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FEED INTAKE AND DIGESTIVE INDICES IN PIGS FED DIETS BASED ON GLUCOSE AND TORULA YEAST  [2001]

Piloto, J.L., Instituto de Investigaciones Porcinas. Gaveta Postal No. 1, Punta Brava. La Habana, Cuba Ly, J, Instituto de Investigaciones Porcinas. Gaveta Postal No. 1, Punta Brava. La Habana, Cuba

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Four 25 kg pigs were used according to a 4x4 Latin square design to determine the effect of level of feed intake ((0.052, 0.112, 0.154 and 0.194 kg DM/kg0.75 per day respectively) on mouth-to-rectum digestive indices. The diets consisted of D-glucose and torula yeast plus vitamins and minerals (63:35:2 in dry basis). There was a linear effect (P0.01) of level of feed intake on faecal DM concentration (r, - 0.765) and daily faecal output of fresh material (r, 0.865). The level of feed intake determined a significant (P0.05, depressing linear effect on DM (r, - 0.548), organic matter (r, _ 0.566), energy (r, _ 0.609) and N (r, _ 0.472) digestibility. There was no influence of level of feed intake on ash digestibility. There appeared to be a non significant curvilinear influence of level of feed intake on faecal indices with lowest values for pH (6.32) and highest values for short chain fatty acids and ammonia (72.5 y 30.5 mmol/100 g DM respectively) when feed intake was 0.154 kg DM/kg0.75). This quadratic effect was a trend (P0.10) for daily output of both metabolites. Data from the current study remark that the level of feed intake must be referred in digestibility studies in pigs. If it is assumed that precaecal digestibility of D-glucose is complete, the variations in mouth-to-rectum digestibility indices must be exclusively due to microbial digestion of the protein source in the large intestine of the animals according to the level of feed intake

From the journal

Revista Computadorizada de Producción Porcina (Cuba)

ISSN : 1026-9053

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