Method and system for testing salt reducing effect formed by mixing different media and severe saline alkali soil

Abstract

The invention discloses a method and a system for testing a salt reducing effect formed by mixing different media with severe saline-alkali soil, which are characterized in that media such as mushroom dregs, switchgrass straw crushed residues, cotton stalk residues, fly ash residues and fly ash fine ash are mixed with saline-alkali soil according to a specific volume ratio, and conductivity detection and biological experiments are combined, so that the salt reducing effect formed by mixing different media with the severe saline-alkali soil is tested. And a medium formula for efficiently reducing salt is quickly screened out. Comprising the steps that square pits are dug in saline-alkali land blocks with the salt content being 2% or above, mixtures of media and saline-alkali soil are filled according to different volume ratios, and the top soil conductivity is detected every day after water injection saturation till stability is achieved; emergence rate and biomass experiments are synchronously carried out, and a medium combination which is remarkable in salt reducing effect and beneficial to plant growth is screened out. The method has the advantages of simplicity and convenience in operation, low cost, reliable data and the like, and provides a scientific basis and a practical scheme for saline-alkali soil improvement.

Description

Technical Field

[0001] The present invention belongs to the technical field of agricultural soil improvement, and particularly relates to a method and system for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil. Background Art

[0002] The treatment of saline-alkali land is an important topic for improving land productivity. Existing technologies mostly use chemical improvers or water conservancy projects, but they are costly and prone to secondary pollution. Although returning biomass to the field can increase soil organic matter, the salt reduction effects of different media vary greatly, and there is a lack of systematic evaluation methods. Traditional conductivity detection is mostly used in laboratory environments and is difficult to directly guide field practice. Therefore, there is an urgent need for a simple and low-cost field experiment method to quickly screen medium formulations suitable for different saline-alkali land conditions. Summary of the Invention

[0003] To solve the above technical problems, the present invention proposes a method and system for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil to solve the problems existing in the above prior art.

[0004] In a first aspect, to achieve the above object, the present invention provides a method for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil, including the following steps:

[0005] Excavate a number of square pits on a saline-alkali land plot with a salt content ≥ 2%;

[0006] Mix the medium and saline-alkali soil according to a preset volume ratio and fill them into the square pits;

[0007] Inject pure water into the mixed soil until it reaches a saturated state, and detect the conductivity of the topsoil every day until the data stabilizes;

[0008] Calculate the salt reduction effect based on the conductivity, and simultaneously conduct a seedling emergence rate experiment and a biomass experiment to screen out the optimal medium combination.

[0009] Optionally, the medium includes mushroom residue, crushed switchgrass straw residue, cotton stalk residue, fly ash slag, and fine fly ash.

[0010] Optionally, the process of the seedling emergence rate experiment includes: sowing switchgrass seeds at different depths in the mixed soil, watering regularly and counting the seedling emergence rate; simultaneously setting a constant temperature petri dish and a normal soil control group, and calculating the relative germination rate.

[0011] Optionally, the process of the biomass experiment includes: screening out the formulations with a seedling emergence rate ≥ 75%, and retaining the corresponding experimental pits; after natural growth in summer and autumn, detecting the above-ground and underground biomass.

[0012] Optionally, the volume ratio of the medium to the saline-alkali soil is mushroom residue: plant residue / fly ash slag: saline-alkali soil = 1:1:1.

[0013] Optionally, the conductivity is detected at 8:00 am every day, and the number of consecutive detections is ≥ 15 times.

[0014] In a second aspect, the present invention also provides a system for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil, which is used to implement a method for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil. The system includes:

[0015] A square pit excavation module, configured to excavate a plurality of square pits on a saline-alkali land plot with a salt content ≥ 2%;

[0016] A medium mixing and filling module, configured to mix the medium and saline-alkali soil according to a preset volume ratio and then fill the mixture into the square pits;

[0017] A conductivity detection module, configured to inject pure water into the mixed soil until it reaches a saturated state, and detect the conductivity of the topsoil every day until the data is stable;

[0018] An experimental analysis module, configured to calculate the salt reduction effect based on the conductivity, and simultaneously perform a seedling emergence rate experiment and a biomass experiment to screen out the optimal medium combination.

