CN112106474A - Method for treating saline-alkali soil by combining engineering and chemical improvement on coastal saline-alkali soil - Google Patents
Method for treating saline-alkali soil by combining engineering and chemical improvement on coastal saline-alkali soil Download PDFInfo
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- 239000002689 soil Substances 0.000 title claims abstract description 101
- 239000003513 alkali Substances 0.000 title claims abstract description 62
- 230000006872 improvement Effects 0.000 title claims abstract description 24
- 239000000126 substance Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000003516 soil conditioner Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 110
- 150000003839 salts Chemical class 0.000 claims description 25
- 238000003971 tillage Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 13
- 238000007689 inspection Methods 0.000 claims description 10
- 239000004576 sand Substances 0.000 claims description 10
- 241000196324 Embryophyta Species 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 5
- 238000001764 infiltration Methods 0.000 claims description 5
- 230000008595 infiltration Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 5
- 239000003415 peat Substances 0.000 claims description 5
- 230000036541 health Effects 0.000 claims description 2
- 235000007164 Oryza sativa Nutrition 0.000 abstract description 5
- 235000009566 rice Nutrition 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 240000007594 Oryza sativa Species 0.000 abstract 1
- 230000000813 microbial effect Effects 0.000 description 7
- 230000001603 reducing effect Effects 0.000 description 5
- 241000209094 Oryza Species 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000012010 growth Effects 0.000 description 3
- 239000003550 marker Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 244000063299 Bacillus subtilis Species 0.000 description 1
- 235000014469 Bacillus subtilis Nutrition 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241000186685 Lactobacillus hilgardii Species 0.000 description 1
- 241000881860 Paenibacillus mucilaginosus Species 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009328 dry farming Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
- 238000004181 pedogenesis Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- -1 salt ions Chemical class 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000002688 soil aggregate Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 230000031068 symbiosis, encompassing mutualism through parasitism Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
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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
-
- 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
- A01B77/00—Machines for lifting and treating soil
-
- 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Soil Working Implements (AREA)
Abstract
The invention discloses a method for treating saline-alkali soil in coastal saline-alkali soil by combining engineering and chemical improvement, belonging to the technical field of saline-alkali soil improvement. The method for treating the saline-alkali soil by combining engineering and chemical improvement on the coastal saline-alkali soil comprises the following steps: (1) pre-treating the hidden pipe, paving the hidden pipe, (2) applying a soil conditioner, (3) planting crops and the like. By adopting the method for treating the saline-alkali soil by combining engineering and chemical improvement, when the rice is planted in the coastal saline-alkali soil, on one hand, the saline-alkali soil is obviously reduced by engineering measures, and on the other hand, the physical and chemical properties of the soil can be adjusted by matching and building the soil conditioner, so that the overall improvement effect of the soil is further achieved.
Description
Technical Field
The invention belongs to the technical field of saline-alkali soil improvement, and particularly relates to a method for treating saline-alkali soil by combining engineering and chemical improvement on coastal saline-alkali soil.
Background
The salinization of soil is an outstanding ecological environment problem in dry farming agricultural areas in the world, and the salinized soil in China has large area, wide distribution and various types. The total saline-alkali area of modern saline-alkali soil, residual saline-alkali soil and potential saline-alkali soil is 9913.3 hectares, and the total area is about equal to the cultivated land area in China. With the continuous reduction of the cultivated land area, the saline-alkali land as an important land resource in China has the potential of carrying out reasonable and scientific improvement by applying the current new products and new technologies, and further develops a new direction for the agricultural development in China.
The saline-alkali soil is mainly formed by redistributing various easily soluble salts along with water in the horizontal direction and the vertical direction of the ground so as to gradually accumulate salt on the surface layer of the soil in special environment. The main factors influencing the formation of saline-alkali soil are as follows: climate conditions, geographical conditions, soil texture and ground water, the effects of rivers and sea water, and improper farming management, etc. It is generally believed that the root cause of saline alkali soil formation is poor moisture status. Therefore, the water regulation and control on the saline-alkali soil is a key measure. In the improvement of saline-alkali soil, the intervention of water conservancy engineering measures on water regulation is the greatest according to the rule that salt comes with water and salt goes with water.
