PMID: 9436251Jan 22, 1998Paper

Effects of intake level of a mixed diet on chewing activity and on particle size of ruminated boli, ruminal digesta fractions and faeces of steers

Reproduction, Nutrition, Development
P L KovácsM Stangassinger

Abstract

This study evaluated the effects of intake of a mixed diet on chewing activity during eating and rumination and the relationship between the chewing activity and the particle size of the ruminated boli, ruminal digesta fractions and faeces in steers. Six ruminally cannulated steers received a mixed forage/concentrate diet (68:32, dry matter basis). The diet was offered twice daily at approximately 1, 1.5 and 2 times the estimated maintenance energy requirements (low, medium and high intake, respectively) in a repeated 3 x 3 Latin square design. The rumens were emptied manually and samples of the ruminated boli and of the ruminal upper strata were collected at four different times throughout the day. The dry matter weight distribution of the total amount of recovered particles was determined by a wet-sieving procedure. Numerically, the effect of intake on the mean particle sizes of the different materials was small. However, the mean particle size was reduced by almost nine tenths from their size at intake of the mixed diet (4.78 mm) to defecation (0.51 mm). The total number of minutes chewing and eating and ruminating increased as the intake level increased. When related to 1 kg of dry matter intake, only the eating and chewing...Continue Reading

Citations

Jul 10, 2012·Veterinary Research Communications·Shigeru SatoHitoshi Mizuguchi
Mar 27, 2009·Journal of Animal Physiology and Animal Nutrition·J HummelM Clauss
Mar 27, 2016·Journal of Animal Physiology and Animal Nutrition·M ClaussD Codron
May 4, 2021·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Eva FindeisenMarcus Clauss
Jul 14, 2021·Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology·Eva FindeisenMarcus Clauss

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