METHOD OF EVALUATION OF EFFICIENCY OF RECLAMATION OF DISTURBED TUNDRA SOILS BY APPLICATION OF LOCAL PEAT AND POTASSIUM HUMATE

摘要

FIELD: agriculture.;SUBSTANCE: method comprises the sequential application of local peat and aqueous solution of potassium humate obtained from it in quantities that depend on the granulometric composition of the soil, and also planting and growing a mixture of grasses and cereals. At the first stage the enzyme dehydrogenase activity of undisturbed soil (control) is determined - sample №1 and that of local deposits of peat - the samples №2, №3 and №4 to select the peat samples with the maximum dehydrogenase activity. At the second stage, using the methods of experimental design, for example the method of saturated factorial design, a number of doses of peat and aqueous solution of 0.125% potassium humate, obtained from peat selected from the samples №2, №3 and №4, is selected and then at the third stage the samples of disturbed tundra soil are prepared with the application of peat - the batch of samples №5, as well as the disturbed tundra soil with subsequent application of peat and an aqueous solution of potassium humate - the batch of samples №6. The prepared batches of samples are inoculated with a mixture of grass and grain seeds and incubated for growing plants in both batches for 30 days in daylight under the controlled hydrothermal conditions (humidity 70% of full moisture capacity and the average monthly temperature natural for the study region). Then at the fourth stage the aboveground biomass of a mixture of grasses and cereals is determined in each sample of both batches №5 and №6. And the efficiency of the upcoming reclamation of the disturbed tundra soils is determined by exceeding of the above-ground biomass of the mixture of grasses and cereals of the sample batch №6 with respect to the above-ground biomass of the mixture of grasses and cereals of the sample batch №5. The optimum ratio of soil, peat and potassium humate for reclamation of specific tundra site is determined according to the results of mathematical processing corresponding to the selected method of experimental design, the test data obtained on the fourth stage - the sample batches №5 and №6.;EFFECT: method enables to restore rapidly soil fertility and to normalize the physiological processes in plants.;3 dwg, 1 tbl