt trap, electrodes are also disposed in the auxiliary salt traps to achieve both an effect of an electrochemical reaction source and the effect of gathering saline-alkali water, and the traps are disposed at a spacing of 5-15 m. Improvement of the saline-alkali soil also requires water injection, and a water source is introduced from the main anode salt trap until the soil reaches a saturated water state.
[0013] During electrical improvement of the saline-alkali soil. the number of electrochemical reaction points in the soil can be increased by disposing the mediated particles in the soil between the salt traps and the auxiliary salt traps. More reaction points indicate larger changes of the pH, so that an electrical improvement effect on the saline-alkali soil is improved.
However, existing mediated particles are usually prepared from a single conductive component, thus having a relatively monotonous effect and an unsatisfactory improvement effect on the saline-alkali soil.
[0014] The mediated particles provided by the present invention are mainly prepared by mixing a graphite powder, a metal powder, a salt powder and the like. In research of an electrochemical improvement mechanism and an effect on the saline-alkali soil and the electrical improvement of the saline-alkali soil, the mediated particles not only provide an electrochemical reaction center of a soil solution, but also more importantly, can provide deficient trace elements for the saline-alkali soil, so as to help improve the saline-alkali soil, enhance an improvement effect and improve growth conditions of crops in a later period.
[0015] The solubility of zinc, copper. iron, boron and the like in the mediated particles is increased due to the increase of the pH value. Therefore, as the pH value is changed by a redox reaction of the electrochemical reaction center of the mediated particles during the electrical improvement, the zinc, the copper, the iron and the boron are converted from a metallic state to soluble metal ions and from a solidified powder state to a dissolved state, and these soluble metal ions will dissolve out of the mediated particles and enter the soil, so that the improved saline-alkali soil has increased content of trace elements and a higher crop survival rate. The mediated particles obviously have a better effect than the existing mediated particles.
[0016] Further, in step (2), the metal powder includes any one or more of a copper powder. a zinc powder and an iron powder; and the salt powder includes any one or more of a sodium salt, a manganese salt, a molybdenum salt and a boron salt.
[0017] Further, according to calculation by mass percentage, the content of the graphite powder is 0.1-95%, the content of the metal powder is 0.01-6%, and the content of the salt powder is 0.01-6%.
[0018] Further, the mediated particles include 50-90% of a graphite powder, 2-5% of a zine powder, 2-5% of an iron powder, 2-5% of a manganese salt and 2-5% of a boron salt.
[0019] Further, the mediated particles have a spherical appearance and a diameter of 1-5 cm.
[0020] Further, the mediated particles are distributed at a depth of 10-40 cm from the ground surface, and the soil may contain 4-6 mediated particles per square meter.
[0021] The mediated particles may be evenly distributed in the soil between the main cathode salt trap and the main anode salt trap and distributed at a depth of 10-40 cm from the ground surface, and the soil may contain 4-6 mediated particles per square meter.
[0022] Further, in step (1), the main cathode salt trap, the main anode salt trap and the auxiliary salt traps are well channels, and electrodes are disposed in the well channels.
[0023] Further, the main cathode salt trap and the main anode salt trap are located at two ends of the saline-alkali soil, respectively, and the auxiliary salt traps are evenly disposed between the main cathode salt trap and the main anode salt trap at an equal distance.
[0024] On the other hand. the present invention provides mediated particles. The mediated particles include 50-90% of a graphite powder, 2-5% of a zinc powder, 2-5% of an iron powder, 2-5% of a manganese salt and 2-5% of a boron salt.
[0025] On another hand, the present invention provides use of a mixture in preparation of mediated particles for increasing the crop survival rate of saline-alkali soil. The mediated particles include graphite, a metal powder and a salt powder; the metal powder includes any one or more of a manganese powder, a copper powder, a zinc powder and an iron powder; and the salt powder includes any one or more of a sodium salt, a manganese salt, a molybdenum salt and a boron salt.
