Abstract
ABSTRACT The incidence of PSE(Pale, Soft, Exudative) pork by slaughter weight and handling conditions at preslaughtering stage such as fattening period, transport and lairage time were compared. The incidence of PSE pork were 24.9% when pigs were fed under 180 days and 18.9% when pigs were fed over 180 days for fattening. In the transport time from farm to slaughter house, the incidence of PSE pork were 46.6% for shorter than 30min and 45.65% for 30 minq60 min and 35.44% for longer than 60min. The incidence of PSE pork were 55.6% for pigs had no lairage before slaughter, 33.9% for pigs held in lairage overnight. Therefore, the incidence of PSE pork were decreased by 6% with the extension of the fattening period and 9% with the transport time of longer than 1hr and 22.1% with lairage treatment before slaughter. The incidence of PSE pork were different in different location of farms and there were no significantly different in live weight, carcass weight and carcass yield between groups of lairage treatment. In conclusion, handling condition at preslaughtering stage such as extension of fattening period and lairage time were important to control pork quality and lairage treatment was not decreased the carcass yield.(
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