SU709758A1 - Method of desalinization of irrigated soil - Google Patents

Description

one

The invention relates to the field of agriculture, in particular to land reclamation, and can be used in the development of medium and strongly saline soils for various agricultural crops.

There is a known method of desalinizing irrigated lands by rinsing them with water with the removal of the latter by constant deep and temporary shallow drains. The method is carried out by washing the soil with water in two stages 1.

There is a known method for the desalinization of irrigated lands, including the washing with water of saline areas planned for sowing one or another agricultural crop. Water from the flushed territory is discharged along permanent deep and temporary shallow drains. Temporary shallow drains are cut between permanent deep ones. Deep drains are placed at a distance of 200–250 m from each other, and shallow ones at a distance of 20–30 m 2. However, with the existing method of desalinizing irrigated lands, water-physical properties are deteriorating. soil, especially reduced their

filtration capacity and the uniformity of the desalination of the washed area is not always achieved. Therefore, leaching is carried out for a long time (1–3 years), a large amount of fresh water is consumed (12–30 thousand), and because of the irregularity of the area being washed, permanent useful area is lost.

The aim of the invention is to increase the filtration capacity of soils.

The goal is achieved using the proposed method of desalinization of irrigated lands with water drainage on the silt-mock net, which is

5 in the following.

In the area planned for development after the capital planning, slits are cut to a depth of 70–75 cm with an interval of 1 m and perpendicular to their direction to a depth of 75–85 cm of drainage mole in 1 m

20 apart. Thus, after plowing under the soil, a distinctive mesh is obtained. Then, preplant preparation is carried out and the intended culture is seeded.

Watering is carried out with increased doses at a humidity threshold in the meter layer not lower than 80% of the GVP.

Water not used by the plant dissolves salts and is discharged along the gaps and mole drains to the collector drains with a depth of 1.3-1.5 m along the boundary of the territory under development.

The proposed method from the start of implementation to sowing consists of the following operations: planning, cutting gaps, cutting mole drains, plowing to a depth of 27–30 cm, borovani, malovani, temporary collector device, temporary irrigator device,

Slotted-mole grid under the soil improves its filtration and contributes to the desalinization of the irrigated area during the period of cultivation of agricultural crops, which makes it possible to master the highly saline lands without special preliminary washes.

Example. Testing of the proposed method for the desalinization of irrigated lands on highly saline clay soils (total salt 0.9-1.7%) was carried out.

For comparison, a well-known method was used for desalinization of irrigated lands with diversion of water by temporary drones. After the capital planning of the site along the edges of the territory planned for the proposed method, collector drains with a depth of 0.9–1.0 m were cut. Due to the lack of a domestic drainage machine produced by the domestic industry, D-657 was mounted for making and dressing us

a device was used consisting of a knife stand with a welded mole of 65 mm in diameter mounted on the frame of the mounted ripper RN-80B and mounted on a tractor “S-100.

In the variant of the proposed method of desalination, the fissure was carried out parallel to the collector drains at a depth of 70 cm, and the mole was perpendicular to the slit to a depth of 75-80 cm with intervals in both cases 1 m. 116 mm, which was lowered into open collector drains to a depth of 75 - 80 cm. When the aggregate moved, the expander expanded the stroke of the mole, sealed its walls and formed moles-drains. At the same time, a gap-mole grid formed under the soil, which contributed to an increase in the filtration of clay soils, and filtration water with dissolved salts was diverted into open collecting drains.

In the variant with temporary shallow drainage (control), temporary shallow drains were cut by a canal-digger to a depth of 0.8 m after 20-30 m. The mouth of the temporal drains flowed into the collector drains.

Against the background of temporary drainage, washings were carried out on checks measuring 0.15–0.25 hectares, fenced with rollers 30–40 height and 60–80 cm at the base width. In addition, in part of the territory of the control variant, without preliminary washing the site were set to compare the same culture as in the proposed version. The data are tabulated.

Famous Flushing

flooding checks Note: accounting for biological on the vine.

Claims (2)

Washing the harvest of green mass is carried out. As can be seen from the table, the proposed method of desalinizing irrigated lands with water drainage through the sub-soil slit-mole grid has significant advantages compared with the control. The use of the proposed method of irrigation lands desalinization with water drainage through the subsurface silt-mole grid provides, in comparison with the existing methods, the following advantages: an increase in filtration capacity and an acceleration of the desalinization of irrigated soils; save fresh water by eliminating special washes; reduction of terms for development of saline lands (in the year of sowing); increase in usable area (due to the elimination of open drainage). The economic effect of using the invention is more than 300 rubles per hectare (in 1977 prices). Claim of the invention A method for desalinizing irrigated lands, including cutting drains and then washing the soil by supplying water to its surface, characterized in that Soils, mole drains are cut through 1 m to a depth of 80–85 cm and perpendicular to them, they cut gaps 70–75 cm deep with an interval of 1 m, and then wash the soil with water. Sources of information taken into account during the examination 1. USSR author's certificate No. 232144, cl. E 02 B 13/00, 1967. 2. Technical guidelines for the design of horizontal drainage of land. M., 1962 (prototype).