[0026] On another hand, the present invention provides use of a mixture in preparation of mediated particles for increasing the content of trace elements in saline-alkali soil. The mediated particles include graphite, a metal powder and a salt powder; the metal powder includes any one or more of a manganese powder, a copper powder, a zinc powder and an iron powder; and the salt powder includes any one or more of a sodium salt, a manganese salt, a molvbdenum salt and a boron salt.
[0027] Further, the metal powder includes any one or more of a copper powder, a zinc powder and an iron powder; and the salt powder includes any one or more of a manganese salt. a molybdenum salt and a boron salt.
[0028] Further, according to calculation by mass percentage, the content of the graphite powder is 0.1-95%, the content of the metal powder is 0.01-6%, and the content of the salt powder is 0.01-6%.
[0029] According to the mediated particles provided by the present invention, the proportion of the metal powder and the salt powder in the mediated particles can be adjusted according to the composition of the saline-alkali soil, so as to rationally supplement deficient trace elements for the saline-alkali soil, improve the electrochemical reaction efficiency and increase the crop survival rate of the improved saline-alkali soil.
[0030] In some embodiments, as a manganese nutrient in the saline-alkali soil usually stays in a seriously deficient state. manganese ions are added into the mediated particles, and the 5 manganese ions in the mediated particles are released into the soil during electrical improvement, so as to improve the saline-alkali soil.
[0031] Further, the mediated particles include 50-90% of a graphite powder, 2-5% of a zinc powder, 2-5% of an iron powder, 2-5% of a manganese salt and 2-5% of a boron salt.
[0032] The present invention has the following beneficial effects.
[0033] (1) As a metal powder and a salt powder are added into mediated particles, zinc, copper, iron and boron are converted from a metallic state to soluble metal ions and from a solidified powder state to a dissolved state when the pH is changed during electrical improvement of the saline-alkali soil. and the metal ions in the mediated particles will precipitate out and enter the saline-alkali soil, so that the improved saline-alkali soil has increased content of trace elements and an increased crop survival rate.
[0034] (2) The electrochemical reaction efficiency can also be improved by adding the metal powder and the salt powder into the mediated particles.
[0035] (3) The proportion of the metal powder and the salt powder in the mediated particles can be adjusted according to the composition of the saline-alkali soil, so as to enhance an improvement effect on the saline-alkali soil.
[0036] Example 1 Preparation of mediated particles provided by the present invention
[0037] A method for preparing the mediated particles in the example is as follows.
[0038] According to calculation by mass part, 84 parts of a conductive graphite powder (500 mesh), 3 parts of a zinc powder (500 mesh), 3 parts of an iron powder (500 mesh), 5 parts of anhydrous manganese chloride and 5 parts of sodium borate were weighed. evenly mixed and pressed into spherical particles with a diameter of 1 cm by a mold.
[0039] Example 2 Electrical improvement process of saline-alkali soil
[0040] Saline-alkali soil treated in the example was soda-type saline-alkali soil with a length of 98 m, a depth of 9 m and a width of 75 m. A main cathode salt trap and a main anode salt trap were disposed at two diagonal ends of the saline-alkali soil. respectively, and a plurality of auxiliary salt traps were disposed in the saline-alkali soil, where the main cathode salt trap, the main anode salt trap and the auxiliary salt traps had a length of 40 m, a depth of 30 m and a width of 20 m, the auxiliary salt traps were disposed at an equal spacing of 80 cm, and the auxiliary salt traps were disposed at a distance of 80 cm from the main cathode salt trap and the main anode salt trap. The mediated particles prepared in Example 1 were evenly distributed in the soil between the main cathode salt trap and the mam anode salt trap and distributed at a depth of 30 cm from the ground surface, and the soil may contain 6 mediated particles per square meter.
[0041] A power supply was used at a voltage of 80 volts (output current of 3A/m?), and electrodes were prepared from a graphite material and inserted into the soil at a depth of 40 cm.