[0019] Optionally, the medium mixing and filling module includes a medium ratio unit, and the types of media stored in the medium ratio unit include mushroom residue, switchgrass straw powder residue, cotton stalk residue, fly ash residue, and fly ash fine ash.

[0020] In a third aspect, the present invention also provides a computer terminal device, including:

[0021] One or more processors;

[0022] A memory, coupled to the processor, for storing one or more programs;

[0023] When the one or more programs are executed by the one or more processors, the one or more processors implement a method for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil.

[0024] In a fourth aspect, the present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it implements a method for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil.

[0025] Compared with the prior art, the present invention has the following advantages and technical effects:

[0026] A method and system for testing the salt reduction effect formed by mixing different media with heavy saline-alkali soil are provided by the present invention. By mixing media such as mushroom residue, crushed switchgrass straw residue, cotton stalk residue, fly ash residue, and fine fly ash with saline-alkali soil in a specific volume ratio, and combining conductivity detection and biological experiments, a medium formula with high salt reduction efficiency can be quickly screened out. It includes: excavating square pits in saline-alkali plots with a salt content of more than 2%, filling the mixture of the medium and saline-alkali soil in different volume ratios, and detecting the conductivity of the topsoil daily after water saturation until it stabilizes; simultaneously conducting emergence rate and biomass experiments to screen out the medium combination with significant salt reduction effect and beneficial to plant growth. The present invention has the advantages of simple operation, low cost, reliable data, etc., and provides a scientific basis and practical solution for saline-alkali land improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0028] Figure 1 It is a flowchart of the method of the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0030] It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0031] Embodiment 1

[0032] As Figure 1 shown, a method for testing the salt reduction effect formed by mixing different media with heavy saline-alkali soil is provided in this embodiment, including:

[0033] Excavating a number of square pits on saline-alkali plots with a salt content ≥ 2%;

[0034] Mixing the medium and saline-alkali soil in a preset volume ratio and filling it into the square pits;

[0035] Injecting pure water into the mixed soil until it reaches a saturated state, and detecting the conductivity of the topsoil daily until the data stabilizes;

[0036] Calculating the salt reduction effect according to the conductivity, and simultaneously conducting emergence rate experiments and biomass experiments to screen out the optimal medium combination.

[0037] Specifically, the process includes:

[0038] (1) Excavate multiple square pits on saline-alkali land plots with a salt content of ≥2%, with dimensions of 50 cm × 50 cm × 15 cm and a spacing of 40 cm between the square pits;

[0039] (2) Mix the medium and saline-alkali soil by volume and fill them into the square pits. Among them, the first five groups are mixtures with a volume ratio of construction waste to soil of 2:1, and the last four groups are mixtures of mushroom residue and different plant residues or fly ash residues with a volume ratio of 1:1:1;

[0040] (3) Inject pure water into each mixed soil until it is saturated, and detect the electrical conductivity of the topsoil daily until the deviation of two consecutive detections is ≤2%;

[0041] (4) Calculate the salt reduction effect based on the correlation between electrical conductivity and salt content, and simultaneously conduct emergence rate and biomass experiments to screen for highly efficient salt reduction formulas.

[0042] As an implementation method in this embodiment, the medium includes mushroom residue, crushed switchgrass straw residue, cotton stalk residue, fly ash residue, and fine fly ash.

[0043] As an implementation method in this embodiment, the process of the emergence rate experiment includes: sowing switchgrass seeds at different depths in the mixed soil, watering regularly, and counting the emergence rate; simultaneously setting up a constant temperature petri dish and a normal soil control group, and calculating the relative germination rate.

[0044] Specifically, the process includes:

[0045] The emergence rate experiment includes:

[0046] (a) Sow switchgrass seeds at different depths in the mixed soil, water regularly, and count the emergence rate;

[0047] (b) Simultaneously set up a constant temperature petri dish and a normal soil control group, and calculate the relative germination rate.

