Abstract
In this study, the flesh of 406 three-way cross hybrid pigs was prepared for tests performed in the laboratory to examine the influence of nutrient intake on the fatty acid composition of pork back fat. Pigs for fattening weighed 65 kg at the beginning of the tests and 112 kg at the end. Results showed the average value of 5-6 pigs for each feeding group was 77 pigs. Nutrient intake during the study period included 2 249 g/d of total digestible nutrients (TDN), 399 g/d of protein, 111 g/d of crude fat and 1 794 g/d of nitrogen free extracts (NFE). Individual fatty acids were palmitic 18.3 g/d, stearic acid 5.2 g/ d, oleic acid 37.9 g/d, linoleic acid 43.7 g/d and endogenous fatty acids 61.4 g/ day. NFE, crude fat, palmitic acid, oleic acid and linoleic acid showed significant correlations between the fatty acid compositions of body fat and intake of nutrients. Especially linoleic acid intake was significantly related to the fatty acid composition of body fat. Increasing the intake of linoleic acid, increased linoleic acid in the body fat and conversely decreased endogenous fatty acids. If the intake of linoleic acid was less then 45 g/d, C18:2/C18:0 composition did not change and showed very little effect was seen in hardness of the fat. However, even with reduced intake of linoleic acid, the essential fatty acid linoleic acid accumulated to 7 % in the body fat. On the other hand, TDN and crude protein intake did not correlate with fatty acid composition of body fat.