Water was continuously supplied in a treatment process. In the treatment process, physical and chemical indexes of extracted liquids of the main cathode salt trap, the main anode salt trap and the auxiliary salt traps were regularly detected, including the pH, the salinity and EC (ms/cm) (electrical conductivity of soil). During extraction, the salt trap liquids were introduced into downstream trenches and pumped with a pump. Detection results of the extracted liquids of the main anode salt trap and the main cathode salt trap are shown in Table
I and Table 2, respectively, and detection results of the extracted liquids of the auxiliary salt traps are shown in Table 3 (higher salinity of an extracted liquid indicates a better desalting effect).
Table 1 Measured values of physical and chemical indexes of an extracted liquid of a main anode (+) salt trap before and after electrical improvement of soda-type saline-alkali soil
Table 2 Measured values of physical and chemical indexes of an extracted liquid of a main cathode (-) salt trap before and after electrical improvement of soda-type saline-alkali soil
Table 3 Measured values of physical and chemical indexes of extracted liquids of auxiliary salt traps before and after electrical improvement of soda-type saline-alkali soil
[0042] Soil cavity liquid conditions in a non-salt trap electrochemical reaction area were also investigated after electrical improvement was carried out for 4 hours in the example. Results are shown in Table 4.
Table 4 Measured values of physical and chemical indexes of extracted liquids before and after electrical improvement of soda-type saline-alkali soil
[0043] As can be seen from Table 4, after the treatment is carried out for 4 hours, the pH of the soil in the non-salt trap electrochemical reaction area is decreased to neutral, and the electrical conductivity EC::s (1:5 represents a measured value at a soil-water ratio of 1:5 when the soil is water-saturated) is decreased significantly by 65.8%.
[0044] Example 3 Effects of components of different mediated particles on trace elements in improved saline-alkali soil
[0045] In the example, mediated particles were prepared by the method provided in Example 1, where the following 6 types of components of the mediated particles were used separately: 1, separate use of 100 parts of graphite for preparation; 2, separate use of 100 parts of an iron powder for preparation; 3, use of 84 parts of graphite and a metal powder (including 3 parts of an iron powder and 3 parts of a zinc powder) for preparation; 4, use of graphite and a metal powder (including 3 parts of a copper powder and 3 parts of a zinc powder) for preparation; 5, use of graphite and a salt powder (including 5 parts of manganese chloride and 5 parts of sodium borate) for preparation; and 6, use of graphite, a metal powder and a salt powder (including 3 parts of a copper powder, 3 parts of a zinc powder, 5 parts of manganese chloride and 5 parts of sodium borate) for preparation. The mediated particles prepared according to
Example 1 were used, and saline-alkali soil was improved by the method provided in Example 2. After the treatment was carried out for 240 minutes, effects of the mediated particles of different formulations on the content of trace elements in the improved saline-alkali soil were investigated. Results are shown in Table 5.
Table 5 Effects of mediated particles of different formulations on the content of trace elements in improved saline-alkali soil
Salinity ppt
Group Mediated particles (auxiliary salt Trace elements trap) powder zing in soil powder zing in soil sodium borate manganese in soil
Graphite, copper powder, zinc Increased content of 6 powder, manganese chloride and 30.7 zinc and manganese in sodium borate soil
[0046] As can be seen from Table 5, the content of trace elements in the improved saline- alkali soil can be significantly increased by using the mediated particles provided by the present invention, and an improvement effect on the saline-alkali soil is also benefited.
