Evaluation of the enzymatic activity of gray forest soil in organic and traditional agricultural landscapes of the Pre-Kama region of the Republic of Tatarstan.
DOI:
https://doi.org/10.24852/2411-7374.2022.3.35.43Keywords:
organic farming, urease, invertase, catalase, gray forest soils, integral assessmentAbstract
The article presents the results of a comparative assessment of the enzymatic activity of gray forest soils in organic and traditional farming, as well as comparative data of an integral assessment carried out on a set of agrochemical, physicochemical, agrophysical and biochemical indicators. It is shown that organic agriculture contributes to an increase in the content of humus, gross and alkaline hydrolysable nitrogen, as well as the overall activity of enzymes and the environmental sustainability of gray forest soils in the Pre-Kama region of the Republic of Tatarstan. The results of multivariate discriminant analysis indicate a statistically significant difference in the ecological state of gray forest soil under organic and traditional farming. According to the complex of agrochemical and physicochemical parameters, as well as biochemical parameters of general enzymatic activity, gray forest soils of organic agrocenoses are closest to the level of natural biocenoses. It has been established that according to the average indicators of enzymatic activity, gray forest soils of organic and traditional agrocenoses are moderately enriched in urease and invertase activity and poor in catalase activity. It is shown that the change in the total enzymatic activity of gray forest soils directly depends on their enrichment with alkaline hydrolysable nitrogen, total nitrogen, exchangeable potassium, mobile phosphorus, and humus. According to the degree of sensitivity to agrogenic impact, the enzymes of typical gray forest soils reliably form the following sequence: invertase activity > urease activity > catalase activity.
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