Effect of different types of organic animal manure on growth of Catla catla and Physico-chemical and Biological parameters of pond water in out door ponds

Abstract

A study was carried out to evaluate the effects of using different types of organic manure on growth of Catla catla and the effect of water quality parameters, in outdoor ponds. Fishes weighing 0.32 ± 0.06 g were stocked at a density of four Fishes per m2 with a volume of 6, 4.60 m3. Effects of chicken manure and vermicompost on fish growth were investigated. The study was carried out for a period of 24 weeks. Non-fertilized ponds were used as controls. Physico-chemical and biological parameters such as temperature, pH, conductivity, dissolved Oxygen, biological Oxygen demand, primary productivity, salinity, alkalinity, nitrate, and phosphate concentration were investigated in chicken manure treated, vermicompost treated and non-fertilized ponds. A study was carried out to evaluate the effects of using different types of organic manure and water quality parameters on the growth of Catla catla in outdoor ponds. After 24 weeks growth of Catla catla in the chicken manure treated ponds was significantly higher than those in vermicompost treated ponds and non-fertilized ponds. Most of the water quality parameters did not show any difference except BOD, GPP and orthophosphate. Significantly higher amounts of chlorophyll “a”, BOD level, GPP and Phosphate concentration were recorded in ponds fertilized with chicken manure when compared with vermicompost treated ponds and non-fertilized ponds. But there was no significant difference of nitrate concentration among chicken manure treated ponds, vermicompost treated ponds and control ponds. Significantly higher numbers of zooplankton was recorded in ponds fertilized with the chicken manure. But there was no significant difference of zooplankton number in vermicompost treated ponds and non fertilized ponds. Organic matter loading was significantly high in chicken manure treated ponds and vermicompost treated ponds when compared to the non fertilized ponds. Mean comparison of physico-chemical parameters and Biological parameters were carried out by one-way ANOVA to compare each treatments.