The effects of energy levels in feed on characteristics of internal organs of Meishan pigs.

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Twenty-six Meishan pigs and fourteen three-way crossbred pigs produced by F1 female from Landrace dam and Large White sire × Duroc terminal sire were fed with feed of three different TDN levels (70, 60 and 50%) during the period from 30kg to 90kg of body weight. The TDN levels were regulated by the percentages of alfalfa meal addition. The pigs were slaughtered at 90kg of body weight after fasting. The weight of each organ and the lengths of small and large intestines were recorded after the slaughter. The data of the measurements were analyzed by the minimum square method.The total sum of the weights of all the internal organs and the wight of each of stomach, large intestine, omentum and mesentery was significantly heavier in Meishan pigs (large intestine: p<0.05, others: p<0.01) than in the crossbred pigs. The length of the large intestine was longer in the Meishan pigs (p<0.01). The weights of liver and cecum increased with decreasing TDN levels in the feed (p<0.05). Conversely, the weight of heart decreased with decreasing TDN levels in the feed (p<0.01).There were no feed × breed interactions in any of the measured items.
日本養豚学会の論文