CN102870523B - Terrain processing method for improving seashore solonchak - Google Patents

Terrain processing method for improving seashore solonchak Download PDF

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CN102870523B
CN102870523B CN201210370802.2A CN201210370802A CN102870523B CN 102870523 B CN102870523 B CN 102870523B CN 201210370802 A CN201210370802 A CN 201210370802A CN 102870523 B CN102870523 B CN 102870523B
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ditch
bottom width
soil
drain
depth
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CN102870523A (en
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郑勇平
邵春荣
范文锋
葛映川
张蕴
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Zhejiang Senhe Seed Co Ltd
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Zhejiang Senhe Seed Co Ltd
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Abstract

A terrain processing method for improving seashore solonchak belongs to the technical field of soil improvements and includes the steps of firstly, building a drainage system; secondly, building a reservoir; thirdly, flattening land; and fourthly, lifting soil to prepare the land. The terrain processing method for improving seashore solonchak has the advantages that removing salinized surface oil is not needed so that labor is economized; natural rainwater collected is reasonably utilized, no diversion irrigation is needed, investment is low, and accordingly fresh water resources are economized; underground water level is reduced indirectly by turtleback planting lots, salt reduction is accelerated, and survival rate of seedlings can be increased. Saline-alkali soil can be reformed by the terrain processing method for improving seashore solonchak, and the survival rate of each seedling can reach more than 90%.

