تأثير إحلال كيك بذور القطن بديلا عن كسبة فول الصويا في علائق أسماك الكارب الشائع Cyprinus carpio L. : تجربة التغذية في الأحواض الزجاجية 1.

الملخص EN

This investigation was carried out to utilize cottonseed cake in formulating diets for common carp Cyprinus carpio L.

fish in an attempt to substitute for soybean meal.

Cottonseed cake was treated with multi enzyme (Avizyme) and autoclaving.

A 105 fish carp with average weight (26 ±2 gm/fish) of had been distributed randomly at seven experimental diets, with three replicates replication for each diet.

The fish fed for 70 days on experimental diets which contained different rates of cottonseed cake; zero% (control diet, diet 1) and three diets contained 25%, 32.5% and 41% of cottonseed cake of the total diet (2,3 and 4) respectively instead of 50 % ,66.66 % and 83.33 % of soybean meal a long with added multi enzymes while the last three diets contained 25%, 32.5% and 41% respectively treated cottonseed cake with (5, 6 and 7) autoclave respectively .

The Statistical analysis of results showed there were no significant differences in the weight gain, growth rate and relative growth rate among control diet, The best values for food conversion ratio and food efficiency ratio were recorded for fish which fed on diet 5.

There were no significant differences ( p> 0.01) among fish that fed at different experimental diets for protein efficiency ratio except for fish fed on diet 5 .The precipitate protein for fish fed at diet 2 and 5 were exceeded as compared with fish fed at diet 1 and the character of the protein productive values (PPV) were 23.16, 29.44 and 29.47% for the above mention three diets respectively.

The chemical analysis of body composition were performed ( crude protein, ether extract, ash ) for fish fed on experimental 4 diets .It can be concluded that replacing 83.33% of treated cottonseed cake by either Avizyme or autoclaving is possible in formulation in common carp diets as adverse effect on the studied growth faster for fish wasn’t evident .