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Využití krmiv se sníženým zatížením vodního prostředí fosforem v chovu kapra obecného (Cyprinus carpio L.)
 Zugárková, Iveta
Feeding plant-based feed in fish farming is one of the causes for increased phosphorus loading in water environment and consequent eutrophication of water. Phosphorus contained in plant components is deposited in the form of phytic acid, which is poorly digestible for cyprinids. The aim of this work was to monitor the influence of feeds with low phytate phosphorus content or the addition of enzyme for increasing the utilization of phosphorus on the production parameters and the fish exterior. In the first feed test, varieties of wheat Vánek and of barley Bojos were used for control groups. Lpa mutant lines of wheat JS-12/IDO 563 and of barley M955 were used for experimental diets. The feed test was conducted for 64 days in two repetitions. No statistically significant change occurred in the production parameters. In case of lpa barley a slight decrease in Fc occurred. In the second feed test, a feed mixture KP1 was used for the control group. Enzymatic phytase The Phyzyme XP 10.000 TPT was used in experimental diets. To feed mixtures F500 and F1000 was added only enzyme and to feed mixtures F500C3 and F1000C3 beside enzyme citric acid was added. The test lasted 72 days in two repetitions. Significant statistical difference in production parameters was recorded. FCR decreased in the groups F500C3 and F1000C3, whereas SGR increased in these groups. In groups F500C3 and F1000C3, the total length and body length also increased. According to the results, it can be concluded that lpa cereals have no effect on the reared fish. The use of the combination of phytase and citric acid has a positive influence on the production parameters without negative effects on the other parameters evaluated.
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