%0 Journal Article
%T THE EFFECT OF CHEMICAL AND ORGANIC FERTILIZATION ON PHYTOPLANKTON AND FISH PRODUCTION IN CARP (CYPRINIDAE) POLYCULTURE SYSTEM
%A Ponce-Palafox JT
%A Arredondo-Figueroa JL
%A Castillo-Vargasmachuca SG
%A Rodr¨ªguez Ch¨¢vez G
%J Revista Bio Ciencias
%D 2010
%I Universidad Aut¨®noma de Nayarit
%X This study reports the effects of sheep and pig liquid manure, and chemical fertilizer on the phytoplankton, primary productivity and aquaculture production in the cultivation of carp in semi-rustic ponds. The total yield was 4.632 kg in two hectares. Treatment with chemical fertilizers was found to present the highest yield with 10.06 ¡À 0.67 (kg/Ha/day), followed by treatment with pig manure (8.27 ¡À 1.24 kg/Ha/day) and sheep manure (6.33 ¡À 1.95 kg/Ha/day). It was also found that concentrations of phytoplankton were significantly (p <0.05) higher in ponds fertilized with sheep and pig manure (945.940 and 1,157,706 cells/ml, respectively) than in ponds where chemical fertilizer was used (744.560 cells/ml). In general, conditions were adequate to obtain high yields without commercial feed, thus organic fertilizer application can be recommended because of its availability and low cost.
%K polyculture
%K fertilization
%K manure
%K water quality
%K carp
%U http://biociencias.uan.edu.mx/publicaciones/01-01/4.pdf