SU1120930A1 - Method of land reclamation of salined soils - Google Patents

Abstract

1. METHOD OF REALIZATION OF SALTED SOILS, including the construction of an irrigation and drainage network, mechanical tillage and washing it with water, characterized in that, in order to accelerate the desalinization process, a closed-type irrigation and drainage network, which is constructed under a sub-horizon horizon, is used to loosen saline and sunflower horizons, and washing the soil is carried out from the bottom up by supplying water to the irrigation and drainage network under pressure. 2. A method according to claim 1, characterized in that the pressure of the water provides a washing filtration rate of 0.5-1.0 cm / day.

Description

with oo

The invention relates to agriculture, in particular to amelioration, and can be used for washing saline soils.

There is a method of soil reclamation, which includes the introduction of gypsum onto the soil surface and its subsequent mechanical mixing with the soil under a layer of water, which is dumped after 2-3 days 1.

The disadvantage of this method is the dissolution of a significant amount of mineral elements of the soil itself and fertilizers and their subsequent discharge with washing water, which leads to the depletion of the soil.

There is also known a method for amelioration of saline soils, including the construction of an irrigation and drainage network, mechanical tillage and washing it with water, which uses a deep splash to move the subsalt horizon containing calcium salts to the arable layer 2.

The disadvantage of this method is the extraction of non-fertile saline soil layers to the surface.

The purpose of the invention is to accelerate the process of soil desalinization.

This goal is achieved by the fact that according to the method of reclamation of saline soils, a closed-type irrigation and drainage network is used, which is constructed under the subsalt-horizon horizon, loosening the alkaline and sunflower-horizon horizons is carried out, head pressure.

In this case, the water pressure provides the rate of washing filtration of 0.5-1.0 cm / day.

An example of the method. Under laboratory conditions, cylinders 25 cm in height and 4.9 cm in diameter are filled with soil in layers in accordance with the morphological structure of the profile of alkaline soils. Bulk density is 1.3 g / cm. The sodic horizon is loosened and further flushing is performed.

5 soil water flow from the bottom up under the gypsum horizon. The speed of the ascending filtration during the experiment is 0.50-0.88 cm / day. The total consumption of water is 10,000 mh / ha. At 10, 23, 33, and 50 days, the salinity of irrigation water is determined and

® filtrate. During the period of the experiment at the control (prototype method), salts were washed 2.3 times less than in the experimental version. At the same time, the bulk of the salts in the control was taken out for 30-50 days, in the experimental variant - for 10-20 days. When carrying out the reclamation in the experimental variant, the soil was disintegrated more strongly than in the control.

The use of the proposed method of reclamation of saline soils makes it possible to efficiently use the washing water, to accelerate the process of soil desalinization.

Claims (2)

1. METHOD OF SALINATED SOIL RECYCLING, including the construction of an irrigation and drainage network, mechanical treatment of the soil and washing it with water, characterized in that, in order to accelerate the desalinization process, a closed type irrigation and drainage network is used, which is built under a subsolonetz horizon, and the alkaline soil is loosened. and subsolonets horizons, and soil washing is carried out from the bottom up by supplying water to the irrigation and drainage network under pressure. 2. The method according to π. 1, characterized in that the pressure of the water provides a washing filtration rate of 0.5-1.0 cm / day.