Digestibility of nitrogen from feed for minks with various proportions of cod
1996
Mertin, D. | Suevegova, K. | Rafay, J. | Ceresnakova, Z. (Vyskumny Ustav Zivocisnej Vyroby, Nitra (Slovakia)) | Barabasz, B.
The experiment consisted of three stages to determine the digestibility of nitrogen from feed ration with various proportions of cod fillet administered to minks and nitrogen digestibility in the test feed. The animals received basal feed ration in the first stage while in the second stage the content of test feed in the feed ration was 41.7 % and in the third stage 62.5 % out of the original amount. Indicators necessary to calculate digestibility coefficients for feed rations and test feed were: feed intake, remaining uneaten feed and amount of excrements. Coefficient of nitrogen digestibility in the basal feed ration was 67.661+/-1.180 %, in the feed ration with 41.7 % of cod fillet 72.327+/-0.613 % and in the feed ration with 62.5 % proportion of test feed 81.563+/-1.095 %. The obtained results of nitrogen digestibility in the test feed rations are statistically significant. Coefficient of nitrogen digestibility in cod fillet used in feed ration with 41.7 % proportion of test feed was 81.240+/-0.864 % and in the feed ration with 62.5 % of test feed it amounted to 93.020+/-1.033 %. It can be concluded from the results obtained that the coefficient of nitrogen digestibilty is increasing in relation to the per cent proportion of test feed.
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