AU2020102841A4 - A soil improvement methods for saline-alkaline land - Google Patents
A soil improvement methods for saline-alkaline land Download PDFInfo
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- AU2020102841A4 AU2020102841A4 AU2020102841A AU2020102841A AU2020102841A4 AU 2020102841 A4 AU2020102841 A4 AU 2020102841A4 AU 2020102841 A AU2020102841 A AU 2020102841A AU 2020102841 A AU2020102841 A AU 2020102841A AU 2020102841 A4 AU2020102841 A4 AU 2020102841A4
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- alkali
- well
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- 239000002689 soil Substances 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 25
- 150000003839 salts Chemical class 0.000 claims abstract description 66
- 239000003513 alkali Substances 0.000 claims abstract description 40
- 230000007717 exclusion Effects 0.000 claims abstract description 18
- 238000002386 leaching Methods 0.000 claims abstract description 16
- 239000004575 stone Substances 0.000 claims abstract description 9
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 239000003337 fertilizer Substances 0.000 claims description 12
- 239000010921 garden waste Substances 0.000 claims description 9
- 239000003895 organic fertilizer Substances 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 9
- 239000010902 straw Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 7
- 238000009412 basement excavation Methods 0.000 claims description 6
- 238000003971 tillage Methods 0.000 claims description 6
- 238000003973 irrigation Methods 0.000 claims description 4
- 230000002262 irrigation Effects 0.000 claims description 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 4
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical class [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 claims description 3
- 239000004746 geotextile Substances 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 235000014676 Phragmites communis Nutrition 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract 1
- 238000005527 soil sampling Methods 0.000 abstract 1
- 238000011161 development Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/005—Soil-conditioning by mixing with fibrous materials, filaments, open mesh or the like
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Environmental Sciences (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention provides a soil improvement method for saline-alkali soil, wherein it
includes the following steps. Pushing the surface soil with salt content less than 2%
longitudinally along the salt pond to the side of the boundary after testing the soil in and around
the saline-alkali soil; excavating the silt soil on the side of the saline-alkali soil, then pushing
them to the other side of the salt pond boundary, rolling and leveling the saline-alkali soil after
soil sampling, and then excavating the salt exclusion blind drain, backfilling the stone nitrite
and the blind pipe to constitute a leaching layer ; building the salt exclusion well; excavating
the silt soil on the side without the salt exclusion project, and then slotting the land to exclude
salt after rolling and leveling, backfilling the leaching layer; drying the salt pond silt excavated
twice and backfilling after mixing it in different places; After leaching, planting the salt-tolerant
plant reed to improve the saline-alkali soil.
Description
A soil improvement methods for saline-alkaline land
[01] The invention relates to the technical field of salt exclusion of saline-alkali soil, in particular to a soil improvement methods for saline-alkaline land.
[02] In recent years, coastal area has become an important position to develop "blue economy" in our country. It is of great significance to study the improved afforestation technology of coastal saline-alkali land for urban construction and development. In the afforestation project of saline-alkali land in coastal area, the improvement effect of saline-alkali land is directly related to whether the plant can survive and whether the soil can satisfy the need of plant growth for a long time, which is the decisive factor for the success or failure of the project. In the past, development and construction were carried out on the basis of afforestation, which undoubtedly increased the contradiction between the supply of land resources and the demand of social development. Rational utilization and effective development of salinized soil is an important subject of afforestation in coastal areas.
[03] In order to solve the above technical problems, the invention provides a soil improvement method for saline-alkali land, wherein it adopts the soil treatment method of saline-alkali land by leaching to discharge salt and determines the depth of soil improvement by vegetation root characteristics, it speeding up the soil improvement cycle, not only reducing the engineering cost, but also reducing the maintenance cost at the later stage.
[04] The invention provides a soil improvement method for saline-alkali land, which includes the following steps:
[05] (1) Pushing the surface soil with salt content less than 2% to the side of the boundary;
[06] (2) Rolling and leveling the saline-alkali soil after excavating the silt soil on the side of it, and then excavating the salt exclusion blind drain, backfilling the stone nitrite and the blind pipe to constitute a leaching layer; building the salt exclusion well, and laying and fixing the longitudinal geotextile;
[07] (3) Rolling and leveling the salt-alkali soil after excavating the silt soil on the side without the salt exclusion project, and then backfilling the leaching layer, backfilling the stone nitrite and the blind pipe to constitute leaching layer, and the excavation depth is greater than the excavation depth of the step (2);
[08] (4) Mixing the saline-alkali silt soil excavated twice in different places evenly and backfilling it to the design height.
