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Method for water seepage, salt discharge and afforestation of low-humidity saline and alkaline beach and application of method

A saline-alkali beach and landscaping technology, which is applied in the fields of desertification prevention and ecological environment restoration, can solve the problems of unrealistic irrigation and salt washing, poor activity of aerobic microorganisms, and deterioration of soil physical properties, so as to improve saline-alkali land afforestation and greening plants Fewer varieties, better response to uneven deformation performance, improved fertility level and physical and chemical properties

Active Publication Date: 2015-04-08
江苏绿之源生态建设有限公司
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  • Description
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AI Technical Summary

Problems solved by technology

[0002] Low-humidity saline-alkali land, especially coastal saline-alkali land has high groundwater level and salt content. Due to the accumulation of a large amount of salt on the surface, the physical properties of the soil deteriorate, the structure is sticky, compacted, poor ventilation, low permeability coefficient, strong capillary action, and aerobic type in the soil. The poor activity of microorganisms leads to the aggravation of surface soil salinization, which is unfavorable or even unsuitable for plant growth and development. For artificially constructed vegetation, physiological drought and burn death are common.
Over the years, most of the improvement and treatment of saline-alkali land have followed the natural law of "salt comes with water, salt goes with water", carried out necessary drainage and salt washing measures, combined with biological improvement, chemical improvement and other methods, and received very good results , but due to the lack of fresh water resources in our country, large-scale irrigation and salt washing are not realistic, and it is easy to repeat
In addition, the cost of drainage measures for saline-alkali land in the construction system is relatively high, and open ditch drainage is used to divide and break up the saline-alkali land, and there are too many open ditch, so the phenomenon of collapse and blockage is unavoidable
In the combination of light and dark drainage methods, sand-free cement pipes, plain concrete pipes, PVC pipes, soft spring pipes, etc. are commonly used for concealed pipes. Among them, sand-free cement pipes are the most widely used, and their salt and alkali discharge effects are better, but they are easy to break. Higher cost
Most of the other pipe materials require sandstone cushion and filter material wrapping, etc., which require many procedures and a large investment

Method used

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  • Method for water seepage, salt discharge and afforestation of low-humidity saline and alkaline beach and application of method
  • Method for water seepage, salt discharge and afforestation of low-humidity saline and alkaline beach and application of method
  • Method for water seepage, salt discharge and afforestation of low-humidity saline and alkaline beach and application of method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1 Traditional saline-alkali land treatment method

[0042] see figure 1 and Figure 4 .

[0043] 1. Excavate drainage ditches 3 in the direction from high to low on the saline-alkali land to be treated, and the drainage ditches 3 are arranged according to the topography to facilitate drainage. The drainage ditch 3 is 20m apart, and the depth is 1m from the surface.

[0044] 2. After excavating the drainage ditch 3, the surface layer of the plot is covered with compost of livestock and poultry excrement (10m 3 per mu), mechanically plowed, the plowing depth is 30cm, and the organic fertilizer is turned to the bottom.

[0045] 3. In the plowed plot, excavate the buried pipe 4 evenly perpendicular to the drainage ditch, the ditch width is 40cm, the ditch depth is 40cm, the distance between the ditch is 5m, and the longitudinal slope ratio of the ditch bottom is 0.8%.

[0046] 4. Use a 5cm gravel cushion at the bottom of the ditch, lay the concealed pipe 5 on the...

Embodiment 2

[0049] Embodiment 2 Scheme 1 of the present invention (Shandong Hekou District Saline-alkali Land Project)

[0050] 1. In the saline-alkali land to be treated, combined with the natural terrain, in accordance with the requirements of landscape planning and green belt construction, adopt the landscape micro-topography model of low excavation and high filling to form three low-lying water catchment areas for drainage and salt discharge. The catchment surface accounts for the total treatment 12.7% of the area. Drainage ditches shall be excavated in the direction from high to low and lead to the low-lying catchment area for easy drainage. The distance between drainage ditches 3 is 40m, and the depth is 1.2m from the ground surface.

[0051] 2. After the excavation of the drainage ditches, the surface layer of the plot is covered with compost of livestock and poultry excrement (10m 3 per mu) and then mechanically plowed to a depth of 20 cm, and the organic fertilizer was turned t...

Embodiment 3

[0058] Embodiment 3 The present invention scheme 2 Hekou District, Shandong Province

[0059] This example is a supplement to Example 2, that is, the shallow dense seepage and salt discharge method, which improves the energy efficiency of the overall system seepage and salt discharge. Change the flexible water seepage and salt drainage belt composed of 3 groups of cells in the ground 4 step in Example 2 to a single seepage and salt discharge pipe composed of 1 cell, and the layout distance is reduced from 6m to 2m, forming a shallow layer Intensive seepage and salt discharge method.

[0060] Compared with Example 2, on the basis of the same investment, the distance of the drainage belt is shortened by 3 times, and the seepage and salt discharge efficiency is increased by nearly 20% on the original basis.

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Abstract

The invention provides a method for water seepage, salt discharge and afforestation of a low-humidity saline and alkaline beach. The method comprises the following steps of: (1) performing landscape micro-terrain modeling finishing on a saline and alkaline land parcel to be governed to form orographic uplift afforestation areas and low-lying water catchment and salt discharge areas, and excavating drainage ditches in a direction from high to low; (2) turning over the earth surface; (3) excavating flexible water seepage and salt discharge tape burying ditches; (4) arranging flexible water seepage and salt discharge tapes at the bottoms of the ditches; (5) forming intersected water barrier ridges; (6) adding an organic fertilizer, and plowing and harrowing a surface layer; (7) arranging integrated flexible salt discharge and air permeation shafts; and (8) cultivating and sowing saline-alkali-resistant arbor-shrub-grass plants on saline and alkaline land which is comprehensively governed and improved. A set of feasible comprehensive technical method is provided for the comprehensive governance and afforestation of saline and alkaline land in large areas; and the method is favorable for improving the afforestation effect and level of saline and alkaline areas.

Description

technical field [0001] The invention belongs to the fields of desertification prevention and restoration and ecological environment restoration, and in particular relates to a method for improving saline-alkali land and its application. Background technique [0002] Low-humidity saline-alkali land, especially coastal saline-alkali land, has a high groundwater level and salt content. Due to the accumulation of a large amount of salt on the surface, the physical properties of the soil deteriorate, and the structure is sticky, compacted, poor air permeability, low permeability coefficient, strong capillary action, and aerobic type in the soil. The poor activity of microorganisms leads to the intensification of surface soil salinization, which is not conducive to or even unsuitable for plant growth and development. For artificially constructed vegetation, physiological drought and burn death are common. Over the years, most of the improvement and treatment of saline-alkali land ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01B79/02
CPCY02A40/10Y02A40/22Y02P60/40
Inventor 辜再元祁有祥王京燕
Owner 江苏绿之源生态建设有限公司
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