In addition, saline-alkali soil has poor soil moisture condition and accumulated salt, so that soil properties are changed, and the soil structure is deteriorated. The salt content increases due to the increase of salt segregants in the soil, and the proportion of exchangeable sodium to the total salt ions also increases. When the content of sodium ions is too high, normal soil aggregates can be damaged, so that soil particles are dispersed, and the phenomena of muddy soil when wet and hardened when dry occur. Therefore, when saline-alkali soil improvement is carried out, improvement of physical properties of soil is considered, the aggregate structure of the soil is strengthened, the porosity of the soil is increased, and a good root system growth environment is created.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a method for treating saline-alkali soil by combining engineering and chemical improvement on coastal saline-alkali soil, which not only can play a role in reducing the salt content of the saline-alkali soil, but also can improve the physicochemical property of the saline-alkali soil, and improve and treat the saline-alkali soil integrally.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for treating saline-alkali soil by combining engineering and chemical improvement on coastal saline-alkali soil comprises the following steps:
(1) hidden pipe laying pretreatment
Removing weeds and riprap on the original landform, and ensuring that the land has a foundation for farmland planting; leveling the land to ensure that engineering instruments can enter the field for operation;
(2) lay concealed conduit
Sand filtering material: selecting a proper sand filter material according to the soil texture, and performing landfill;
laying a suction pipe: adopting a single-wall corrugated infiltration pipe of DN110mm with the spacing of 20 m;
laying a water collecting pipe: laying a water collecting pipe at a depth of at least 20cm lower than the water suction pipe for collecting water flow of the water suction pipe;
setting a water collecting well and an inspection well: an inspection well is arranged at the joint of the water suction pipe and the water collecting pipeline and is used for collecting water flow of the water collecting pipeline, inspecting the working condition of the pipeline and performing later maintenance;
building an integrated drainage pump station: an automatically controlled forced-exhaust pump station is built, the water pump is linked with the liquid level meter by using the controller, and when the water level in the pump chamber is higher than that of the air pump, the water pump automatically operates; when the water level in the pump is lower than the minimum submerging depth of the water pump, the water pump automatically stops running, and therefore the functions of draining water and salt in the whole project area are achieved; the height of the tail end of the water collecting pipeline is-1.6 m relative to the ground;
(3) application of soil conditioner
After the concealed conduit is laid, carrying out rotary tillage on the land to ensure that the land is loose and meets the tillage requirement, and meanwhile, applying a soil conditioner along with the rotary tillage to fully mix the soil conditioner with the soil; then leveling the land;
(4) crop planting
And planting crops after the engineering and soil conditioner are applied.
On the basis of the scheme, the soil conditioner in the step (3) is one of a Zhongnong green health soil conditioner, a Zhongdao ocean soil conditioner and peat; preferably, the soil conditioner in the step (3) is a Zhongnong Lukang soil conditioner, and the application amount of the Zhongnong Lukang soil conditioner is 10 kg/mu.
The technical scheme of the invention has the advantages that:
the method for treating the saline-alkali soil by combining engineering and chemical improvement is adopted, and when the rice is planted on the coastal saline-alkali soil, on one hand, the saline-alkali soil is obviously reduced by engineering measures, and on the other hand, the physical and chemical properties of the soil can be adjusted by matching the soil conditioner, so that the overall improvement effect of the soil is further achieved.
Salt removing technology by using a concealed pipe: the technology is a method for improving saline-alkali soil by utilizing an engineering water conservancy method. Simply speaking, the method is a technology of burying a pipeline with small holes at the depth of 1-3 meters below the ground surface, and dissolving and draining the salt on the surface layer of the soil by combining irrigation and leaching. Simultaneously, the rising of steerable ground water level is laid to the hidden pipe, prevents the secondary salinization of soil.
Microbial soil conditioner: certain microbial strains extracted or cultured in specific environments can produce a large amount of acidic substances, and then neutralize excessive alkaline substances in saline-alkali soil. In addition, a delicate mutualistic symbiosis relationship exists between the microorganisms and the plants, so that the growth of the plants can be assisted, and the growth environment of the root systems of the plants can be improved. In addition, the existence of the microorganism can decompose the refractory minerals in the soil, and provide an environment which can be absorbed by nutrient elements for the growth of plants.