[09] Further, the blind pipe of salt pond soil is buried at a depth of 1.3 meters with a spacing of 8 meters in step (2); the blind pipe of saline-alkali soil is buried at a depth of 1.5 meters with a spacing of 2-3 meters in step (6); the specification of the backfill stone is 1-3 cm, the specifications of the blind pipe is 30cm*30cm and the blind pipe is a double-walled corrugated pipe with a height of 30cm in step (2) and step (3);.
[010] Further, non-woven cloth was laid on the leaching layer and the specification of non-woven cloth is 60-100g/m 2 in the steps (2) and (3).
[011] Further, the salt pond silt is mixed with conditioner according to the salt content of the soil in the step (4);
[012] Specifically, the soil salt content is divided into three kinds, the soil salt content is less than 1.5%, the soil salt content is 1.5%-3%, the soil salt content is more than 3%;
[013] When the soil salt content is less than 1.5%, the conditioner includes straw or garden waste, mountain sand and organic fertilizer. The volume ratio of each component to the whole soil is 8-12%, 8-12%, 4-6%.
[014] When the soil salt content is 1.5%-3%. The conditioner includes straw or garden waste, mountain sand and organic fertilizer. The ratio of each component to the whole soil is 13-17%, 8-12%, 5-7%.
[015] When the soil salt content is more than 3%, the conditioner includes straw or garden waste, mountain sand, organic fertilizer body, the volume ratio of each component is 23-27%, 18-22%, 6-10%.
[016] Further, it also includes followings.
[017] (5) Applying improved fertilizer on the backfilled ground and mixing it by rotary tillage;
[018] (6) Casting out a number of narrow border for irrigation;
[019] (7) Planting reed.
[020] Further, the improved fertilizer mentioned-above is an acid improved fertilizer containing activated calcium ions, and the thickness of the improved fertilizer is 18-22% of the rotary tillage depth.
[021] Further, the length of the narrow border is 8-12 m, the width is 0.8~1.2 m, and the water-soil ratio is 1.2: 1-0.9: 1.
[022] Further, the salt drain well comprises concrete cushion, barrel-shaped plastic inner casing, well casing, and well cover, and the plastic inner casing above is mounted at the top center of the concrete cushion. The concrete cushion above is constructed of blocks and mortar to form a well body enclosing the plastic inner casing. The well casing above is fixed to the top of the well body by bolts, and the well cover above is arranged on the well casing. The bottom of the plastic inner casing is provided with a drainage pipe interface, one blind pipe interface at least and the horizontal height of the blind pipe interface is higher than that of the drain pipe interface. The other end of the drainage pipe is connected with the municipal rainwater system or the municipal sewage system.
[023] Further, the bottom of the plastic inner tank mentioned-above is hemispherical shell-shaped.
[024] Compared with the prior art, the invention has the following beneficial effects:
[025] The improved method of the invention is suitable for the improvement and utilization of salt pond silt in the salinization area of soil. It reduces the earthwork transportation in the course of salt pond regulation and makes efficient use of the silt. This method provides a new method of soil improvement, which determines the depth of soil improvement by vegetation root characteristics and accelerates the cycle of soil improvement. This method not only reduces the project cost, but also reduces the maintenance cost. At the same time, the salt-alkali water collected in the blind pipe is collected and discharged into the municipal rainwater system or municipal sewage system through the drainage pipe, so as to avoid the technical problems of environmental pollution caused by the salt-alkali water leakage in the drainage well. By building blocks and mortar into a well body enclosing the plastic inner tank, a complete container of salt well can be formed, which can avoid the salinization of the soil environment by leaking the saline-alkali liquid into the surrounding soil. The bottom of the plastic inner tank is arranged as a hemispherical shell, which is easy to clean up the sediment at the bottom of the plastic inner tank, so as to achieve the long-term technical purpose. At the same time, a drainage pipe which is lower than the blind pipe is arranged in the salt drainage well, and the drainage pipe is connected with the municipal rainwater system or the municipal sewage system, and the saline-alkali water is collected through the blind pipe into the salt drainage well, and then the drainage pipe is fed into the municipal rainwater system or the municipal sewage system, so as to avoid the technical problems that the saline-alkali water can't be collected in the salt drainage well.
