Published in Scientific Papers. Series D. Animal Science, Vol. LXVIII, Issue 2
Written by Nicoleta Georgeta DOBROTĂ, Gheorghe DOBROTĂ, Mioara COSTACHE, Silvia RADU, Nino MARICA
Organic fertilizers, through their ability to decompose and release carbon dioxide, ammonia, nitrogen, phosphorus and other nutrients, contribute to the proliferation of phytoplankton and therefore to the amplification of the trophic base in the pond. The need for phosphorus and nitrogen was ensured by fertilization with chemical fertilizers (ammonium nitrate and superphosphate). The paper presents the results of research on the rational use of fertilizers in first summer rearing ponds stocked with carp larvae Cyprinus carpio (Linnaeus, 1758). The experiments were carried out in the rearing ponds located in the South-West region of Dâmbovița County, at the Research and Development Station for Fisheries Nucet, in 3 experimental variants. The distribution of organic and chemical fertilizers in ponds with low nitrogen (below 2 mg N L-1) and phosphorus (below 0.5 mg P L-1) content, determined an abundant development of phytoplankton and a qualitative improvement of zooplankton and benthos, which constitute a food source for carp in the first year of growth.
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