[0048] As an implementation method in this embodiment, the process of the biomass experiment includes: screening formulas with an emergence rate ≥75%, and retaining the corresponding experimental pits; after natural growth in summer and autumn, detecting the biomass of the above-ground and underground parts.

[0049] Specifically, the process includes:

[0050] The biomass experiment includes:

[0051] (a) Screen formulas with an emergence rate ≥75%, and retain the corresponding experimental pits;

[0052] (b) After natural growth in summer and autumn, detect the biomass of the above-ground and underground parts.

[0053] As an implementation method in this embodiment, the volume ratio of the medium to saline-alkali soil is: mushroom residue: plant residue / fly ash residue: saline-alkali soil = 1:1:1.

[0054] Specifically, the process includes: the volume ratio of the muck mixture is mushroom residue: plant residue / fly ash residue: saline-alkali soil = 1:1:1.

[0055] The seeding methods include surface broadcasting and seeding at a depth of 2 - 3 cm. The biomass detection needs to be carried out under the guidance of professionals, and the above-ground and underground parts should be distinguished. The layout of the square pits is 6 in each row and 4 rows in total, and there are 9 groups in the experimental group. The water injection volume is based on the saturation of the muck, and the water injection volume of each group is the same.

[0056] As an implementation method in this embodiment, the detection method of the conductivity is at 8:00 am every day, and the continuous detection times are ≥15 times.

[0057] Experimental design:

[0058] Dig square pits (50 cm × 50 cm × 15 cm) in the saline-alkali land plot and fill the mixture of the medium and saline-alkali soil according to different volume ratios.

[0059] The first five groups adopt the mixing method with a muck volume ratio of 2:1, and the last four groups adopt the 1:1:1 mixture of mushroom residue and plant residue / fly ash residue.

[0060] Detection method:

[0061] After injecting water until saturation, detect the conductivity of the topsoil every day until the data is stable.

[0062] Among them: The conductivity is linearly positively correlated with the salt content, and the formula is:

[0063] TDS (mg / L) = K × EC (μS / cm) TDS (mg / L) = k × EC (μS / cm) TDS: Total dissolved solids, approximately representing the salt content;

[0064] EC: Conductivity (usually expressed as the standard value at 25°C);

[0065] k: Conversion coefficient, the value range is usually 0.55 - 0.75, specifically depending on the salt composition:

[0066] Sodium chloride (NaCl) solution: k ≈ 0.64 k ≈ 0.64;

[0067] Mixed salt solution (such as natural water body): k ≈ 0.55 - 0.70 k ≈ 0.55 - 0.70.

[0068] Simultaneously conduct the germination rate experiment, screen out the formula with a germination rate ≥ 75%, and carry out the biomass detection.

[0069] Details of the steps disclosed above are as follows:

[0070] 1. Square pit layout:

[0071] Excavate 24 square pits (6 in each row, 4 rows in total), with a spacing of 40 cm.

[0072] For the first five groups, fill each row with a mixture of soil and waste residue in a volume ratio of 2:1. For the last four groups, fill with a 1:1:1 mixture of mushroom residue and other media.

[0073] 2. Conductivity detection:

[0074] Use a portable conductivity meter to detect the topsoil at 8 am every day and record until the data stabilizes.

[0075] 3. Seedling emergence rate experiment:

[0076] Each row of square pits is divided into two groups, A (deep sowing) and B (surface sowing). Sow 100 switchgrass seeds in each group, and simultaneously set up a control group in a constant temperature culture dish.

[0077] 4. Biomass detection:

[0078] Retain the formula with a seedling emergence rate ≥ 75%, and detect the above-ground and underground biomass after natural growth.

[0079] The above scheme is through field direct experiments, and the data is more in line with the actual application scenario. Combining conductivity and biological experiments, comprehensively evaluate the salt reduction effect and ecological adaptability of the medium. The operation is simple and the cost is low, suitable for large-scale promotion.

[0080] Implementation cases include:

[0081] Implementation case 1: Mixture of mushroom residue and switchgrass residue

[0082] Mixing ratio: 1:1:1 (mushroom residue: switchgrass residue: saline-alkali soil).

