Digestibility of crude protein and fat from feed rations for minks with different proportions of bowine liver
2001
Mertin, D. | Suvegova, K. | Flak, P. | Ceresnakova, Z. (Vyskumny Ustav Zivocisnej Vyroby, Nitra (Slovak Republic)) | Tocka. I.
The objective of the experiment was to determine the digestibility of crude protein and fat in feed rations for minks with different percentage proportions of bovine liver as well as the digestibility of these nutrients in the bovine liver itself. Five male standard minks of 4 months age were included into the experiment, they were housed in balance cages. The experiment consisted of three stages. At the first stage (marked K) the animals were fed the control feed ration with the lowest proportion of bovine liver - 7.5%. The proportion of bovine liver rose to 22.8% at the second stage (marked E1), and to 47.7% out of the original proportion at the third stage (marked E2). Digestibility coefficient of crude protein rose significantly in dependence on the rising content of bovine liver in the feed rations values from 73.58 to 78.88%. There was a tendency to moderate decrease of fat digestibility with rising proportion of bovine liver in feed rations from 95.34 to 93.96%. Digestibility coefficient of crude protein was 80.17% and of fat 91.67% in the bovine liver itself. On base of result the maximum 45% proportion of bovine liver for feed rations for minks kept on farms is recommend
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