[026] Many exemplary embodiments of the present invention are described in detail, which should not be considered a limitation of the invention, but rather should be understood as a more detailed description of some aspects, features and embodiments of the present invention.
[027] It should be understood that the terms described herein is for the purpose of describing particular embodiments only and is not intended to be limitation of the invention. In addition, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed as far as the numerical range in the present invention is concerned. Each smaller range between intermediate values within any stated value or stated range and any other stated value or intermediate values within the stated range is also included within the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded within the range.
[028] Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention relates. Although the present invention describes only preferred methods and materials, any methods and materials similar or equivalent to those described herein may be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference for the purpose of disclosing and describing methods and/or materials related to said documents. Where contradictions exist, the definitions in this specification prevail.
[029] It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present specification without departing from the scope or spirit of the invention. Other embodiments of the invention will be apparent to those skilled in the art from the description of the invention. The specification and embodiments of the present application are exemplary only.
[030] As used herein, terms "comprising", "comprising", "having", "containing", and the like, are intended to be open terms, i. e., intended to include, but not be limited to.
[031] EMBODIMENTS 1
[032] The saline-alkali soil in coastal area was selected, and the depth of soil was cm. After measuring the salt content of the surrounding soil, the surface soil with salt content less than 2% was pushed to the side of the boundary.
[033] One side of the saline-alkali soil was excavated, then rolled and leveled mechanically and the excavation depth was 1.3 meters. Salt exclusion blind ditch was excavated with a spacing of 8 meters. A stone nitrite of1-3cm was backfilled for 30cm to form the leaching layer after the 30 cm*30 cm of blind tube was set up; the non woven cloth was laid on the leaching layer, and the non-woven cloth specifications was of 100 g/m2 ; the salt exclusion well was built, and the longitudinal geotextile was laid and fixed;
[034] The salt exclusion well comprises a concrete cushion, barrel-shaped plastic inner casing, well casing, well casing, and well cover, the plastic inner casing above is mounted at the top center of the concrete cushion, and the concrete cushion above is constructed of blocks and mortar to form a well body enclosing the plastic inner lining, The well sleeve above is fixed to the top of the well body by bolts. The well cover above is arranged on the well casing. The bottom of the plastic inner casing above is provided with a drainage pipe interface, one blind pipe interface at least, and the horizontal height of the blind pipe interface is higher than the horizontal height of the drainage pipe interface. The other end of the drainage pipe is connected with the municipal rainwater system or the municipal sewage system.;
[035] The silt soil on the side without the salt exclusion project was excavated and flattened, the depth of excavation was 1.5 meters, the salt exclusion blind drain was excavated with the spacing of 2 meters, and A stone nitrite of 1-3cm was backfilled for cm to form the leaching layer after the 30 cm*30 cm of blind tube was set up; and the non-woven cloth was laid on the leaching layer, the specification of non-woven fabric was 100 g/m2 .
[036] The saline-alkali silt soil excavated twice was backfilled to the design height after mixed with the conditioner in different places.
[037] The salt pond silt is mixed with a conditioner according to the salt content of the soil.
[038] Specifically: the soil salt content is divided into three kinds, the soil salt content is less than 1.5%, the soil salt content is 1.5%-3%, the soil salt content is more than 3%;
[039] When the soil salt content is less than 1.5%, the conditioner includes straw or garden waste, mountain sand and organic fertilizer. The volume ratio of each component to the whole soil is 10%, 10% and 5%.
[040] When the soil salt content is 1.5%-3%, the conditioner includes straw or garden waste, mountain sand and organic fertilizer. The ratio of each component to the whole soil is 15%, 10% and 6%.
[041] When the soil salt content is more than 3%, the conditioner includes straw or garden waste, mountain sand and organic fertilizer, among which the volume ratio of each component is 25%, 20% and 8%.
