Effect of different diet protein levels on the digestibility and metabolism of nutritions and growth performance in young male mink

Abstract

The experiment was studied the ratio of digestibility and metabolism in male mink which fed with different protein level diets in the period of growth, and the effect of protein quantity on the growth and development in mink and the feed transformation efficiency. Sixty healthy male sables of 45d old were randomly divided into 6 groups with 10 replicates in which had 1 sable. The sables were fed with protein levels of 28% (group 1), 30% (group 2), 32% (group 3), 34% (group 4), 36% (group 5), 38% (group 6), respectively. The digestibility and metabolic ratio of nutritions were determined in 14d feed with trial diets. At the beginning of the trail, the male minks were weighted and registered in the interval of 2 weeks in order to calculating the average daily gain and the feed transformation efficiency. The results indicated that nitrogen of feed intake was greatly significantly difference among groups (P 0.05). Compared with the group 1, the group 4, group 5 and 6 group had greatly significantly difference in the average daily gain and feed conversion (P<0.01). In conclusion, when the protein level of diet was lower than 28% protein in the feed, then it had negetive effect on the growth and development of mink. When the protein in the diet met with quantity at the 34% 0f feed, the paremeters that included digestibility of nutrition, average daily gain and feed conversion rate in mink were more optimization than others.