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Draining and salt-removing method for newly-ploughed salinized farmland

A farmland and water pipe technology, applied in soil drainage, agriculture, soil lifting machinery, etc., can solve the problems of inability to ensure drainage, easy collapse and silting, and high soil salinity, so as to improve land utilization and avoid large investment. , the effect of expanding the scope of application

Inactive Publication Date: 2011-05-18
INST OF SOIL & FERTILIZER XINJIANG ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high salt content and poor structure of the soil, the stability of the canal system is very poor. The drainage of the open channel is very easy to collapse and silt up or cause serious soil erosion. The open channel will often collapse and silt half within a year, and its drainage effect cannot be guaranteed, seriously affecting Improvement and utilization of salinized farmland

Method used

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  • Draining and salt-removing method for newly-ploughed salinized farmland
  • Draining and salt-removing method for newly-ploughed salinized farmland

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Concealed pipe material selection: use 100 mm PVC plastic sewer pipe, and uniformly punch small holes with a diameter of about 3 mm on the pipe wall, with a punching rate of 75%, wrap two to three layers with coarse chemical fiber materials, and bind them with plastic ropes.

[0020] The specific steps of the drainage and salt discharge method of salinized farmland:

[0021] 1. Digging trenches

[0022] Use an excavator to dig a ditch with a depth of 1.5 to 2.0 meters, a width of 30 cm at the bottom of the ditch, and a slope of 1:0.5. After the ditch is dug, the bottom of the ditch should be rested immediately, and the slope should be well controlled by leveling.

[0023] 2. Laying

[0024] Lay 40 cm wide plastic woven cloth at the bottom of the ditch to prevent gravel from mixing with mud, and lay 15 cm thick gravel on top, preferably with more coarse sand, and lay wrapped hidden pipes. The upper part is spread with 15-20 cm thick gravel, and then 40 cm wide plastic...

Embodiment 2

[0032] Adopt the drainage and salt discharge method of salinized farmland provided by the present invention, through the application in the paddy field, use the excavator to dig trenches, lay, and design the outlet of the hidden pipe and the distance between the hidden pipes, so as to detect the application effect of the present invention. For details, see Table 1.

[0033] It can be seen from Table 1 that when the rice began to be irrigated in May, the displacement of the two underground pipes gradually increased, while the salinity of the discharged groundwater gradually decreased. Start without water. The annual displacement of the 2-meter-deep underground pipe is 44267.1 cubic meters, and the salt discharge capacity is 214.1 tons. The annual displacement of the 1.5-meter-deep underground pipe is 20,689.5 cubic meters. Due to the low-lying terrain and high groundwater salinity, the annual salt discharge is 256.1 tons.

[0034] Generally, the salinity of farmland irrigatio...

Embodiment 3

[0036] Using the method for drainage and salt removal of salinized farmland provided by the invention, the effect of the method for drainage of underground pipes provided by the invention on reducing soil salinity is verified.

[0037] See Table 2. Through the monitoring and analysis of soil salt content at different levels (0-200cm) at 10, 20, 30, 40, and 50 meters on the east and west sides of the hidden pipe, it is found that drainage and salt discharge of the 2-meter-deep buried pipe have a great effect on reducing soil salinity. The obvious range of influence is about 30 meters to the east and 50 meters to the west of the hidden pipe. The 0-100cm soil salt content within 30 meters to the east of the hidden pipe decreased by an average of 21.8%, and the 0-200cm soil salt content decreased by an average of 38.1%; the 0-100cm soil salt content within 50 meters to the west of the dark pipe decreased by an average of 30.2%, 0 -200cm soil salt content decreased by 40.5% on aver...

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Abstract

The invention discloses a draining and salt-removing method for a newly-ploughed salinized farmland, comprising the following steps of: making a simple farmland concealed pipe by utilizing a building PVC (Poly Vinyl Chloride) sewer pipe, uniformly drilling holes with the diameter of 3mm on the wall of a 100mm plastic sewer pipe by the punching rate of 75 percent, coating two to three layers of crude chemical fiber outside the wall of the pipe, and strapping with plastic ropes; digging several rows of concealed pipe ditches in the newly-ploughed salinized farmland, wherein the depth of the concealed pipe ditches is 1.5-2.0m, the bottom width is 30cm and the specification of the side slope is 1:0.5; paving plastic weaved cloth with the width of 40cm at the bottoms of the ditches, paving sand gravel with the thickness of 15cm on the plastic weaved cloth, paving a coated concealed pipe, paving and spreading sand gravel with the thickness of 15-20cm at the surrounding and the upper part of the concealed pipe, paving the plastic weaved cloth with the width of 40cm on the sand gravel and refilling. The invention mainly solves the technical problem of draining by the concealed pipe in the newly-ploughed salinized farmland in aired regions and has a wide application value on the aspects of prevention and control of salinization and secondary salinizaiton of farmland in the dried regions, reformation and utilization of the farmland in the dried regions as well as prevention and control of desertification.

Description

field of invention [0001] The invention relates to the technical field of saline-alkali soil improvement, in particular to the technical field of underground pipe drainage and salt discharge in salinized farmland with a relatively large slope in arid areas. Background technique [0002] my country is a country with a wide distribution of saline-alkali soil, and the total amount of saline-alkali soil resources is about 9913×10 4 ha, about 920.99×104ha of cultivated land have different degrees of salinization, accounting for 6.62% of the national cultivated land area. Among them, Xinjiang is the province with the largest salinized soil area and the most types of salt composition in my country, and is known as the "World Saline-Alkali Soil Museum". The total area of ​​saline-alkali soil in Xinjiang accounts for 22% of the national saline-alkali soil area. Among the existing cultivated lands, the areas affected by different degrees of salinization accounted for 30% of the tota...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B77/00E02B11/00
Inventor 孟凤轩马兴旺迪力夏提伊里哈木罗新湖许咏梅刘骅王斌杨涛牛新湘李保国石建初盛建东左强
Owner INST OF SOIL & FERTILIZER XINJIANG ACAD OF AGRI SCI
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