Description

A kind of landform processing method of Reclamation of coastal saline soil
Technical field
The invention belongs to land improvement method and technology field, be specially a kind of landform processing method of Reclamation of coastal saline soil.
Background technology
Marine solonchak is formed by seawater salt marsh, the salt of its soil and groundwater is grouped into consistent with seawater, main containing the solubility salt based on sodium chloride, not only upper soll layer salification weight, subsoil salt content is also very high, therefore vegetation is rare, unmodified can not carry out crop cultivation, only has only a few salt-tolerant plant kind to survive.The Liaodong Wan, Bohai Sea Gulf, Laizhou Wan, Hangzhou Wan etc. of China's coastal region, large-area marine solonchak is all had to exist, and due to seawater alluvial with wash away the effect of grade, its area is in continuous expansion, and the lasting modified utilization of marine solonchak has become the important means promoting that coastal region agriculture and forestry develop.
For solving marine solonchak green plant planting technique problem, for a long time, conducting extensive research its modified utilization and afforestation both at home and abroad, finding can to decline then 60%-80% by lifting native whole surface layer chesson salt content, the process of old place shape is the very important step of alkaline land improving.A kind of alkali-removing modifying method far alkaline land is disclosed in patent document (CN101024226A), wherein relate to the layout of row's alkali ditch, but the method does not design cistern, but diversion irrigation row alkali, required diversion often, cost is high, and the cycle is long, and this patent does not make the detailed description of quantification to improved effect.
Summary of the invention
For the above-mentioned problems in the prior art, the object of the invention is to design the technical scheme of the landform processing method that a kind of Reclamation of coastal saline soil is provided, drainage system construction and landform processing mode are improved and innovated, there is the advantages such as investment is little, salt reduction is effective.
The landform processing method of described a kind of Reclamation of coastal saline soil, is characterized in that comprising the following steps:
1) drainage system construction: first carry out wholely with drain ditch construction, be set to a standard paragraphs every 40-60m, in each standard paragraphs, drainage ditch network be set, drainage ditch network by needs transformation solonchak be divided into fritter; The form of employing underground, drain ditch covered conduit, the sandstone of 5-10cm is laid in bottom, and sandstone discharges flexible porous tube, and earth covers;
2) cistern construction: according to the solonchak area that need transform and local rainfall information, considers design cistern specification, according to transformation solonchak area: cistern area is that the ratio of 150-200:1 builds rain water reservoir; Cistern surrounding antiseepage film covers, degree of depth 1.3-1.8m;
3) level land: the community that each block drain ditch smooth fences up, drainage grade is 2-4 ‰, and the earthwork is smooth on the spot, and because of gesture appearance, being beneficial to draining is primary standard;
4) time of lifting the whole ground of soil, in saturating rain drip washing, gets pine table soil and lifts soil wholely after surface soil salinity significantly declines.
The landform processing method of described a kind of Reclamation of coastal saline soil, is characterized in that: the drainage ditch network described in step 1) is made up of 5 grades of crisscross drain ditchs, the upper bottom width 1.3-1.7m in one-level drain ditch, lower bottom width 0.6-1.0m, ditch depth 0.8-1.2m; The upper bottom width 1.0-1.4m of Municipal secondary effluent ditch, lower bottom width 0.4-0.8m, ditch depth 0.6-1.0m; The upper bottom width 0.6-1.0m in three grades of drain ditchs, lower bottom width 0.2-0.6m, ditch depth 0.3-0.7m; The upper bottom width 0.3-0.7m in level Four drain ditch, lower bottom width 0.2-0.4m, ditch depth 0.2-0.4m; The upper bottom width 0.3m in Pyatyi drain ditch, lower bottom width 0.2m, ditch depth 0.2m.
The landform processing method of described a kind of Reclamation of coastal saline soil, is characterized in that: the drainage ditch network described in step 1) is made up of 4 grades of crisscross drain ditchs, the upper bottom width 3-5m in one-level drain ditch, lower bottom width 1-3m, ditch depth 1-3m; The upper bottom width 1-3m of Municipal secondary effluent ditch, lower bottom width 0.5-1.5m, ditch depth 0.8-1.5m; The upper bottom width 0.6-1.2m in three grades of drain ditchs, lower bottom width 0.4-0.8m, ditch depth 0.4-0.8m; The upper bottom width 0.3-0.7m in level Four drain ditch, lower bottom width 0.2-0.4m, ditch depth 0.3-0.7m.
The landform processing method of above-mentioned a kind of Reclamation of coastal saline soil, has the following advantages: 1) do not need to remove salinization topsoil, save labour; 2) collect natural rain water resource and carry out Appropriate application, do not need diversion irrigation, invest little, simultaneously fresh-water-saving resource; 3) the block-shaped indirect lowering of watertable of the plantation of turtleback, accelerates salt reduction effect, is conducive to the survival rate improving nursery stock.Adopt landform processing method of the present invention to carry out alkaline land improvement, plant percent all reaches more than 90%, and salt reduction is effective, invests little.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
One embodiment is described in detail in detail, but it is not limited to any one or similar example of these embodiments below.
