Method of determining amount of change of power of peat layer on reclaimed land

FIELD: agriculture.

SUBSTANCE: method comprises the device of cuts, power measurement of layer of membranes of soil biological organisms in the beginning and end of the observation period and the calculation. At that the power of the packed layer of membranes of testate amoebas is measured. The amount of change in the power of peat layer is calculated by the formula Hsrab=a·h, where Hsrab is reduction value of the peat layer power, cm; h is the power of packed layer of membranes of testate amoebas, cm; a is a coefficient. The coefficient a is determined by the formula a=(H1-H2)/(h1-h2), where H2, H1 is the power of the peat layer and h2, h1 is power of the packed layer of membranes of testate amoebas, respectively at the end and the beginning of the observation period.

EFFECT: method enables to determine quickly and accurately the amount of change of power of the peat layer on reclaimed land.

1 ex

 

The present invention relates to the field of agriculture, and more specifically to methods to determine the amount of change of capacity of the peat layer on reclaimed lands. The change of the layer thickness of peat (peat) is an important environmental indicator of technologies for land reclamation and cultivation of crops.

There is a method of establishing the power of the peat layer, which includes the drilling, measuring the length of the drilled cores and calculation (Soil survey. - M.: Publishing house of the USSR Academy of Sciences. 1959, str).

A known method is used in flooded not reclaimed peatlands.

The way to determine the amount of change of capacity of the peat layer on reclaimed lands, including the device cuts power measurement layer membranes soil biological organisms at the end of the billing period and the calculation described in the patent of Russian Federation №2452950, published on 10.06.2012 in bull. No. 16.

The disadvantage of this method is limited functionality due to the availability of sufficient density of settlement of diatoms.

The aim of the invention is the extension of functionality.

The invention consists in that the way to determine the amount of change of capacity of the peat layer on reclaimed lands, including the device sections, and the intent of the layer thickness of the shells of soil biological organisms at the end and the beginning of the period of observation and calculation, this measures the capacity of the compacted layer of the shells of testate amoebae, and the change in capacity of the peat layer is calculated by the following formula Hthe operated=a·h, where Hthe operatedthe magnitude of the reduction capacity of the peat layer, cm; h - power compacted layer of shells of testate amoebae, cm; a - coefficient, and the coefficient a is determined by the formula a=(H1-H2)/(h1-h2), where N2H1- capacity of the peat layer and h2h1- power compacted layer of shells of testate amoebae, respectively at the end and the beginning of the observation period.

During operation of the reclaimed peatland surface part of the layer of peat is mineralized and disappears shells of diatoms, which were in the upper part, moved to the bottom of the peat layer, where you create a compacted layer. The capacity of the compacted layer of the shells of diatoms increases proportionately with the decrease of the peat layer. A single measurement at the end of the settlement period the capacity of the compacted layer of the shells of diatoms allows to calculate the change in capacity of the peat layer in the billing period. In the Northern regions (Northern taiga subzone) the density of settlement of diatoms insufficient for the formation of a compacted layer of shells, which complicates the application of f the th method.

In Northern regions the density of settlement testate amoebae sufficient to create a compacted layer of shells.

The essence of the proposed technical solutions explains the example.

Reclaimed floodplain peat supplied systematic horizontal drainage. The rotation zernotorgovaj. The operation period of 15 years. The project documentation was lost. The capacity of the peat layer in the initial period of operation is not known. Arrange the soil cut the entire depth of the peat layer. Measure the power of the compacted layer of the shells of testate amoebae h=1.0 cm and calculate the Hthe operated- the magnitude of the reduction capacity of the peat layer. Hthe operated=a·h=20·1.0=20 see

Values of the coefficient a is determined by the formula a=(H1-H2)/(h1-h2), where N2H1- capacity of the peat layer and h2h1- power compacted layer of shells of testate amoebae, respectively at the beginning and end of the observation period, see take This factor constant for all sections of the array drainage with homogeneous soil and drainage conditions. The observation period take 2-3 years. With the reduction of the period of observation decreases the accuracy of determination of the coefficient a. Arrange the soil section at the beginning of the observation period and at the end of it. Measure the capacity of the peat layer H2,=90.0 cm and H1=91.0 cm and power uplatnena the layer of shells of testate amoebae - h2=0.85 cm and h1=0.9 cm, respectively at the end and the beginning of the observation period. Then a=(91-90)/(0.9-0.85)=20.

The proposed method was tested in the Arkhangelsk region. Reclaimed riparian peatlands, provided systematic horizontal drainage with depth of 1.1 m, the Rotation Boscombe. The operation period of 25 years. Arrange the soil cut the entire depth of the peat layer. Measure the power of the compacted layer of the shells of testate amoebae h=1.7 cm and calculate the Hthe operated- the magnitude of the reduction capacity of the peat layer. Hthe operated=a·h=21·1.7=35.7 see the value of the coefficient is determined for a three-year period of observations a=(81-66 .3)/(1.2-1.13)=21. Peat layer thickness at the beginning of operation of the reclaimed peatlands under the proposed method is 81+35.7=116.7 see According to project documentation peat layer thickness at the beginning of operation of the reclaimed peatlands was 117 see the Accuracy of the proposed method is satisfactory.

When establishing the magnitude of the change of capacity of the peat layer 5 parts of one of the reclaimed array, you must spend 10 measurements by the method similar two at each site. Under the proposed method it is necessary to spend 7 measurements, one at each site and two for the determination of the coefficient a.

Thus, the proposed method to determine the amount of change m is snasti layer of peat on reclaimed lands extends the functionality of the analogue in areas with high density of settlement testate amoebae.

The way to determine the amount of change of capacity of the peat layer on reclaimed lands, including the device cuts power measurement layer membranes soil biological organisms at the end and the beginning of the period of observation and calculation, characterized in that the measured power of the compacted layer of the shells of testate amoebae, and the change in capacity of the peat layer is calculated by the following formula Hthe operated=a·h, where Hthe operatedthe magnitude of the reduction capacity of the peat layer, cm; h - power compacted layer of shells of testate amoebae, cm; a - coefficient, and the coefficient a is determined by the formula a=(H1-H2)/(h1-h2), where N2H1- capacity of the peat layer and h2h1- power compacted layer of shells of testate amoebae, respectively at the end and the beginning of the observation period.



 

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