Changes in physical and chemical indicators and catalase activity of leached chernozem in different fertilizer systems

Recently, the anthropogenic impact on ecosystems has been increasing. It leads to changes in the quantitative and qualitative composition of soils, in particular, to a decrease in their enzymatic activity. Enzymatic activity demonstrates the state of soil fertility and internal changes occurring after agricultural use and after an increase in the level of agriculture. These changes have been found both with the involvement of virgin and forest soils in the culture, and with various methods of using them. Therefore, the study of enzymatic activity on the example of catalase and its dependence on the basic physicochemical characteristics of the soil is an actual problem. Objects for analysis were samples of leached chernozem under sunchoke. The soil samples were provided by «Terralnvest», Dankovsky district, Lipetsk region. There was studied control, background - 20 tons per hectare of manure, a variant with the use of mineral fertilizers against the background of manure, and a variant with a calcium ameliorant defecate against the background of manure. pH values, content of exchange bases and humus, catalase activity were determined in the samples. There was revealed that the application of mineral fertilizers and ameliorant caused changes in the analyzed properties of the soil. The variant with the use of defecate against the background of manure was characterized by optimal indicators. It was found that the catalase activity of the soil samples was average. The application of manure in combination with the fertilizers and ameliorant increased the catalase activity of the soil by 1.3-1.5 times in comparison with the control. There was also found that the connection between catalase activity and humus content was strongly positive.

удобрения, мелиорант, топинамбур, каталаза, гумус, fertilizers, ameliorant, sunchoke, catalase, humus

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