Method of desalinisation of heavy saline lands

FIELD: agriculture.

SUBSTANCE: for desalination of heavy saline lands, water is supplied to the desalinisation site, the slits 3 are cut, the irrigation pipes 6 with droppers 7 are placed along the central axis of the inter-slit bands, the inter-slit bands are covered with waterproof screens. Then the wash water is fed through the droppers 7, the soil with salt is moved from the walls of the slits 3 at their bottom after the termination of washing, and the slits 3 are poured. Before cutting the slits 3 the deep loosening 2 is carried out. The slits 3 are cut with a bias of the bottom towards the collector and matched with it. Along the central axis of the inter-slit bands the troughs 5 are formed by compacting, in which the pipes 6 with droppers 7 are placed. After moving to the bottom of the slits 3 of soil with salt they are poured first with gravel as the layer of 0.2-0.3 m, then with sand of the field surface. Then, the site surface is levelled and ploughing is carried out with the formation of the arable layer.

EFFECT: increased efficiency of desalination of heavy saline lands with minimal cost of water, diversion of excess precipitation with removal of salts beyond the desalinisation site.

3 dwg

 

The present invention relates to the field of agriculture and will be used for restoring fertility of heavy saline land.

A characteristic feature of these lands are heavy granulometric composition and high degree of saturation of the soil toxic salt ions that have a dampening effect on plants. In addition, these lands have low permeability and in a moist condition is difficult passable for agricultural machinery, which does not allow to cultivate agricultural crops.

The known method of leaching of heavy saline land through reclamation system. This method includes a bookmark deep subsurface drainage, cutting power and drainage network and system of cracks. In the washing process to the area supplying water to completely fill the cracks and washed with a layer of soil, then water with dissolved salts removed in subsurface drainage (Ed. St. USSR №1358848, IPC A01G 25/00, 1987, BI No. 46).

The disadvantage of this method is the cost of large amounts of water (15-20 thousand m3/ha).

The closest present invention is a method of desalinization of the soil, including supply to assalaamu water phase, cutting cracks, formation of ridges, placing them on the pipes with droppers, shelter of mishelevka prostranstvennom, the source of water, the offset from the walls of the crevices of the soil with salt after washing to the bottom of the slit, forming above it waterproof screen and filling the cracks with soil (Patent RF №2273693, IPC EV 13/00, 10/04, 2006). Application of this method allows more than halve the cost of water to rinse.

The disadvantages of this method are the lack of efficiency of desalting heavy lands due to the low filtration rate and the risk of secondary salinization in the gradual destruction of the waterproof layer over the buried salts.

To eliminate the mentioned disadvantages allows the proposed method for the desalting of heavy saline land, including the water supply to rasaleela the plot, cutting slots, the placement along the Central axis of mislevy bands irrigation pipes with droppers, the shelter of mislevy strips waterproof screens, the flow of wash water through a dropper, moving soil with salt from the walls of the slits on the bottom after the termination of the flushing and filling of cracks, which according to the invention on rasaleela the area before cutting slits produce deep ripping, slits cut into the slope of the bottom toward the manifold and match with him, along the Central axis of mislevy bands formed by sealing the hollow which is placed the irrigation drobopro�dy with droppers, and after you move to the bottom of the crevices of the soil they are covered with salt first gravel layer 0.2-0.3 m, then sand until the surface of the field, after which the ground is level and produce plowing with the formation of the plow layer.

New positive result from the application of the proposed method consists in loosening the soil increases its permeability, compaction of excavations for laying pipelines with droppers provides for the formation of capillary movement of moisture by capillary pores with salt on the walls of the cracks. Slot filling gravel eliminates capillary rise of salts to the surface. However, the gravel and sand layers provide abstraction to the collector of precipitation, which are dissolved and carried the buried salt from the bottom of the cracks, preventing the wetting layer of washed soil and significantly reduces the risk of secondary salinization.

The invention is illustrated by drawings, where Fig.1 is a perspective view Rossolimo plot in plan, Fig.2 - cut slits in the washing process, Fig.3 - section cracks after completion of the work.

The proposed method for the desalting of heavy saline soils is as follows.

