Method of recultivation of damaged soil

FIELD: agriculture.

SUBSTANCE: invention relates to the field of recultivation of damaged soil in conditions of the Far North and may be used when restoring the soil and vegetation layer disturbed by industrial and economic human activities. The method of recultivation of damaged soil is described, including introduction into the ground of bentonite clay, seeds of perennial grasses, fertilisers, humic compounds and binder, and the bentonite clay is inserted as part of the waste mud, followed by stirring the top layer of soil. Then the fertiliser, humic compounds and seeds of perennial grasses are inserted, and then a binder is inserted, which is used as a solution of xanthan gum.

EFFECT: invention provides a more efficient process of recultivation, expansion of the scope of application on the surface of soils with different steepness.

2 ex

 

The invention relates to the reclamation of disturbed lands in the Far North and can be used for restoration of soil and vegetation disturbed by the production-economic activity of the person.

Features reclamation of disturbed lands in the Far North due to the presence of permafrost, which if damaged vegetation layer and, as a consequence, violations of the insulating properties of the upper soil layer leads to an increase in the depth of seasonal thawing, which contributes to the development of erosion processes. The development of these processes ultimately lead to irreversible soil degradation. Methods of soil reclamation, providing for the making of organic compounds in the form of peat and organic compost, which is unsuitable because of the need to deliver them in large quantities.

Known methods of reclamation of sandy soils using waste drilling mud and bentonite clay, forming part of the drilling fluids. Waste drilling fluids have a high content of mobile potassium, phosphorus and trace elements and can be used as a source of minerals for plant nutrition.

A known method for processing drill cuttings (RF patent No. 2298567, C08J 11/00, publ. 2007.05.10), which is pererabotka cuttings carried by mixing with the additive, which use pre-crushed urea foam in an amount of 5÷20% by weight of drill cuttings. The resulting material is used for remediation of contaminated land and water. The disadvantage of this method is the possibility of leaching of foam from cuttings under the influence of rain and pollution urea foam.

Known ruminatively improver, method thereof and method of reclamation of disturbed soils and land use (patent RF №2215769, SC 17/40, publ. 2003.11.10). In the known method in disturbed soils contribute ruminatively improver derived from waste drilling fluids by adding humananimalsex concentrate containing humic acid. The invention allows for better use of waste drilling fluids, their detoxification and restoration of soil fertility. However, such improver cannot be used for reclamation of slopes of roads, borrow pits, ravines, since it is poorly retained on the parent soil is washed away by the flow of rain and winds up to the moment when formed root system of inoculated for fixing ground herbs.

The closest analogue to the proposed method is a way to protect the soil from erosion (U.S. Pat the NT of the Russian Federation No. 2267514, SC 17/40, publ. 2006.01.10). The method involves preparation of an aqueous solution of polyvinyl alcohol and applying it to the surface of the soil. In the ground pre-make vlagoobmen, which is used as the powder bentonite clay. Additionally, in the surface layer of the soil contribute perennial grasses seeds, fertilizer and humus in the form of powder mixed with the bentonite clay. The invention improves the reliability and extend the time of implementation of the method. The disadvantage of this method is used as a binder of the upper soil layer of polyvinyl alcohol. Polyvinyl alcohol forms on the surface of the polymer film, which hinders the germination of seeds of perennial grasses, as evidenced by the very high rates of herbs to 1 m2described in example 3 known inventions, while the normal seeding rate of herbs is 10÷15 g per 1 m2. In addition, the polymer film impedes gas exchange in the roots of plants and the indigenous microflora, resulting in a slowing of root formation and, as a consequence, plant growth, which reduces the effectiveness of this method. In addition, the preparation of a solution of polyvinyl alcohol is carried out with heated above 50°C, which complicates remediation technology.

The challenge which sent before ageme the invention, is the development of an effective method of biological recultivation of disturbed lands in the Far North.

The technical result achieved by the invention is to increase the efficiency of the reclamation process, extending the scope of application of the method on the surface of soils with different steepness.

To achieve the technical result in the proposed method, including the introduction into the soil bentonite clay, seeds of perennial grasses, fertilizers, humic compounds and binder, bentonite clay make the composition of spent drilling mud, followed by mixing of the upper soil layer. Then make fertilizer, humic compounds and seeds of perennial grasses, and then make a binding substance, which is used as the solution of xanthan resin.

The advantage of the proposed method is used for the formation of fertile layer of soil waste drilling mud, which includes bentonite clay, which simultaneously solves the problem of disposal of waste drilling mud. Using the proposed method as a binder xanthan resin having a high viscosity at low concentrations, allows you to apply the proposed method on the surface of grunts different steepness, and to reduce the rate of seeding of perennial grasses in 2-4 times, and the specific rate of application of binder. Xanthan gum is a natural polysaccharide, a product of bacterial activity, it has excellent adhesive properties, and these properties are preserved for several cycles of freezing and thawing, which is very important in the Far North. In addition, xanthan gum is a food source for soil microorganisms, which in turn Admira turns into humus that contributes to the development of the fertile layer of the soil and reduces the consumption of fertilizers. Xanthan gum is used in the preparation of solutions for the conservation of the wells, which ensures a constant presence on the field.

