Use of the phosphate-solubilizing bacterial preparation Polymyxobacterin in pond aquaculture

Özet

This 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 increasing of fish productivity. It was found that there are optimal conditions for growth of Paenibacillus polymyxa KB bacterium in aquatic environment. Polymyxobacterin application contributes to an increase in 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.