Effect of diet with unhulled rice on the growth performance, carcass characteristics and meat quality in finishing pigs
2016
Suzuki, M. | Yamamoto, R. | Kurita, T.
Unhulled rice has advantages over brown rice for use in animal feeds owing to its cost effectiveness and better-preserved characteristics. To demonstrate its effect on growth performance, carcass characteristics, and meat quality, finishing pigs were fed a diet comprising up to 30% of unhulled rice. On the basis of physical examination, pigs weighing 80 kg were divided into three groups and fed one of the following three diets until they weighed 110 kg as follows: Group 1 pigs were fed the control diet (corn-based diet) and Group 2 and 3 pigs were fed experimental diets comprising 20% and 30% unhulled rice, respectively. Oil was added to the feed with unhulled rice for the adjustment of total digestible nutrients (TDN). A significant difference was observed only in the meat quality. With respect to the meat quality, the oleic acid ratio of the inner layer of backfat of pigs fed 20% or 30% unhulled rice diet tended to be higher than that of pigs fed the control diet. The melting point of this layer of backfat of pigs fed the 20% unhulled rice diet was significantly lower than that of pigs fed the control diet. Economic evaluation revealed the best performance among group 3 pigs. These results suggest that feed containing up to 30% unhulled rice with an adjustment of TDN could be used as feed for pigs.
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