In the treatment of saline-alkali soil, water regulation is the most important technical point. The salt content of the saline-alkali soil can be rapidly reduced through the regulation and control of the water content, and an important foundation is laid for the planting of the saline-alkali soil. On the other hand, the regulation of pure water can only carry out the positional migration of chemical components in the soil, and cannot further improve the basic properties of the soil, including porosity, microbial community, colloid characteristics and the like, so that the soil conditioner needs to be applied to make up for the short plates of hydraulic engineering measures. In recent years, with the rapid development of the microbial industry, the microbial soil conditioner reaches a certain share in the current soil conditioner market. The microorganisms are an important component under the environment of healthy soil, are used as active components of the soil, and are beneficial to improving the saline-alkali problem of saline-alkali soil through the exchange of oxygen and carbon dioxide of metabolic activities and secreted organic acid and the like in the living process of the microorganisms in the soil for better survival in the soil. The microbial soil conditioner can improve the problem of overhigh saline-alkali index on saline-alkali soil to a certain extent.
Detailed Description
Terms used in the present invention have generally meanings as commonly understood by one of ordinary skill in the art, unless otherwise specified.
The present invention will be described in further detail with reference to the following data in conjunction with specific examples. The following examples are intended to illustrate the invention and are not intended to limit the scope of the invention in any way.
Example 1
A method for treating saline-alkali soil by combining engineering and chemical improvement on coastal saline-alkali soil comprises the following steps:
(1) hidden pipe laying pretreatment
Removing weeds and riprap on the original landform, and ensuring that the land has a foundation for farmland planting; leveling the land to ensure that engineering instruments can enter the field for operation;
(2) lay concealed conduit
Before laying the hidden pipes, retesting the elevation points to ensure that the numerical values are correct, laying lines according to the preset hidden pipes, and inserting the marker posts at the beginning and the tail ends. And carrying out laser measurement according to the designed and calculated gradient to ensure the buried gradient of the concealed pipe, excavating the concealed pipe buried ditch by using an excavator, burying according to the selected concealed pipe filter material, and then laying the concealed pipe. And after the paving is finished, backfilling, and ridging to prevent the water content from being too high and sinking into a ditch. Meanwhile, the laying starting end of the concealed pipe and the pavement need to be backfilled and compacted.
Sand filtering material: selecting a proper sand filter material according to the soil texture, and performing landfill;
laying a suction pipe: adopting a single-wall corrugated infiltration pipe of DN110mm with the spacing of 20 m;
laying a water collecting pipe: laying a water collecting pipe at a depth of at least 20cm lower than the water suction pipe for collecting water flow of the water suction pipe;
setting a water collecting well and an inspection well: an inspection well is arranged at the joint of the water suction pipe and the water collecting pipeline and is used for collecting water flow of the water collecting pipeline, inspecting the working condition of the pipeline and performing later maintenance;
building an integrated drainage pump station: an automatically controlled forced-exhaust pump station is built, the water pump is linked with the liquid level meter by using the controller, and when the water level in the pump chamber is higher than that of the air pump, the water pump automatically operates; when the water level in the pump is lower than the minimum submerging depth of the water pump, the water pump automatically stops running, and therefore the functions of draining water and salt in the whole project area are achieved; the height of the tail end of the water collecting pipeline is-1.6 m relative to the ground;
(3) application of soil conditioner
After the concealed conduit is laid, carrying out rotary tillage on the land to ensure that the land is loose and meets the tillage requirement, and meanwhile, applying a soil conditioner along with the rotary tillage to fully mix the soil conditioner with the soil; then, bulldozing and leveling by using a tractor and other instruments;
the soil conditioner is a Zhongnong green soil conditioner, and the main functional substances of the product are bacillus subtilis, paenibacillus mucilaginosus and the like; the application scheme is 10 kg/mu; carrying out rotary tillage and broadcast application along with tillage;
(4) crop planting
After the engineering and soil conditioner are applied, the rice is planted.
Before the beginning of engineering and experiments, original soil samples of a base are collected, the physicochemical properties of the soil at different levels are analyzed, and the data are as follows:
TABLE 1 different soil pH and salt content
As can be seen from the above table, the pH value of the topsoil of 1-20cm which is not cultivated reaches 8.80, and the pH value of the topsoil of 20-40cm is 8.20; the salt content is over 5 per mill, and the saline-alkali degree of the soil is serious.
After the concealed conduit is laid and implemented, the salt content of water samples at different water sources is detected, the salt content of the water samples at the water inlet ditch is 0.408 per mill, and after the water is drained by the concealed conduit, the water is drained by a drainage outlet and sampled, and the salt content of the water samples is 6.255 per mill. The data show that the salt washing effect of the dark tube is very obvious.
