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Effects of the use of feeds containing phytase enzyme from different protein sources on nitrogen and phosphorus discharge of rainbow trout (Oncorhynchus mykiss) juveniles | ||
| Iranian Journal of Fisheries Sciences | ||
| مقاله 119، دوره 19، شماره 4، مهر 2020، صفحه 2089-2105 اصل مقاله (412.76 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22092/ijfs.2019.118085 | ||
| نویسندگان | ||
| Orhan DEMİR* 1؛ A Yilayaz2 | ||
| 1Isparta University of Applied Sciences, Faculty of Eğirdir Fisheries, Aquaculture Department, Isparta, Turkey | ||
| 2Ministry of Food, Agriculture and Livestock, Mediterranean Fisheries Research Institute, Antalya, Turkey | ||
| چکیده | ||
| In this study, the effects of diets (D1-3) including fish meal (FM), hazelnut meal (HM), soybean meal (SM), and phytase enzyme [- (0),+(1000 FTU)] in varying rates (D1-, D1+; D2-, D2+; D3-, D3+) were examined on nitrogen and phosphorus discharge based on the nutrition of rainbow trout (Oncorhynchus mykiss) juveniles. The study was conducted in tanks with 3 replicates for each group. In this trial, it was found that the differences among total-particle nitrogen, particle phosphorus, and total solid waste values released from the rainbow trout groups were insignificant; however, the differences between the values of total-dissolved phosphorus and dissolved nitrogen released were found significant (p <0.05).The interactions among the factors were determined as insignificant (p >0.05). Moreover, although there were increases in the total and dissolved phosphorus and dissolved nitrogen discharge in all groups fed with diets including phytase, the particle phosphorus discharge decreased (p <0.05). Based on the decrease in the amounts of hazelnut meal and soybean meal used in the diets, it was determined that there was a decrease in the amount of dissolved phosphorus released to the environment; besides, it was determined that it led to an increase in the amount of released dissolved phosphorus in all groups fed with diets containing phytase enzyme (p <0.05). | ||
| کلیدواژهها | ||
| Diets protein؛ Waste؛ Dissolve؛ Enzyme؛ Fish | ||
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