Effects of dietary n-3 polyunsaturated fatty acids and ... - FINS

1 st WorkshopXIII International Feed Technology SymposiumTable 1. Results of feed analyses on presence of igredients of animal origin in 2006.cattle sheep goat pigs poultryTOTAL 49 4 1 36 28negative 46 3 1 27 19positive 3 1 - 9 9% ofpositive6.12 25.00 0.00 25.00 32.14Significantly larger number of feed samples was examined in 2007. From a total of 579,344 samples of cattle mixtures were analysed, with a similar percentage of positiveresults to these in the previous year - 6.69% (Table 2). The percentage of positivesamples of feed for sheep, pigs and poultry, however, was far lower than in 2006, whichclearly points to the good results and success of feed control programs and informingproducers.Table 2. Results of feed analyses on presence of igredients of animal origin in 2007.cattle sheep pigs poultryMixed:pigs + poultryTOTAL 344 19 75 79 62negative 321 16 63 67 48positive 23 3 12 12 14% ofpositive6.69 15.79 16.00 15.19 22.58During 2008 microscopic analysis on the presence of animal contaminants of 509samples of different mixtures was done (Table 3). MBM was recorded in about 8% ofsamples of feed for cattle, although general trend of replacement of proteins of animalorigin by other sources of proteins, i.e. necessary amino acids was more clearlyobserved. Obvious indicator was further decrease of positive samples of feed for nonruminantsas a result of reduction of MBM usage.Table 3. Results of feed analyses on presence of igredients of animal origin in 2008.cattle sheep pigs poultryMixed:pigs + poultryTOTAL 299 23 51 36 100negative 275 20 45 34 71positive 24 3 6 2 29% ofpositive8.03 13.04 11.76 5.56 29.00On the other hand, the constant presence of traces of undesirable substances in feed forruminants can not be deemed to have reached a satisfactory level. Therefore, it is269