1. implement ground overview
Southern Bank of Hangzhou Bay seashore line length 78.5 kilometers, height above sea level is about 2.0-4.0m only, and lowest part is 1.5m only; average subterranean water level is 69.9cm; easily cause subterranean water level higher and form waterlogging, thus coastal basic based on marine solonchak, mainly with the solubility salt based on sodium chloride.Vegetation is rare, and herbage plant is mostly the salt-enduring cultivars in the plants such as grayish green alkali fluffy and composite family, grass family, Chenopodiaceae.
Implementing the both sides of ground point selection at bridge spanning the sea south bank, due to the invasion and attack of the erosion or storm tide that are subject to seawater, is typical beach salty soil, saline and alkaline barren beach, summer and autumn, white salt layer accumulates in upper soll layer, and subterranean water level is higher, and soil salt content luffing is 0.017-1.12%.Bulk density of soil 1.34g/cm 3, porosity 11.3%, salt content 0.297%, pH value 9.28, organic 0.37%, available N 16.2mg/kg, available P 20.5mg/kg, active potassic 124.0mg/kg, soil moisture seepage is little, salt discharge is slow, and easily in the soil body, form water holding layer, the effect of the natural desalinization of soil by flooding or leaching is remarkable, though on the south six pools large stretch of plot, cultivated crops through more than 20 years, the salt content in some plot is also more than 0.2%.
2. implementation method and content
According to field condition, be set to a standard paragraphs, arrange drainage ditch network in each standard paragraphs every 50m, needs transformation solonchak is divided into fritter by drainage ditch network; The form of employing underground, drain ditch covered conduit, the sandstone of 5-10cm is laid in bottom, and sandstone discharges flexible porous tube, and earth covers; The effect of sandstone discharging flexible porous tube is exactly permeable, intercepts earth dirty, ensures that sand stone layer draining is unobstructed, is conducive to salinity and discharges in time.According to the solonchak area that need transform and local rainfall information, consider design cistern specification, according to transformation solonchak area: cistern area is that the ratio of 150-200:1 builds rain water reservoir; Cistern surrounding antiseepage film covers, degree of depth 1.3-1.8m.
The each standard paragraphs in side, the north of the Changjiang River establishes the one-level drain ditch of two North and South directions, and specification is bottom width=1.5m*1.0m*0.8m under upper bottom width * degree of depth *, and each standard paragraphs is divided into 3 longitudinal communities, cell-wide is respectively 15.7m, 15.7m, 15.6m from west to east.Build cement tub between standard paragraphs, wide 0.8-1.2m, main application is draining, is focused on by the current inside little ditch in the cement tub of large gauge and discharges; By 2 Municipal secondary effluent ditches, bottom width=1.2m*0.8m*0.6m under upper bottom width * degree of depth *, is divided into 3 horizontal communities by side, the north of the Changjiang River, widely from south to north, is respectively 20m, 30m, 20m; By three grades of drain ditchs in each horizontal community, bottom width=0.8m*0.5m*0.4m under upper bottom width * degree of depth *, is divided into the wide region for 10m, north and south; Again by level Four drain ditch, bottom width=0.5m*0.3m*0.3m under upper bottom width * degree of depth *, be divided into the wide region for 5m, north and south, Pyatyi drain ditch continues to be divided equally for Liang Ge plot, north and south.
The each standard paragraphs in side, the south of the River establishes the one-level drain ditch of two North and South directions, and specification is bottom width=4.0m*2.0m*2.0m under upper bottom width * degree of depth *, and each standard paragraphs is divided into 3 longitudinal communities, cell-wide is respectively 15.3m, 15.3m, 15.4m from west to east; By 2 Municipal secondary effluent ditches, bottom width=2.0m*1.2m*1.0m under upper bottom width * degree of depth *, is divided into 3 horizontal communities by side, the south of the River, widely from south to north, is respectively 29m, 29m, 21m; By three grades of drain ditchs in each horizontal community, bottom width=1.0m*0.6m*0.6m under upper bottom width * degree of depth *, is divided into the wide region for 9m, north and south; Again by level Four drain ditch, bottom width=0.5m*0.5m*0.3m under upper bottom width * degree of depth *, carrying out horizontal partition is the wide plot for 4.25m, north and south.
Level land, each block planting site is turtleback, earthwork in-situ balancing, and because of gesture appearance, being beneficial to draining is primary standard.The time of lifting the whole ground of soil, preferably by saturating rain drip washing, gets pine table soil and lifts soil wholely after surface soil salinity significantly declines.
3. implementation result: through above technical finesse, can Appropriate application rainwater resource, invests little; The species grow of planting is all right, and survival rate is to more than 90%; Planting-site salt reduction successful, the salt content comparing sedendary soil have dropped 0.25%-0.68%.
In the above-described embodiments: lay bottom drain ditch in step 1) 6,7,8 or the sandstone of 9cm; Step 2) in need the solonchak area transformed and the ratio of local rainfall information to be 160:1,170:1 or 180:1,190:1 or 200:1; The degree of depth of cistern is 1.4,1.5 or 1.6m; In step 3), drainage grade is 2.5,3 or 3.5 ‰; The other the same as in Example 1, also can obtain technique effect of the present invention.

