INFLUENCE OF LINSEED ON FATTENING PERFORM ANCE AND FAT QUALITY OF BROILERS

The influence of different amounts of linseed (0, 2, 4, 6, 10 and 15%) in rations of 660 Cobb-broilers on fattening parameters, some-blood p arameters of metabolism, the content of IMF, the pattern of fatty acid s and the stability of fat was investigated in two fattening experimen ts. In spite of the same rations and environment the fattening paramet ers were different in this two experiments. In the first experiment 10 % of linseed in ration resulted in decreased growth parameters. The fe edintake and the weight of broilers in the second experiment were redu ced with 2% of linseed in feed already. After feeding the ration with 6% of linseed the weight of animals decreased by 153 g compared with t he controll group. Containing 10 and 15% of linseed the weight decreas ed by 277 and 442 g per animal, respectively. The content of IMF and t he total cholesterol and trigylcerides in blood were not influenced by feeding linseed. The pattern of fatty acids in edible parts (meat), i n abdominal fat and in IMF changed significantly. The contents of olei c and linolic acid decreased insignificantly, the content of the linol enic acid increased by more than one order. The results of the Rancima t-test demonstrated decreased stability of fat against oxygen by incre ased amounts of Linseed. Consequently the taste of meat changed after storage. It can be recommended a maximum supplementation of 2% of lins eed for starter and fattening rations for broiler.