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Swine Nutrition and Feed Technology
Asian-Australasian Journal of Animal Sciences 1995;8(6): 587-594.
DOI: https://doi.org/10.5713/ajas.1995.587    Published online December 1, 1995.
Effects of dietary full-fat soybean levels on growth performance and feed utilization and phosphorus excretion of carp (Cyprinus carpio)
J. D. Kim, K. S. Kim, J. S. Song, Y. B. Woo, K. S. Jeong, T. H. Won
In order to estimate the nutritive value of roasted full-fat soybean(FFS) in carp diet, growth performance and excretion of protein and phosphorus were examined using carps having mean body weight of 111 g. Growth trial was conducted for 4 weeks using the fishes fed 5 diets(Control, F24S13, F16S27, F8S40 and F0S56) containing 32%, 24%, 16%, 8% and 0% of fish meal (F) and 0%, 13%, 27%, 40% and 56% of full-fat soybean, respectively. A total of 800 fishes were allotted randomly by groups of 40 to 5 treatments with 4 replicates per treatment. Fishes were fed to station eight times daily. Feeding trial was conducted for 4 weeks. As dietary FFS increased from 0% to 56%, weight gain of fish decreased from 91 g to 39 g and feed conversion ratio increased from 1.06 to 1.95. Protein efficiency ratio(PER) was highest(2.35) in control group which had the highest protein intake, while PER significantly decreased with decrease in protein intake as dietary FFS level increased. Although dietary protein and evergy levels were maintained constant, protein excretion per kg weight gain varied from 273 g to 579 g for the groups control and F0S56, respectively. However, the value for control group was not significantly different to those for the groups F24S13 and F16S27. On the other hand, the highest protein retention efficiency was found in group fed the diet F24S13. Fish fed the diet F8S40 excreted the lowest phosphorus(P) based on kg weight gain showing the highest P retention efficiency of 62%. P excretion per kg feed intake was in the range of 5 g to 10 g for the groups F8S40 and F24S13, respectively. The present results indicated that as dietary FFS level increased, growth performance and feed utilization decreased while excretion of protein and phosphorus increased. Therefore, it was concluded that more than 25% substitution by FFS for fish meal could exert negative effects on growth and feed utilization of carp.
Keywords: Full-fat soybean; Fish meal; Carp; Growth; PER; Phosphorus excretion

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