Wskaźniki rozrodu norek przy zastosowaniu różnych warunków żywienia

Abstrakt

In a mink farm located in SE Poland, puppies from scanbrown morph after weaning from monthers were selected into 2 groups, 50 individuals each (I experimental, II control). Both groups were fed with the same feed. The energetic value for 1 kg was: 1800–2500 Kcal/EM, depending on the growth stage,protein 32–35%; fat 45–50%. The difference between two groups was in the use of feed in group I with an additional preservative sodium pyrosulphite in dose 0.2; 0.3 of total feed mass with Rendox antioxidant 0.15–0.20 per 1 kg of feed. Both preservatives were added into fish-meat components stored in cooling room. Several breeding parameters were controlled: percentage of fertilized and sterile females, average brood size, percentage losses of puppies on 7^th day,between 7^th–21^st days and the number of puppies weaned from a statistical dam, mass of breed and puppies on 2^nd, 7^th, 14^th and 21^st days. Our results indicate clearly that adding preservative and antioxidate influenced positively the sanitary standard of feed in group I where we received higher and more satisfying breeding parameters in comparison to the control group.