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¹ National University of Life and Environmental Sciences of Ukraine, Department of Aquaculture, 19 General Rodimtsev St., 03041 Kyiv, Ukraine
² Institute of Fisheries of the National Academy of Agrarian Sciences of Ukraine, 135 Obukhivska St., 03164 Kyiv, Ukraine DOI : 10.4194/1303-2712-v13_1_01 Viewed : 4214 - Downloaded : 3702 The paper contains results of studies on the application of the bacterial preparation Polymyxobacterin in pond aquaculture for optimization of mineral phosphorus content in water, development of natural forage base, and increase of fish productivity. It was found that in aquatic environment, there are optimal conditions for growth of Paenibacillus polymyxa KB bacterium. Polymyxobacterin application contributes to an increase of mineral phosphorus in pond water by 1.3-3.7 times compared to the control and does not exceed the normative values (less than 0.5 mgP/dm3) that in its turn stimulates phytoplankton vegetation and zooplankton development. After Polymyxobacterin application, due to development of natural forage organisms, fish productivity of nursery and fattening ponds exceeded the control variant by 3.9 and 6.3% for common carp; by 34.1 and 16.7% for silver carp; and by 5.5 and 9.6 for grass carp, respectively. Keywords : Polymyxobacterin, pond aquaculture, aquatic environment