Below are examples of implementation of the invention.

Example 1. On rekultiviruemye the plot is flat land make waste drilling mud at the rate of 0,5÷1,5 (m3solution at 100 m2of the earth). The surface layer of soil mix to a depth of 5÷7 cm, mineral fertilizers at the rate of 2 kg per 100 m2, humic compounds in the form of sodium HUMATE based 600÷1000 (ml per 100 m2and seeds of perennial grasses local climate zone at the rate of 1.5 kg per 100 m2. Then the plot happen even earlier and watered (0,2÷0,3)% of water is a solution of xanthan resin at the rate of 400÷600 (l of solution per 100 m 2).

Example 2. On rekultiviruemye plot of sloping land, such as slope career or osypnoi road, make a waste drilling mud based 1,0÷2,0 (m3solution at 100 m2of the earth). The surface layer of soil mix to a depth of 5÷7 cm, mineral fertilizers at the rate of 2 kg per 100 m2, humic compounds in the form of sodium HUMATE based 600÷1000 (ml per 100 m2and seeds of perennial grasses local climate zone at the rate of 1.5 kg per 100 m2. Then the plot happen even earlier and watered (0,3÷0,5)% aqueous solution of xanthan resin at the rate of 400÷600 (l of solution per 100 m2).

The soil on the proposed method of waste drilling mud, which includes bentonite clay, mineral fertilizers, humic compounds and xanthan resin provides obtaining topsoil saturated organic-mineral complexes, which promote intensive development of the root system of perennial grasses and restoration of disturbed lands. The invention also allows for the reclamation of disturbed lands, as gently sloping areas, and the consolidation of slopes, within one season.

Thus, the present invention improves the efficiency of the reclamation process by reducing the norm of seeding megale them herbs and consumption of fertilizers, extending the scope of application of the method on the surface of soils with different steepness.

Method of reclamation of disturbed lands, including the introduction into the soil bentonite clay, seeds of perennial grasses, fertilizers, humic compounds and a binder, characterized in that the bentonite clay in the soil contribute to the composition of the waste drilling mud, followed by stirring of the upper soil layer, then make fertilizer, humic compounds and seeds of perennial grasses, and then make a binder, and the binder substance use xanthan solution of the resin.



 

Same patents:

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EFFECT: increased bioproductivity of soils and protection of recultivated soils against wind erosion.

1 cl, 2 tbl

FIELD: chemistry.

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51 cl, 15 dwg, 3 tbl, 11 ex

FIELD: agriculture, in particular improvement of soil physical, biological and agronomic characteristics.

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9 tbl

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FIELD: agriculture.

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FIELD: agriculture.

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1 tbl, 2 ex

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1 tbl, 1 ex

FIELD: agriculture.

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3 cl, 1 dwg, 2 tbl, 1 ex

FIELD: agricultural engineering.

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FIELD: agriculture, grasscropping.

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EFFECT: increase in productivity of feed mass and useful life of developed grass lands.

1 dwg, 1 tbl

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agriculture and reclamation. The method includes removal of segregated wastes outside the residential area and their stacking. At the same time initially a layer of segregated domestic wastes is formed on the surface of marsh lands. Then a layer of wood ashes is formed on the surface of the wastes layer with height of 0.2-1.0 cm, and then the third layer is applied from fertile land with capacity of 5-15 cm, where grasses are sown with high generative productivity, for instance, leguminous plants - yellow sweet clover, Hungarian sainfoin, which assist in saturation of wastes and soil with nitrogen and reduction of marsh lands acidity.

EFFECT: method makes it possible to improve marsh lands with simultaneous usage of marsh lands.

3 dwg, 1 ex

FIELD: environment protection.

SUBSTANCE: method involves mechanical removal of excessive contaminants from surface and reducing toxicity of contaminated soil; sowing green manure crops and perennial grasses; preliminarily removing taking soil samples from contaminated surface and separating native contaminant destructors therefrom; after mechanical removal of contaminant from soil surface, providing sequential treatment of plot soil with water-soluble humates and at least double treatment with native contaminant destructors; mellowing soil; applying lime with mineral fertilizers such as saltpeter, double superphosphate and calcium chloride. Green manure crops are sown after application of fertilizers. Method further involves grinding green manure crops, plowing into soil and covering with soil by means of covering roll.

EFFECT: increased efficiency, reliable ecologically clean restoration of soil after contamination thereof.

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