[042] The improved fertilizer is applied on the backfilled ground, and mixed with rotary tillage. The improved fertilizer mentioned-above is an acid modified fertilizer containing active calcium ion, and the thickness of the improved fertilizer is 20% of the rotary tillage depth.
[043] A number of narrow border with a length of 10 m and a width of 1 m were irrigated with intermittent irrigation, and the ratio of water to soil was 1: 1.
[044] Planted reed.
[045] The experiment proved that the survival rate of reed planted in saline-alkali soil after the above treatment was 95%, and during the process, the high concentration of saline-alkali water collected in the salt exclusion well flowed into the municipal sewage system through the drainage pipe, and no high concentration of saline-alkali water overflow occurred. The salt content of the surrounding soil was detected and the results showed that there was no salinization of the soil around the salt exclusion well, so, The technical scheme of the invention realizes the improvement of saline-alkali soil.
[046] Although the invention has been described with reference to specific examples, it will be appreciated by those skilled in the art that the invention may be embodied in many other forms, in keeping with the broad principles and the spirit of the invention described herein.
[047] The present invention and the described embodiments specifically include the best method known to the applicant of performing the invention. The present invention and the described preferred embodiments specifically include at least one feature that is industrially applicable
Claims (9)
1. A soil improvement methods for saline-alkaline land, wherein it includes following steps:
(1) Pushing the surface soil with salt content less than 2% longitudinally along the salt pond to the side of the boundary;
(2) Rolling and leveling the saline-alkali soil after excavating the silt soil on the side of it, and then excavating the salt exclusion blind drain, backfilling the stone nitrite and the blind pipe to constitute a leaching layer; building the salt exclusion well, and laying and fixing the longitudinal geotextile;
(3) Rolling and leveling the salt-alkali soil after excavating the silt soil on the side without the salt exclusion project, and then backfilling the leaching layer, backfilling the stone nitrite and the blind pipe to constitute leaching layer, and the excavation depth is greater than the excavation depth of the step (2);
(4) Mixing the saline-alkali silt soil excavated twice in different places evenly and backfilling it to the design height.
2. The soil improvement method for saline-alkali soil according to claim 1, wherein the blind pipe of salt pond soil is buried at a depth of 1.3 meters with a spacing of 8 meters in step (2); the blind pipe of saline-alkali soil is buried at a depth of 1.5 meters with a spacing of 2-3 meters in step (6); the specification of the backfill stone is 1-3 cm, the specifications of the blind pipe is 30cm*30cm and the blind pipe is a double walled corrugated pipe with a height of 30cm in step (2) and step (3);.
3. The soil improvement method for saline-alkali soil according to claim 1, wherein non-woven cloth was laid on the leaching layer and the specification of non woven cloth is 60-1OOg/m 2 in the steps (2) and (3).
4. The soil improvement method for saline-alkali soil according to claim 1, wherein the salt pond silt is mixed with a conditioner according to the salt content of the soil in the step (4),;
Specifically, the soil salt content is divided into three kinds. the soil salt content is less than 1.5%, the soil salt content is 1.5%-3%, and the soil salt content is more than 3%;
When the soil salt content is less than 1.5%, the conditioner includes straw or garden waste, mountain sand and organic fertilizer. The volume ratio of each component to the whole soil is 8-12%, 8-12%, 4-6% respectively.
When the soil salt content is 1.5%-3%. The conditioner includes straw or garden waste, mountain sand and organic fertilizer. The ratio of each component to the whole soil is 13-17%, 8-12%, 5-7% respectively.
When the soil salt content is more than 3%, the conditioner includes straw or garden waste, mountain sand, organic fertilizer body, the volume ratio of each component is 23-27%, 18-22%, 6-10% respectively.
5. The soil improvement method for saline-alkali soil according to claim 1, wherein it also includes followings.
(5) Applying improved fertilizer on the backfilled ground and mixing it by rotary tillage;
(6) Casting out a number of narrow border for irrigation.
6. The soil improvement method for saline-alkali soil according to claim 5, wherein the improved fertilizer mentioned-above is an acid improved fertilizer containing activated calcium ions, and the thickness of the improved fertilizer is 18 22% of the rotary tillage depth.
