Quality control in pig feeds
Good quality control is needed within the feed industry, since imported
soya used for pig feeds increases the risk of variability in
Dr Julian Wiseman, professor of animal production at
Nottingham University, points that out in Technical Update, an electronic
newsletter for UK-based pig-breeding company ACMC.
Difference in nutritional value exists because different operating
conditions are used for heat-processing the soya before adding it to the pig
diets. This processing is necessary since raw soya beans contain a number of
Wiseman said, "The problems of ignoring this become greater when processed
raw materials are used more frequently and at higher rates of inclusion. This is
precisely what is happening with soya beans."
Soya has been imported largely since the EU banned mammalian proteins in
livestock diets. According to Wiseman the use of whole soya beans or
oil-extracted meal now accounts for over 50% of EU protein equivalents in
While temperature is the most influential aspect of processing, humidity,
time and particle size may also be changed, which increases the variability and
ultimate nutritional value.
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