[0047] Example 4 Effects of components of different mediated particles on the crop survival rate of improved saline-alkali soil
[0048] In the example, mediated particles were prepared by the method provided in Example 1, where the following 6 types of components of the mediated particles were used separately: 1, separate use of 100 parts of graphite for preparation; 2, separate use of 100 parts of an iron powder for preparation; 3, use of 84 parts of graphite and a metal powder (including 3 parts of an iron powder and 3 parts of a zinc powder) for preparation; 4, use of graphite and a metal powder (including 3 parts of a copper powder and 3 parts of a zinc powder) for preparation: 3, use of graphite and a salt powder (including 5 parts of manganese chloride and 5 parts of sodium borate) for preparation, and 6, use of graphite, a metal powder and a salt powder (including 3 parts of a copper powder, 3 parts of a zinc powder, 5 parts of manganese chloride and 5 parts of sodium borate) for preparation. The mediated particles prepared according to
Example 1 were used, and saline-alkali soil was improved by the method provided in Example 2. After the treatment was carried out for 240 minutes to complete improvement, soybeans were planted, and effects of the mediated particles of different formulations on the survival rate of soybeans in the improved salme-alkali soil were investigated. Results are shown in Table 6.
Table 6 Effects of mediated particles of different formulations on the crop survival rate of improved saline-alkali soil
Graphite, iron powder and zinc powder i Graphite, manganese chloride
Graphite, copper powder, zinc 6 powder, manganese chloride and 30.5 95.8 sodium borate
[0049] As can be seen from Table 6, the crop survival rate of the improved saline-alkali soil can be significantly increased by using the mediated particles provided by the present invention,
[0050] Example 5 Requirements for component proportions of mediated particles in different saline-alkali soils
[0051] In the example, soil composition analysis was separately carried out on four saline- alkali soils, including saline-alkali soil 1, saline-alkali soil 2, salme-alkali soil 3 and saline- alkali soil 4, where a metal powder including a zinc powder and an iron powder at a ratio of 1:1 was used, and a salt powder including anhydrous manganese chloride and sodium borate at aratio of 1:1 was used. Corresponding component proportions of mediated particles were designed, as shown in Table 7.
Table 7 Component proportions of mediated particles in different saline-alkali soils
[0052] Mediated particles were separately prepared according to proportions of mediated particles provided in Table 7. the saline-alkali soils were electrically improved by the method provided in Example 2, and sovbeans were planted after the improvement was completed.
Results are shown in Table 8.
Table 8 Evaluation of improvement effects of different mediated particles on saline-alkali soils
Saline-alkali soil Salinity ppt Crop survival rate (%)
Saline-alkali soil Increased content of zinc in 29.8 | 88.5 1 soil
Saline-alkali soil Increased content of zinc in 30.1 89.7 2 soil
Saline-alkali soil Increased content of zinc and 30.5 — 91.3 3 manganese in soil
Saline-alkali soil Increased content of zinc and 30.6 oo 96.1 4 manganese in soil
[0053] As can be seen from Table 8, all deficient trace elements in the saline-alkali soils are supplemented correspondingly, and the crop survival rate is significantly improved, where the mediated particles preferably include graphite, a metal powder and a salt powder in a proportion of 84:6:10.
Claims (8)
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206978270U (en) | 2017-07-28 | 2018-02-09 | 湖南省烟草公司衡阳市公司 | A kind of plantation field structure for repairing vega soil continuous cropping obstacle |
| CN109772874A (en) * | 2018-12-29 | 2019-05-21 | 农业部环境保护科研监测所 | A kind of device and method recycling electric energy and synchronous desalination from petroleum hydrocarbon contaminated saline-alkali soil |
| US20220088652A1 (en) * | 2020-09-21 | 2022-03-24 | Terran Corporation | Electrokinetic soil desalinization system providing enhanced chloride removal and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206978270U (en) | 2017-07-28 | 2018-02-09 | 湖南省烟草公司衡阳市公司 | A kind of plantation field structure for repairing vega soil continuous cropping obstacle |
| CN109772874A (en) * | 2018-12-29 | 2019-05-21 | 农业部环境保护科研监测所 | A kind of device and method recycling electric energy and synchronous desalination from petroleum hydrocarbon contaminated saline-alkali soil |
| US20220088652A1 (en) * | 2020-09-21 | 2022-03-24 | Terran Corporation | Electrokinetic soil desalinization system providing enhanced chloride removal and method |
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| NL2036258B1 (en) | 2024-05-30 |
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