Claims (6)

1. a landform processing method for Reclamation of coastal saline soil, is characterized in that comprising the following steps:
1) drainage system construction: first carry out wholely with drain ditch construction, be set to a standard paragraphs every 40-60m, in each standard paragraphs, drainage ditch network be set; Described drainage ditch network is made up of 5 grades of crisscross drain ditchs, the upper bottom width 1.3-1.7m in one-level drain ditch, lower bottom width 0.6-1.0m, ditch depth 0.8-1.2m; The upper bottom width 1.0-1.4m of Municipal secondary effluent ditch, lower bottom width 0.4-0.8m, ditch depth 0.6-1.0m; The upper bottom width 0.6-1.0m in three grades of drain ditchs, lower bottom width 0.2-0.6m, ditch depth 0.3-0.7m; The upper bottom width 0.3-0.7m in level Four drain ditch, lower bottom width 0.2-0.4m, ditch depth 0.2-0.4m; The upper bottom width 0.3m in Pyatyi drain ditch, lower bottom width 0.2m, ditch depth 0.2m; Needs transformation solonchak is divided into fritter by drainage ditch network;
The form of employing underground, drain ditch covered conduit, the sandstone of 5-10cm is laid in bottom, and sandstone discharges flexible porous tube, and earth covers;
2) cistern construction: according to the solonchak area that need transform and local rainfall information, considers design cistern specification, according to transformation solonchak area: cistern area is that the ratio of 150-200:1 builds rain water reservoir; Cistern surrounding antiseepage film covers, degree of depth 1.3-1.8m;
3) level land: the community that each block drain ditch smooth fences up, drainage grade is 2-4 ‰, and the earthwork is smooth on the spot, and because of gesture appearance, being beneficial to draining is primary standard;
4) time of lifting the whole ground of soil, after saturating rain drip washing, surface soil salinity significantly decline, gets table soil and lifts soil wholely.
2. a landform processing method for Reclamation of coastal saline soil, is characterized in that comprising the following steps:
1) drainage system construction: first carry out wholely with drain ditch construction, be set to a standard paragraphs every 40-60m, in each standard paragraphs, drainage ditch network be set; Described drainage ditch network is made up of 4 grades of crisscross drain ditchs, the upper bottom width 3-5m in one-level drain ditch, lower bottom width 1-3m, ditch depth 1-3m; The upper bottom width 1-3m of Municipal secondary effluent ditch, lower bottom width 0.5-1.5m, ditch depth 0.8-1.5m; The upper bottom width 0.6-1.2m in three grades of drain ditchs, lower bottom width 0.4-0.8m, ditch depth 0.4-0.8m; The upper bottom width 0.3-0.7m in level Four drain ditch, lower bottom width 0.2-0.4m, ditch depth 0.3-0.7m; Needs transformation solonchak is divided into fritter by drainage ditch network;
The form of employing underground, drain ditch covered conduit, the sandstone of 5-10cm is laid in bottom, and sandstone discharges flexible porous tube, and earth covers;
2) cistern construction: according to the solonchak area that need transform and local rainfall information, considers design cistern specification, according to transformation solonchak area: cistern area is that the ratio of 150-200:1 builds rain water reservoir; Cistern surrounding antiseepage film covers, degree of depth 1.3-1.8m;
3) level land: the community that each block drain ditch smooth fences up, drainage grade is 2-4 ‰, and the earthwork is smooth on the spot, and because of gesture appearance, being beneficial to draining is primary standard;
4) time of lifting the whole ground of soil, after saturating rain drip washing, surface soil salinity significantly decline, gets table soil and lifts soil wholely.
3. the landform processing method of a kind of Reclamation of coastal saline soil as claimed in claim 1 or 2, is characterized in that: the sandstone laying 6-9cm in step 1) bottom drain ditch.
4. the landform processing method of a kind of Reclamation of coastal saline soil as claimed in claim 1 or 2, is characterized in that: step 2) middle transformation solonchak area: cistern area is 160-180:1.
5. the landform processing method of a kind of Reclamation of coastal saline soil as claimed in claim 1 or 2, is characterized in that: step 2) in the degree of depth of cistern be 1.4-1.6m.
6. the landform processing method of a kind of Reclamation of coastal saline soil as claimed in claim 1 or 2, is characterized in that: in step 3), drainage grade is 2.5-3.5 ‰.
CN201210370802.2A 2012-09-29 2012-09-29 Terrain processing method for improving seashore solonchak Active CN102870523B (en)

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CN104115586B (en) * 2014-06-13 2015-12-09 宁波高新区围海工程技术开发有限公司 Heavy salinized ground administering method in one
CN105325225A (en) * 2014-08-08 2016-02-17 北京碧青园园林绿化工程有限公司 Method improving tree plantation survival rate in severe saline-alkali soil
CN106605469A (en) * 2015-10-26 2017-05-03 天津港海湾园林绿化有限公司 Coastal reclamation land ecological restoration and greening method
CN105519274B (en) * 2015-12-07 2018-11-30 南京大学 A kind of integrated approach of extensive coastal new Climacteric symptoms farmland ecology exploitation
CN106068754B (en) * 2016-07-25 2017-12-15 河北省农林科学院滨海农业研究所 The method of flour sand Muddy Bottoms strand tidal flat revegetation
CN109757144A (en) * 2018-05-28 2019-05-17 光大环境修复(江苏)有限公司 A kind of modification method of beach saline land
CN110249739A (en) * 2019-07-18 2019-09-20 段家贵 The soil body for improving newly-increased farmland water retention in soil builds method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101024226A (en) * 2007-04-16 2007-08-29 张耀文 Alkali-removing modifying method far alkaline land
RU2007132141A (en) * 2007-08-24 2009-02-27 Александр Борисович Курченко (RU) INTEGRATED TECHNOLOGY FOR RECULTIVATION OF SOILS CONTAMINATED BY OIL AND OIL-CONTAINING PRODUCTS
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