Digestibility, Rate of Passage and Rate of Gain in the Gastrectomized Pig

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Abstract
Pigs averaging 40 kg. in bodyweight were gastrectomized and their digestive ability compared with pair-fed intact controls. Four out of seven pigs survived the operation and were used in digestibility studies during the following 3 months. Upon feeding a 16% protein basal diet containing barley supplemented with soybean meal and fish meal, gastrectomy significantly (P<.01) reduced the digestibility of dry matter and protein by 4.8 and 14.0 percentage units, respectively. When the same diet diluted with 15% corn oil was fed, the digestibility of dry matter, protein and fat were significantly (P<01) reduced by 8.7, 13.7 and 23.5 percentage units, respectively. Studies using chromic oxide as a marker indicated that gastrectomy had little effect on the rate of passage of the basal diet through the digestive tract of pigs (24.0 hr. in controls and 26.8 hr. in gastrectomized). The 15% corn oil diet, however, was markedly retarded in passing through the controls (46.7 hr.) and slightly accelerated (22.3 hr.) in gastrectomized pigs. Copyright © 1967. American Society of Animal Science . Copyright 1967 by American Society of Animal Science

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