PMID: 9436256Jan 22, 1998Paper

Changes in factors affecting the rate of digesta passage during pregnancy and lactation in sheep fed on hay

Reproduction, Nutrition, Development
M Kaske, A Groth

Abstract

The objective of this study was to assess feed intake and digesta passage characteristics in five Blackhead ewes fed hay ad libitum during pregnancy [I: d 60-80 post conceptionem (p conc); II: d 105-125 p conc; III: d 128-148 p conc] and lactation [IV: d 10-30 post partum (pp); V: d 35-55 pp]. During pregnancy, feed intake and rumination activity increased. The rumen fluid volume and the daily number of A-cycles did not change significantly. The mean retention time (MRT) of the fluid and particle markers in the reticulorumen (RR) and distal to the RR decreased by 14-32%. During lactation, the rumen fluid volume increased as compared to pregnancy by about 15%. Daily feed intake peaked during period V (83.7 g DM/kg BW0.75). The MRT of particle markers in the RR increased as compared with late pregnancy. Both during pregnancy and lactation, the increased passage rate of digesta was achieved predominantly by an increased amount of digesta passing through the reticulo-omasal orifice during each opening. Sieving of forestomach contents and faeces revealed that the breakdown rate of large feed particles did not limit digesta passage.

Citations

Dec 6, 2005·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·W von EngelhardtM Lechner-Doll
Jun 25, 2009·Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology·Angela SchwarmMarcus Clauss
Nov 26, 2010·Journal of Animal Physiology and Animal Nutrition·A F ParkD E Johnson
Dec 15, 2004·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·M ClaussH Hofer
Jun 7, 2005·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Jürgen HummelErnst Pfeffer
Apr 30, 2015·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·Marie T DittmannMarcus Clauss
Dec 18, 2007·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Jürgen HummelMarcus Clauss
Feb 1, 2015·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Marie T DittmannMarcus Clauss
Apr 26, 2002·Journal of Animal Physiology and Animal Nutrition·M KaskeS Wagner
Jul 25, 2000·Journal of Dairy Science·K L Ingvartsen, J B Andersen
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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