SU1260440A1 - Amelioration system for soil desalination - Google Patents

Description

The invention relates to agriculture, in particular to the land reclamation of agricultural crops. it can be used, for example, in the cultivation of accompanying crops of rice crop rotation on saline lands with their simultaneous washing.

The purpose of the invention is to increase the efficiency of soil desalination, preserve the fertile soil layer during leaching and reduce the cost of desalinization.

FIG. 1 shows a reclamation system, a plan; in fig. 2 -: Section A-A in FIG. FIG. 3 - cut. BB in FIG. 1 (section across molehills).

The soil desalinization system includes irrigation 1 located parallel to each other and 2 discharge channels, the distance between which is 1.80–200 m. Open temporary drains 4 are made along the borders of the checks 3 across the indicated channels; depth 0.8–1.2 m. recesses of drains are laid in interfrag rollers 5. Temporary renals 4 are equipped with cedar structures 6 and 7 at their intersections with irrigation canal 1 and water outlet structures 8 and 9 at intersections with discharging canal 2. Mole drains 10 are made dead-end and connected to open at belt drains 4, alternately to the left or right. Depth of molehill initiation is 0.4–0.8 m, and the interval is 1-2 m.

Soil washing on the proposed system is carried out in the following order. First, from the irrigation canal: la 1 into one of the temporal drains 4, for example, the left one, fresh irrigation water is fed through the outlet 6. Its horizon in the drain 4 is supported at the level below the surface of the check by 5-10 cm. Thus it prevents water from reaching the surface of the check. Right.

temporary drainage at the opposite end of the check is empty, since the water supply) L-bunch 7 is closed. Fresh for some time (2-5 hours)

irrigation water from the left temporal drain 4 and mole drains 10, connected: with it, filtered in horizontal and vertical directions 11, and salt solution;

existing in the soil reaches the neighboring krotodren, connected to the right temporary drainage 4, drainage outflow from which is diverted into the discharge channel 2 through the open structure 9.

The horizon of water in the right temporal drainage 4, which receives saline-containing water, is maintained 3-12 cm below the mouths of mole drains 10. During leaching, curve 12 of depression

has a dome-shaped shape with a slope in the direction of molehills, providing water drainage.

The process of removing the active layer

The soils last for 5–7 days, after which they take a break of 5 – tOr days to reduce the level of groundwater and aerate the washed layer. In case of cultivation of concomitant crops.

on rice paddies, the duration of breaks between washes is regulated by irrigation periods, depending on the decrease in soil moisture by up to 70-80% of the lowest moisture capacity. Second

the washing stroke is characterized by the fact that the water supply is carried out into the right drain 4, and its left drain 4 is diverted to its iiepe3. A change in the direction of movement of the washing water is provided

by successive switching on and off of the outlets 6–9, located on temporary drains 4. The number of leaching depends on the amount and salt content of the soil. When watering crops of rice crop rotation, the number of washes also depends on the current moisture of the active soil layer.

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Compiled by E.Popova Edited M. Dylyn. Gehred A. Kravchuk

Order 5196/24 Edition 641 Subscription

VNIIPI USSR State Committee

.on matters of inventions and discoveries 113035, Moscow., Zh-35, 4/5 Raushsk nab.

Production and printing company, Uzhgorod, st. Project, 4

Proofreader M.Sharoshi

Claims (1)

Meliorative system for soil desalinization, containing horizontal checks, irrigation and discharge channels, open temporary drains with water outlets and mole drainage, characterized in that, in order to increase the efficiency of soil desalinization, preserve the fertile soil layer during leaching and reduce costs, by desalination ^! temporary drains distribution ¹ laid on opposite grani'tsam checks and provided with water discharge from buildings as the irrigation so minutes from the relief channel, and mole Drains performed deadlock and g connected to the temporary open ends alternately drains. SU .... 1260440 1260440 '1