Evaluation of selected parameters of quality and nutritive value of meat of fattened bulls fed diet with distillers dried grains with solubles (DDGS) from wheat or maize as a source of protein.

摘要

The objective of this study was to evaluate the quality and nutritive value of meat of bulls receiving wheat or maize DDGS (distillers dried grains with solubles) as a source of protein in a feed ration. The Hereford bulls were fed maize silage, hay and concentrates. The factor differentiating the feeding of experimental groups was the composition of concentrates. All concentrates contained cereal meals, rapeseed cake, and additionally - depending on the group: soybean meal (group CC), wheat DDGS (group EC-1), and maize DDGS (group EC-2). The feed ration was found not to affect the chemical composition of Longissimus thoracis muscle. All feeding groups were characterised by a similar total content of SFA, MUFA and PUFA. The EC-2 group was characterised by a significantly higher content of C18:1 n-7 acid as compared to the two other groups and of CLA when compared to EC-1 group. L. thoracis muscle of animals from CC group was characterised by the highest content of C14:1, C 16:1 n-9, C 17:1 and C20:1 n-9 acids, with the differences being statistically significant when compared to EC-2 group. In group EC-2 analyses demonstrated a statistically higher n-6-3 PUFA ratio, in respect of the other groups. Muscle of the animals from EC-2 group, compared to that of CC group, was characterised by a significantly higher content of alpha -tocopherol. Out of the analysed quality parameters of meat, only pH value in group EC-1 was higher than in EC-2 group.