7. The soil improvement method for saline-alkali soil according to claim 5, wherein the length of the narrow border is 8-12 m; the width is 0.8-1.2 m; intermittent irrigation is used, and the ratio of water to soil is 1.2: 1~0.9: 1.
8. The soil improvement method for saline-alkali soil according to claim 1, wherein the salt exclusion well comprises concrete cushion, barrel-shaped plastic inner casing, well casing, and well cover, the plastic inner casing above is mounted at the top center of the concrete cushion, and the concrete cushion above is constructed of blocks and mortar to form a well body enclosing the plastic inner lining, The well sleeve above is fixed to the top of the well body by bolts. The well cover above is arranged on the well casing. The bottom of the plastic inner casing above is provided with a drainage pipe interface, one blind pipe interface at least, and the horizontal height of the blind pipe interface is higher than the horizontal height of the drainage pipe interface. The other end of the drainage pipe is connected with the municipal rainwater system or the municipal sewage system.
9. The soil improvement method for saline-alkali soil according to claim 8, wherein the bottom of the plastic inner tank mentioned-above is hemispherical shell shaped.
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Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112655303A (en) * | 2020-12-16 | 2021-04-16 | 甘肃建投生态建设集团有限公司 | Improvement method suitable for saline-alkali soil |
CN112806124A (en) * | 2021-01-05 | 2021-05-18 | 神华神东煤炭集团有限责任公司 | Construction method for constructing vegetation pit in coal mining subsidence area |
CN112825642A (en) * | 2020-12-31 | 2021-05-25 | 新疆维泰开发建设(集团)股份有限公司 | Construction method for planting lawn in slight saline-alkali soil |
CN113079731A (en) * | 2021-03-26 | 2021-07-09 | 海田稻香(北京)农业科技有限公司 | Coastal saline soil improvement method |
CN113207345A (en) * | 2021-05-18 | 2021-08-06 | 中国科学院东北地理与农业生态研究所 | Saline-alkali soil improvement method for salt discharge by covering sand pipes |
CN113366943A (en) * | 2021-06-02 | 2021-09-10 | 山东世鑫建设工程有限公司 | Undercurrent landscape saline-alkali soil greening system based on river |
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CN114027133A (en) * | 2021-11-08 | 2022-02-11 | 鲁东大学现代农业高质量发展产教融合东营基地 | Coastal saline-alkali soil improvement structure and improvement method |
CN114531988A (en) * | 2022-03-23 | 2022-05-27 | 天津绿茵景观生态建设股份有限公司 | Desalination structure and desalination method for improving saline-alkali soil |
CN114708242A (en) * | 2022-04-14 | 2022-07-05 | 自然资源部国土整治中心 | Method and device for breaking impervious layer of saline-alkali soil to realize salt and alkali discharge |
CN114710990A (en) * | 2022-04-27 | 2022-07-08 | 中国水产科学研究院渔业机械仪器研究所 | Construction method of saline-alkali pond ridge ecological slope |
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CN117322188A (en) * | 2023-10-30 | 2024-01-02 | 天津市方正建设监理有限公司 | Soil salinization treatment method |
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CN112655303A (en) * | 2020-12-16 | 2021-04-16 | 甘肃建投生态建设集团有限公司 | Improvement method suitable for saline-alkali soil |
CN112825642A (en) * | 2020-12-31 | 2021-05-25 | 新疆维泰开发建设(集团)股份有限公司 | Construction method for planting lawn in slight saline-alkali soil |
CN112806124A (en) * | 2021-01-05 | 2021-05-18 | 神华神东煤炭集团有限责任公司 | Construction method for constructing vegetation pit in coal mining subsidence area |
CN113079731A (en) * | 2021-03-26 | 2021-07-09 | 海田稻香(北京)农业科技有限公司 | Coastal saline soil improvement method |
CN113207345A (en) * | 2021-05-18 | 2021-08-06 | 中国科学院东北地理与农业生态研究所 | Saline-alkali soil improvement method for salt discharge by covering sand pipes |
CN113366943A (en) * | 2021-06-02 | 2021-09-10 | 山东世鑫建设工程有限公司 | Undercurrent landscape saline-alkali soil greening system based on river |
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