CN105144895A - Method for quickly desalinizing mud flat saline and alkaline land by laying sludge on surface layer - Google Patents
Method for quickly desalinizing mud flat saline and alkaline land by laying sludge on surface layer Download PDFInfo
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- CN105144895A CN105144895A CN201510401557.0A CN201510401557A CN105144895A CN 105144895 A CN105144895 A CN 105144895A CN 201510401557 A CN201510401557 A CN 201510401557A CN 105144895 A CN105144895 A CN 105144895A
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Abstract
The invention relates to the technical field of desalinization of mud flat saline and alkaline lands, particularly a method for quickly desalinizing a mud flat saline and alkaline land by laying sludge on a surface layer. The method comprises the steps: circularly building ridges 30-40 cm high around a paving range, and distributing an irrigation and drainage system; uniformly paving river and lake dredging sludge 30 cm thick on the surface of the mud flat saline and alkaline land; irrigating fresh water on the surface of sludge and maintaining 10-15 cm of a water layer; directly planting rice on the surface of sludge; and carrying out irrigation according to the growing requirement of rice, and in a water requiring stage for rice growth, ensuring that the water layer is properly 10-15 cm. Rice is planted in the sludge layer, the purpose of washing salt and pressing alkali is achieved by virtue of continuous infiltration of irrigation water for rice, the desalinizing speed of the mud flat saline and alkaline land is accelerated, the quality of mud flat soil is improved, and the mud flat soil is quickly reclamated to be used.
Description
Technical field
The present invention relates to beach saline-alkali ground desalting processing technical field, be specifically related to a kind of top layer and lay mud the method for quick desalination is carried out to beach saline-alkali.
Background technology
Tidal Flat Reclamation and exploitation are ploughed one of the main path supplemented in China's Coastal Areas, has important strategic importance to China's Coastal Areas agricultural and economic sustainable development.China's beach area is about 2,500,000 hm
2, and annual with 5000hm
2the one-tenth Lu Sudu of left and right extends to sea.Because most of beach is formed by reclaiming coastal land, the high salinity of soil, underground water high mineralization degree and the shallow embedding degree of depth, soil salt marsh evil are seriously the key constraints that beach utilizes.Up to now, the utilization rate of the shore reclamation of China is less than 50%.Due to beach saline-alkali belong to sandy silt soil property, soil property is barren, is difficult to the nutrient provided needed for the growth of plant.In the process relying on natural precipitation or irrigation leaching desalination, washing water is downward through stratum fast, makes washing water fail to give full play to Leaching and desalinization ability and namely runs off, greatly reduce the desalting efficiency of leacheate.
In recent years, the lake dredging up such as China Taihu Lake creates a large amount of mud.These heavy metal in sludges and poisonous and harmful substance content low, simultaneously containing nutriments such as abundant organic matter and N, P.For a long time, south of the River Ring theory all uses these mud also field, to increase soil fertility.The amount of sludge that the desilting engineering of present stage produces is very huge, needs a lot of silt stockyard to stack, occupies a large amount of land resources; Mud is in stacking process, and the nutriments such as N, P easily leach with tail water, produces secondary pollution to surrounding water.Sludge granules is less, and clay content is higher, has the effect of being filled with water preferably.Be laid on beach saline-alkali ground surface, rice cultivation can be directly used in, reduce the osmotic coefficient on top layer, saline land simultaneously, reduce fresh water infiltration rate, by using irrigation fresh water a small amount of as far as possible, keep its lasting infiltration downwards, reach the desalinization of soil by flooding or leaching and the salty effect of pressure, and can effectively prevent from rising the accumulation of salt in the surface soil phenomenon produced due to capillary water.
Now widely used desalting salinized soil technology is fresh water elution technique and Rice Cropping water-washing technique mainly.Leaching and desalinization method mainly adopts atmospheric precipitation or irrigates directly carries out drip washing to saline land, and because the saturating coefficient of alkaline land soil is comparatively large, leacheate permeates comparatively fast in lessivation, can fast strikethrough stratum.Therefore in lessivation, need the water of at substantial, cause the waste of water resource, the time of Leaching and desalinization is also relatively long.Adopt Rice Cropping water-washing technique to carry out desalination to saline land, then often because alkaline land soil is barren, Nutrient deficiency, cause paddy growth slow, output is extremely low.Use the method in the present invention, the necessary condition needed for paddy rice life can be provided at top layer, saline land laying mud, improve rice yield, reduce the fresh water infiltration rate in saline land simultaneously, keep irrigating fresh water and keep fresh water lasting infiltration downwards, improve desalting salinized soil elution efficiency, reduce the consumption of drip washing fresh water.Use top layer to lay mud desalination with carrying out beach saline-alkali, be expected to the salt affected soil effectively improving Climacteric symptoms on a large scale.
