Untersuchungen zur Bewertung der Einsatzmöglichkeit verschiedener Futterfette in der Schweinemast

Investigations on the Use of Different Feeding Fats for Growing Fattening Pigs In a feeding experiment with 100 castrated male pigs (Deutsche Landrasse) two types of feeding oils (fat/fatty acid mixtures) were compared to four types of animal and vegetable fats (animal fat, soya oil, rapeseed oil and a licithine mixture). Their influence on growth, feed utilisation, quality of carcass and composition of body fat during a growing-fattening period from 20 kg-100 kg was investigated. The different types of fats were incorporated in a barley-soya-ration at a level of 4%. In addition one ration contained milled whole soya beans at a level equivalent to 4% fat. All groups were fed according to live weight the same amounts of digestible protein and metabolizable energy. During the whole growing-fattening period, the average daily gain of all groups was 0.78 kg, while the group given animal fat showed a small advantage over those given vegetable fat or feeding oils (fat/fatty acid mixtures). Feed convertion corresponded to these findings. But the differences of daily gain and feed convertion amounting to a maximum of 5% failed to reach significance. Remarkable differences of carcass quality were not detected. Fatty acid composition of backfat was strongly influenced by the type of fat in the ration. In the group fed a ration with animal fat the fatty acid composition of backfat was approximately the same as that of the control group. The groups of which the rations were supplemented with vegetable fats had an increased content of linoleic acid and linolenic acid and a decreased content of palmitic acid, stearic acid and oleic acid. Consequently, the iodine number of backfat in the groups supplemented with vegetable fats came up to 80. There was no difference observed in storage stability of backfat between the groups.