Digestibility of dietary proteins and fats from diets with different proportions of beef for minks
2000
Suevegova, K. | Mertin, D. | Ceresnakova, Z. | Podolanova, E. (Vyskumny Ustav Zivocisnej Vyroby, Nitra (Slovak Republic)) | Tocka, I.
The objective of the experiment was to determine digestibility of dietary proteins and fats from diets for minks with different percentage proportions of beef and digestibility of these nutrients in the feed itself. The experiment consisted of four separate stages. The animals received control diets with the lowest proportion of beef - 31.4 % in stage I. Beef contents were increased to 40.3 % in stage II, to 44.3 % in stage III and to 55.2 % of the initial content in stage IV. Protein digestibility coefficient in the experimental diets for minks with increasing percentage of dietary beef increases from 76.94 to 81.09 % and fat digestibility coefficient decreases from 94.22 to 89.88 %. Significant differences in protein and fat digestibility were established between control diet and experimental diets with higher beef percentage as well as between the separate experimental diets. Digestibility coefficients of proteins and fat for beef were 85.87 % and 88.13 %, respectively.
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