[0083] Result: After 15 days, the conductivity decreased by 40%, the seedling emergence rate was 82%, and the biomass increased by 35% compared with the control group.

[0084] Implementation case 2: Mixture of mushroom residue and cotton stalk residue

[0085] Mixing ratio: 1:1:1.

[0086] Result: The conductivity decreased by 38%, the seedling emergence rate was 78%, and the biomass increased by 30%.

[0087] Implementation case 3: Mixture of mushroom residue and fine fly ash

[0088] Mixing ratio: 1:1:1.

[0089] Results: The conductivity decreased by 45%, the emergence rate was 75%, and the biomass increased by 25%.

[0090] The comparative examples include:

[0091] Comparative Example 1: Pure saline-alkali soil

[0092] Results: The conductivity did not decrease, and the emergence rate was only 15%.

[0093] Comparative Example 2: Separate mushroom residue (volume ratio 2:1)

[0094] Results: The conductivity decreased by 20%, and the emergence rate was 50%.

[0095] Comparative Example 3: Traditional gypsum improvement method

[0096] Results: The conductivity decreased by 30%, but the cost was high and the emergence rate was only 60%.

[0097] Comparative Example 4: Separate fly ash residue (volume ratio 2:1)

[0098] Results: The conductivity decreased by 25%, and the emergence rate was 45%.

[0099] Comparative Example 5: No-medium control group

[0100] Results: The conductivity did not change, and the emergence rate was 10%.

[0101] Conclusion:

[0102] By mixing the specific medium combination with the saline-alkali soil, the present invention significantly reduces the soil salt content and improves the plant growth index, having significant economic and ecological benefits.

[0103] Based on this, a method for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil provided by an embodiment of the present invention, by mixing media such as mushroom residue, crushed switchgrass straw residue, cotton stalk residue, fly ash residue and fly ash fine ash with the saline-alkali soil according to a specific volume ratio, combining conductivity detection and biological experiments, quickly screening out a medium formula with high salt reduction efficiency. It includes: digging a square pit in a saline-alkali land plot with a salt content of more than 2%, filling a mixture of the medium and the saline-alkali soil according to different volume ratios, saturating with water and detecting the conductivity of the top soil every day until it is stable; synchronously conducting emergence rate and biomass experiments to screen out a medium combination with significant salt reduction effect and beneficial to plant growth. The present invention has the advantages of simple operation, low cost, reliable data, etc., providing a scientific basis and practical solution for saline-alkali land improvement.

[0104] Example Two

[0105] In this embodiment, a computer terminal device is provided, including:

[0106] One or more processors;

[0107] A memory, coupled to the processor, for storing one or more programs;

[0108] When the one or more programs are executed by the one or more processors, the one or more processors implement the methods in the above embodiments.

[0109] In this embodiment, a computer-readable storage medium is further provided, on which a computer program is stored. When the computer program is executed by a processor, the methods in the above embodiments are implemented.

[0110] In this embodiment, an electronic device is further provided, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the methods in the above embodiments.

[0111] The above program can run in a processor or can also be stored in a memory (or referred to as a computer-readable medium). The computer-readable medium includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory, or other memory technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD), or other optical storage, magnetic cassette tapes, magnetic disk storage, or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device.

[0112] These computer programs can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate computer-implemented processing. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 The steps corresponding to different steps can be implemented by different modules.

[0113] In this embodiment, such a device or system is provided. The system is called a system for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil, and includes:

[0114] A square pit excavation module, configured to excavate a plurality of square pits on a saline-alkali land plot with a salt content ≥ 2%;

[0115] A medium mixing and filling module for mixing a medium with saline-alkali soil according to a preset volume ratio and then filling the square pit therewith;

[0116] A conductivity detection module for injecting pure water into the mixed soil until it is saturated and detecting the conductivity of the topsoil daily until the data is stable;

[0117] An experimental analysis module for calculating the salt reduction effect based on the conductivity, and simultaneously performing a seedling emergence rate experiment and a biomass experiment to screen out the optimal medium combination.