Example 2
A method for treating saline-alkali soil by combining engineering and chemical improvement on coastal saline-alkali soil comprises the following steps:
(1) hidden pipe laying pretreatment
Removing weeds and riprap on the original landform, and ensuring that the land has a foundation for farmland planting; leveling the land to ensure that engineering instruments can enter the field for operation;
(2) lay concealed conduit
Before laying the hidden pipes, retesting the elevation points to ensure that the numerical values are correct, laying lines according to the preset hidden pipes, and inserting the marker posts at the beginning and the tail ends. And carrying out laser measurement according to the designed and calculated gradient to ensure the buried gradient of the concealed pipe, excavating the concealed pipe buried ditch by using an excavator, burying according to the selected concealed pipe filter material, and then laying the concealed pipe. And after the paving is finished, backfilling, and ridging to prevent the water content from being too high and sinking into a ditch. Meanwhile, the laying starting end of the concealed pipe and the pavement need to be backfilled and compacted.
Sand filtering material: selecting a proper sand filter material according to the soil texture, and performing landfill;
laying a suction pipe: adopting a single-wall corrugated infiltration pipe of DN110mm with the spacing of 20 m;
laying a water collecting pipe: laying a water collecting pipe at a depth of at least 20cm lower than the water suction pipe for collecting water flow of the water suction pipe;
setting a water collecting well and an inspection well: an inspection well is arranged at the joint of the water suction pipe and the water collecting pipeline and is used for collecting water flow of the water collecting pipeline, inspecting the working condition of the pipeline and performing later maintenance;
building an integrated drainage pump station: an automatically controlled forced-exhaust pump station is built, the water pump is linked with the liquid level meter by using the controller, and when the water level in the pump chamber is higher than that of the air pump, the water pump automatically operates; when the water level in the pump is lower than the minimum submerging depth of the water pump, the water pump automatically stops running, and therefore the functions of draining water and salt in the whole project area are achieved; the height of the tail end of the water collecting pipeline is-1.6 m relative to the ground;
(3) application of soil conditioner
After the concealed conduit is laid, carrying out rotary tillage on the land to ensure that the land is loose and meets the tillage requirement, and meanwhile, applying a soil conditioner along with the rotary tillage to fully mix the soil conditioner with the soil; then, bulldozing and leveling by using a tractor and other instruments;
the soil conditioner is a Zhongdao ocean soil conditioner, and the main functional substances of the product are lactobacillus hilgardii and the like; the application scheme is 80 kg/mu; carrying out rotary tillage and broadcast application along with tillage;
(4) crop planting
After the engineering and soil conditioner are applied, the rice is planted.
Example 3
A method for treating saline-alkali soil by combining engineering and chemical improvement on coastal saline-alkali soil comprises the following steps:
(1) hidden pipe laying pretreatment
Removing weeds and riprap on the original landform, and ensuring that the land has a foundation for farmland planting; leveling the land to ensure that engineering instruments can enter the field for operation;
(2) lay concealed conduit
Before laying the hidden pipes, retesting the elevation points to ensure that the numerical values are correct, laying lines according to the preset hidden pipes, and inserting the marker posts at the beginning and the tail ends. And carrying out laser measurement according to the designed and calculated gradient to ensure the buried gradient of the concealed pipe, excavating the concealed pipe buried ditch by using an excavator, burying according to the selected concealed pipe filter material, and then laying the concealed pipe. And after the paving is finished, backfilling, and ridging to prevent the water content from being too high and sinking into a ditch. Meanwhile, the laying starting end of the concealed pipe and the pavement need to be backfilled and compacted.
Sand filtering material: selecting a proper sand filter material according to the soil texture, and performing landfill;
laying a suction pipe: adopting a single-wall corrugated infiltration pipe of DN110mm with the spacing of 20 m;
laying a water collecting pipe: laying a water collecting pipe at a depth of at least 20cm lower than the water suction pipe for collecting water flow of the water suction pipe;
setting a water collecting well and an inspection well: an inspection well is arranged at the joint of the water suction pipe and the water collecting pipeline and is used for collecting water flow of the water collecting pipeline, inspecting the working condition of the pipeline and performing later maintenance;
building an integrated drainage pump station: an automatically controlled forced-exhaust pump station is built, the water pump is linked with the liquid level meter by using the controller, and when the water level in the pump chamber is higher than that of the air pump, the water pump automatically operates; when the water level in the pump is lower than the minimum submerging depth of the water pump, the water pump automatically stops running, and therefore the functions of draining water and salt in the whole project area are achieved; the height of the tail end of the water collecting pipeline is-1.6 m relative to the ground;
(3) application of soil conditioner
After the concealed conduit is laid, carrying out rotary tillage on the land to ensure that the land is loose and meets the tillage requirement, and meanwhile, applying a soil conditioner along with the rotary tillage to fully mix the soil conditioner with the soil; then, bulldozing and leveling by using a tractor and other instruments;
the soil conditioner is peat soil, and the main functional substance of the product is natural peat; the application scheme is 2-3 t/mu; carrying out rotary tillage and broadcast application along with tillage;
(4) crop planting
After the engineering and soil conditioner are applied, the rice is planted.
