THE IMPACT OF LOCAL WATERLOGGING ON THE NUMBER OF BACTERIA OF CALCIC CHERNOZEM OF THE ROSTOV REGION
The analysis of the local impact of waterlogging on the number of bacteria in the Chernozems that are exposed to excessive moisture, for example, Zernogradskiy district, Rostov region was carried out. It was obtained that waterlogging of the topsoil of calcic Chernozem leads to changes in their biological properties, especially the total number of bacteria. The slight difference in the numbers of bacteria between the automorphic and hydromorphic chernozems was discovered. The total number of bacteria in the whole profile decreased in hydromorphic Chernozem compared to the automorphic analogue. Also in the top 25 cm layer of moistened Chernozem the total bacterial abundance was almost two times lower than that of automorphic Chernozem at the same depth. When diagnosing waterlogged Chernozem, the abundance of Azotobacter bacteria is not recommended for use in connection with its low informative value.