[0118] As an implementation manner in this embodiment, the medium mixing and filling module includes a medium proportioning unit, and the medium types stored in the medium proportioning unit include mushroom residue, crushed switchgrass straw residue, cotton stalk residue, fly ash residue and fine fly ash.

[0119] As an implementation manner in this embodiment, the experimental analysis module includes a seedling emergence rate experiment unit, which is used for sowing switchgrass seeds at different depths in the mixed soil, watering regularly and counting the seedling emergence rate, and calculating the relative germination rate through a constant temperature culture dish and a normal soil control group.

[0120] As an implementation manner in this embodiment, the experimental analysis module includes a biomass experiment unit, which is used for screening the formulations with a seedling emergence rate ≥ 75%, retaining the corresponding experimental pits, and detecting the above-ground and underground biomass after two seasons of natural growth in summer and autumn.

[0121] As an implementation manner in this embodiment, the medium mixing and filling module includes a volume ratio control unit, which is used for setting the mixing ratio of mushroom residue, plant residue / fly ash residue to saline-alkali soil as 1:1:1.

[0122] As an implementation manner in this embodiment, the conductivity detection module includes a timing detection unit, which is used for starting the detection at 8:00 am every day and the continuous detection times ≥ 15 times.

[0123] This system or device is used to implement the functions of the method in the above embodiment. Each module in this system or device corresponds to each step in the method, and those that have been described in the method will not be repeated here.

[0124] Through the above implementation manner, the problem of testing the salt reduction effect formed by mixing different media with severely saline-alkali soil in the related technology is solved, so as to ensure that the problems in the existing technology are solved.

[0125] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A method and system for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil, characterized in that, It includes the following steps: Excavate a number of square pits on saline-alkali land with a salt content of ≥2%; Mix the medium and saline-alkali soil according to a preset volume ratio and fill it into the square pits; Inject pure water into the mixed soil until it reaches a saturated state, and detect the electrical conductivity of the topsoil every day until the data is stable; Calculate the salt reduction effect based on the electrical conductivity, and simultaneously conduct a germination rate experiment and a biomass experiment to screen out the optimal medium combination.

2. The method according to claim 1, wherein The medium includes mushroom residue, crushed switchgrass straw residue, cotton stalk residue, fly ash residue and fine fly ash.

3. The method according to claim 1, characterized in that The process of the germination rate experiment includes: sowing switchgrass seeds at different depths in the mixed soil, watering regularly and counting the germination rate; simultaneously setting a constant temperature petri dish and a normal soil control group to calculate the relative germination rate.

4. The method according to claim 1, wherein The process of the biomass experiment includes: screening out the formula with a germination rate of ≥75% and retaining the corresponding experimental pits; after natural growth in summer and autumn, detecting the above-ground and underground biomass.

5. The method according to claim 1, characterized in that, The volume ratio of the medium to the saline-alkali soil is mushroom residue: plant residue / fly ash residue: saline-alkali soil = 1:1:

1.

6. The method according to claim 1, wherein The detection method of the electrical conductivity is at 8 am every day, and the continuous detection times are ≥15 times.

7. A system for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil, characterized in that, The system includes: A square pit excavation module for excavating a number of square pits on saline-alkali land with a salt content of ≥2%; A medium mixing and filling module for mixing the medium and saline-alkali soil according to a preset volume ratio and filling it into the square pits; An electrical conductivity detection module for injecting pure water into the mixed soil until it reaches a saturated state and detecting the electrical conductivity of the topsoil every day until the data is stable; An experimental analysis module for calculating the salt reduction effect based on the electrical conductivity and simultaneously performing a germination rate experiment and a biomass experiment to screen out the optimal medium combination.

8. The system according to claim 7, wherein The medium mixing and filling module includes a medium ratio unit, and the types of media stored in the medium ratio unit include mushroom residue, crushed switchgrass straw residue, cotton stalk residue, fly ash residue and fine fly ash.

9. A computer terminal device, characterized in that, It includes: One or more processors; A memory coupled to the processor for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil as described in any one of claims 1-6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the method for testing the salt reduction effect formed by mixing different media with severely saline-alkali soil as described in any one of claims 1-6.

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