Summary of the invention
The object of this invention is to provide a kind of top layer to lay mud and carry out the method for quick desalination to beach saline-alkali, it is at mud rice cultivation, utilize Rice irrigation water continue under ooze, reach the desalinization of soil by flooding or leaching and press salty object, accelerate the desalination speed on beach saline-alkali ground, improve mud-flat soil quality, guarantee to reclaim fast in beach soil and utilize.
In order to solve the problem existing for background technology, the present invention is by the following technical solutions: its step is as follows: 1. enclose at the surrounding mud of saline land process range and build the high ridge of 30-40cm, and lay irrigation and drainage system;
2. thick lake, the river desilting mud of 30cm is evenly laid at beach saline-alkali ground surface;
3. muck surface irrigates fresh water, and maintenance water layer is 10-15cm;
4. muck surface directly carries out Rice Cropping;
5. according to the growth requirement of paddy rice, irrigate, need the water stage at paddy growth, ensure that water layer is that 10-15cm is advisable.
Described step
the mud that middle laying mud is river, lake dredging up produces, this kind of sludge granules is less, clay content is high, moisture content is at about 100-150%, the nutriments such as N, P of rich content (N content 500mg/kg-600mg/kg, P content 400mg/kg-500mg/kg), heavy metal and poisonous and harmful substance content are lower than standard of soil environment quality value.
Beneficial effect of the present invention: 1) lay mud on top layer, saline land, can improve saline land topsoil structure, increase soil fertility, builds the condition being applicable to paddy growth, and compared with Rice Cropping water-washing technique, rice yield improves 30%.
2) laying mud in top layer, saline land can change soil structure, reduce fresh water infiltration rate, while keeping fresh water lasting infiltration downwards, reduce the usage amount of fresh water, reach the desalinization of soil by flooding or leaching and press salty effect, and effectively can prevent the accumulation of salt in the surface soil phenomenon because capillary water rising produces.
3) utilize lake desilting mud in laying river, top layer to carry out the method for quick desalination to beach saline-alkali, need to use a large amount of mud, complete the process of mud while making desalting salinized soil, solve the problem that a large amount of stockyard of desilting requirement of engineering is deposited.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Embodiment: the implementation case is beach ground in certain river mouth sea wall.Use Taihu Lake desilting mud, demonstration area area is 5 mu.
Concrete operations comprise the following steps:
Enclose at the surrounding mud of saline land process range and build the high ridge of 40cm, and lay irrigation and drainage system;
Thick lake, the river desilting mud of 30cm is evenly laid at beach saline-alkali ground surface;
Muck surface irrigates fresh water, and maintenance water layer is 15cm;
Muck surface directly carries out Rice Cropping;
Require to irrigate according to the growth of paddy rice, the water stage is needed at paddy growth, ensure that water layer is 15cm, for repeating enforcement 3 years by this patent, compare top layer with not laying the control sample of mud, within 3 years, accumulative rice yield adds 65%, and reduce water consumption more than 70%, soil salt content is close.
The above, only in order to technical scheme of the present invention to be described and unrestricted, other amendment that those of ordinary skill in the art make technical scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (2)
1. top layer is laid mud and is carried out the method for quick desalination to beach saline-alkali, it is characterized in that its step is as follows:
1. enclose at the surrounding mud of saline land process range and build the high ridge of 30-40cm, and lay irrigation and drainage system;
2. thick lake, the river desilting mud of 30cm is evenly laid at beach saline-alkali ground surface;
3. muck surface irrigates fresh water, and maintenance water layer is 10-15cm;
4. muck surface directly carries out Rice Cropping;
5. according to the growth requirement of paddy rice, irrigate, need the water stage at paddy growth, ensure that water layer is that 10-15cm is advisable.
