Document Type : scientific research article
Authors
1
Ph.D. Student, Department of Fisheries and animal science, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran
2
Corresponding Author, Professor, Department of Fisheries and animal science, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran
3
Professor, Department of Fisheries and animal science, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran
4
Associate Professor, Department of Fisheries and animal science, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran
Abstract
The purpose of this research is to investigate the different percentages of combo enzyme in diets containing different amounts of soy and its effects on the growth, immune and liver enzyme of blood and the chemical composition of salmon fry carcass. This experiment, which included 8 treatments and 3 repetitions, and for each repetition, 16 pieces of fish were distributed in each tank. From 8 experimental diets including treatment one: 22.5 (percent) + zero (percent) enzyme replacement; Treatment two: replacement of 22.5 + 1 g of enzyme; Treatment 3: replacing 22.5 + 1.5 g of enzyme; Treatment four: replacing 22.5 + 2 g of enzyme; Treatment five: replacement of 45 + zero enzymes; Sixth treatment: replacement of 45 + 1 g of enzyme; Seventh treatment: replacement of 1.5 + 45 g of enzyme and eight treatment: replacement of 45 + 2 g of multienzyme were used. Carcass chemical composition, liver enzymes, blood serum immune factors of rainbow trout were done. The parameters of final weight, final length, body weight gain, body length gain, percentage of body weight gain and daily weight gain in treatment four showed the highest value compared to other treatments significantly (P < 0.05). The amount of carcass protein in treatments four and seven showed the highest amount compared to other treatments (P < 0.05). The highest amount of complement activity in treatment four (with 155.61 mg/dl) was significantly observed. (P < 0.05). The highest activity of ALT enzyme was observed in treatment three, ALP enzyme in treatment four, and LDH enzyme in treatment one (P<0.05).
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