Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Effect of Frequency of Meals on Intake and Digestion of Tropical Grass Consumed by Rams

  • Assoumaya, C. (INRA, UR143, Unite de Recherches Zootechniques) ;
  • Sauvant, D. (INRA, UMR791, Unite de Physiologie de la Nutrition et Alimentation) ;
  • Pommier, F. (INRA, UE503, Unite Experimentale en Production et Sante Animale) ;
  • Boval, M. (INRA, UR143, Unite de Recherches Zootechniques) ;
  • Calif, B. (INRA, UR143, Unite de Recherches Zootechniques) ;
  • Archimede, H. (INRA, UR143, Unite de Recherches Zootechniques)
  • Received : 2008.01.26
  • Accepted : 2008.07.29
  • Published : 2009.01.01
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Abstract

Eight Black Belly rams (45.2 kg) fitted with permanent ruminal cannulae were used in a 2${\times}$2 factorial design to determine the effects of feeding frequency and regrowth age on intake and digestion. Rams were fed with 21- or 35-day old fresh pangola grass offered ad libitum two or four times a day. Irrespective of the regrowth age, there was a tendency for intake to be positively correlated with increase in meal frequency. Differences were not significant (p>0.25). Significant effects of meal frequency were observed in NDF and ADF total tract digestibility of the 35-day grass which decreased as the number of meals increased. Meal frequency had no visible effect on feeding behaviour. Total rumen content increased when animals were fed twice a day as opposed to four times a day. Similarly, an accumulation of small and very small particles was observed in the rumen of rams fed twice a day in comparison with those fed four times a day. These results suggest that studies of digestive dynamics performed at a steady state are not representative of the rumen loading observed in farm rams which have two important peaks of meal.

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References

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