2. a kind of top layer according to claim 1 is laid mud and is carried out the method for quick desalination to beach saline-alkali, it is characterized in that step
the mud that middle laying mud is river, lake dredging up produces, this kind of less clay content of sludge granules is high, moisture content is at about 100-150%, the nutriments such as N, P of rich content (N content 500mg/kg-600mg/kg, P content 400mg/kg-500mg/kg), heavy metal and poisonous and harmful substance content are lower than standard of soil environment quality value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510401557.0A CN105144895A (en) | 2015-07-10 | 2015-07-10 | Method for quickly desalinizing mud flat saline and alkaline land by laying sludge on surface layer |
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|---|---|---|---|
| CN201510401557.0A CN105144895A (en) | 2015-07-10 | 2015-07-10 | Method for quickly desalinizing mud flat saline and alkaline land by laying sludge on surface layer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105537256A (en) * | 2016-02-01 | 2016-05-04 | 南京林业大学 | Removal method for salt in high-salinity soil |
| WO2017008473A1 (en) * | 2015-07-13 | 2017-01-19 | 河海大学 | Desalination method by using sludge to improve topsoil of saline and alkaline land |
| CN107996056A (en) * | 2017-11-13 | 2018-05-08 | 潍坊友容实业有限公司 | A kind of formula administering method of gathering materials on the spot in Yellow River irrigation salt-soda soil |
| CN110122229A (en) * | 2019-06-11 | 2019-08-16 | 江苏省沿海开发(东台)有限公司 | A kind of direct sowing of rice field planting method suitable for strand shallow lake slurry type aleuritic texture salt-soda soil |
| CN111395253A (en) * | 2020-03-27 | 2020-07-10 | 河海大学 | Method for preventing reservoir salinization in coastal region by setting brackish water level |
| CN116368984A (en) * | 2023-04-10 | 2023-07-04 | 中国水利水电科学研究院 | Method for cooperatively solving water shortage and salinization of oasis irrigation in arid region |
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| CN1631822A (en) * | 2005-01-04 | 2005-06-29 | 北京师范大学 | Method for in-situ utilizing river sludge |
| CN1981568A (en) * | 2005-12-16 | 2007-06-20 | 上海市金山区园林管理署 | Halogenic soil planting technique on seashore |
| CN102939806A (en) * | 2012-11-21 | 2013-02-27 | 清华大学 | Method and system for desalting soil of coastal saline and alkaline land |
| CN103947320A (en) * | 2014-04-17 | 2014-07-30 | 山东潍坊东盛园艺有限公司 | Tree planting method and tree planting structure in coastal saline and alkaline area |
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| RU2109425C1 (en) * | 1996-08-30 | 1998-04-27 | Галина Эрднеевна Настинова | Soil desalinization method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017008473A1 (en) * | 2015-07-13 | 2017-01-19 | 河海大学 | Desalination method by using sludge to improve topsoil of saline and alkaline land |
| CN105537256A (en) * | 2016-02-01 | 2016-05-04 | 南京林业大学 | Removal method for salt in high-salinity soil |
| CN107996056A (en) * | 2017-11-13 | 2018-05-08 | 潍坊友容实业有限公司 | A kind of formula administering method of gathering materials on the spot in Yellow River irrigation salt-soda soil |
| CN110122229A (en) * | 2019-06-11 | 2019-08-16 | 江苏省沿海开发(东台)有限公司 | A kind of direct sowing of rice field planting method suitable for strand shallow lake slurry type aleuritic texture salt-soda soil |
| CN111395253A (en) * | 2020-03-27 | 2020-07-10 | 河海大学 | Method for preventing reservoir salinization in coastal region by setting brackish water level |
| CN111395253B (en) * | 2020-03-27 | 2021-07-09 | 河海大学 | Method for preventing reservoir salinization in coastal region by setting brackish water level |
| CN116368984A (en) * | 2023-04-10 | 2023-07-04 | 中国水利水电科学研究院 | Method for cooperatively solving water shortage and salinization of oasis irrigation in arid region |
| CN116368984B (en) * | 2023-04-10 | 2023-11-10 | 中国水利水电科学研究院 | Method for cooperatively solving water shortage and salinization of oasis irrigation in arid region |
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Application publication date: 20151216 |