Through the engineering and experimental arrangement of the embodiment 1-3, after 1-season crop planting, soil samples are collected again for detection, and the soil saline-alkali indexes are as follows:
TABLE 2 index of salinity and alkalinity of soil after comprehensive improvement
As can be seen from the data in Table 2, the salt content of the soil is reduced to about 0.2 per mill after the crops are planted in 1 season, and the salt reducing effect is obvious. After different soil conditioners are used, the pH value of the Zhongnong green soil conditioner and the Zhongdao ocean soil conditioner is reduced to some extent compared with that of surface soil which is not improved by 0-20cm, but the peat soil conditioner does not play a role in reducing alkali, and the pH value of the soil rises to some extent. The reasonable microbial soil conditioner can play a role in reducing alkali and can also play a role in assisting in reducing salt to a certain extent.
Although the present invention has been described with reference to a few embodiments, it should be understood that the present invention is not limited to the above embodiments, but rather, the present invention is not limited to the above embodiments, and those skilled in the art can make various changes and modifications without departing from the scope of the invention.
Claims (3)
1. A method for treating saline-alkali soil by combining engineering and chemical improvement on coastal saline-alkali soil is characterized by comprising the following steps:
(1) hidden pipe laying pretreatment
Removing weeds and riprap on the original landform, and ensuring that the land has a foundation for farmland planting; leveling the land to ensure that engineering instruments can enter the field for operation;
(2) lay concealed conduit
Sand filtering material: selecting a proper sand filter material according to the soil texture, and performing landfill;
laying a suction pipe: adopting a single-wall corrugated infiltration pipe of DN110mm with the spacing of 20 m;
laying a water collecting pipe: laying a water collecting pipe at a depth of at least 20cm lower than the water suction pipe for collecting water flow of the water suction pipe;
setting a water collecting well and an inspection well: an inspection well is arranged at the joint of the water suction pipe and the water collecting pipeline and is used for collecting water flow of the water collecting pipeline, inspecting the working condition of the pipeline and performing later maintenance;
building an integrated drainage pump station: an automatically controlled forced-exhaust pump station is built, the water pump is linked with the liquid level meter by using the controller, and when the water level in the pump chamber is higher than that of the air pump, the water pump automatically operates; when the water level in the pump is lower than the minimum submerging depth of the water pump, the water pump automatically stops running, and therefore the functions of draining water and salt in the whole project area are achieved; the height of the tail end of the water collecting pipeline is-1.6 m relative to the ground;
(3) application of soil conditioner
After the concealed conduit is laid, carrying out rotary tillage on the land to ensure that the land is loose and meets the tillage requirement, and meanwhile, applying a soil conditioner along with the rotary tillage to fully mix the soil conditioner with the soil; then leveling the land;
(4) crop planting
And planting crops after the engineering and soil conditioner are applied.
2. The method for treating saline-alkali soil in coastal saline-alkali soil by combining engineering and chemical improvement according to claim 1, wherein the soil conditioner in the step (3) is one of a Zhongnong green health soil conditioner, a Zhongdao ocean soil conditioner and peat.
3. The method for treating the saline-alkali soil in the coastal saline-alkali soil by combining engineering and chemical improvement according to claim 2, wherein the soil conditioner in the step (3) is a Zhongnong Lukang soil conditioner, and the application amount of the Zhongnong Lukang soil conditioner is 10 kg/mu.
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| RU2034900C1 (en) * | 1992-12-09 | 1995-05-10 | Всероссийский научно-исследовательский институт гидротехники и мелиорации им.А.Н.Костякова | Method for reclamation of saline medium-loamy soils |
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