On rasaleela site 1 produces deep loosening of soil, forming a loosened layer 2. Then produce cutting slits 3 on HL�Bina 1.5-2.0 m over the distance of 2-3 m and match them with the collector 4. The bottom of the slit 3 has a slope toward the reservoir 4. Along the Central axis of mislevy seal strips form a trough 5, the bottom of which lay irrigation pipes 6 with droppers 7 connected to the inlet line 8. The surface of mishelevka space served by the watertight screen 9, the edges of which are fastened along the edges of the slits 3.

After completing installation of the system to produce the water supply to assalaamu section 1 of the power conduit 8 on the irrigation pipeline 6 through a drip 7. Water enters the compacted surface of the trough 5 and together with dissolved salts is transferred by capillary pores in the direction of the greatest evaporation, namely the walls of the slits 3. Simultaneously, the moisture evaporates under the screen 9, is condensed on its inner surface and flowing down to the bottom of the trough 5, is involved in the process of moving salts on the walls of the slits 3. Upon completion of the flushing water flow is stopped, the screens 9 and the piping 6 with droppers 7 is removed from the surface of the area 1. Salt deposited on the walls of the slits 3, move to the bottom, forming a layer 10. On top of this layer poured the gravel layer 11 with a thickness of 0.2-0.3 m, sufficient to rupture of capillaries, and the sand layer 12 to the top of the slits 3. Then, on the site make leveling and plowing with the formation cassolnovo plow layer.

Izbat�to precipitation, the drop during the growing season and in autumn-winter period, percolates through the sandy layer 12, gravel 11 and flows along the bottom of the slots 3 in the collector 4, and from there into the receiving water. During the movement of this water dissolves salts in the layer 10 and disposing of them off-site 1.

Thus, the proposed method enhances the efficiency of desalting heavy saline land with minimum amounts of water, disposal of excess precipitation to remove salts outside Rossolimo plot.

Method of desalting of heavy saline soils, including water supply for rasaleela the plot, cutting slots, the placement along the Central axis of mislevy bands irrigation pipes with droppers, the shelter of mislevy strips waterproof screens, the flow of wash water through a dropper, moving soil with salt from the walls of the slits on the bottom after the termination of the flushing and filling of cracks, characterized in that rasaleela the area before cutting slits produce deep ripping, slits cut into the slope of the bottom toward the manifold and match with him, along the Central axis of mislevy bands formed by sealing the hollow in which are laid irrigation pipes with droppers, and after you move to the bottom of the crevices of the soil they are covered with salt first gravel layer 0.2-0.3 m, then sand until the surface of the p�La, then the ground is level and produce plowing with the formation of topsoil.



 

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1 tbl, 1 ex

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2 cl, 7 tbl, 1 ex

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1 tbl, 2 ex

FIELD: agriculture.

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7 cl, 2 dwg

FIELD: agriculture.

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6 cl, 3 dwg, 2 ex

FIELD: chemistry.

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8 cl, 11 dwg, 8 tbl

FIELD: agriculture.

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FIELD: oil and gas industry.

SUBSTANCE: for biorecycling of oil sludge and oil production and processing waste by means of soil populating with natural black-soil-forming organisms a mixture is prepared with an initial composition of 26-30% of oil sludge, 26-30% of liquid oil sludge and the remaining part of organic domestic waste and/or saw dust, the mixture is infused within 20-24 hours at a temperature of 20-25°C for further populating with earthworms of the first generation, the mixture is withhold within 17-30 days till the earthworms of the second and third generations appear for the purpose of the sludge-contaminated soil treatment. The earthworms of the second and third generations grown in a hothouse conditions by adaption of the earthworms of the first generation to the above mixture are introduced to the contaminated soil. At that introduction of the earthworms of the second and third generations is made at a volume ratio of soil and the mixture equal to 10-15:1.

EFFECT: improving efficiency of the contaminated soils treatment.

4 cl

FIELD: agriculture.

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EFFECT: method enables to increase the intensity and to reduce the time of formation of a strong root system of grass lawn cover, to reduce the recovery times of the lawns.

1 ex

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