Effects of forage feeding level on ruminal pH and metabolic adaptation of the rumen epithelium in pre-weaned Jersey calves
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Animal nutrition trial on forage feeding in calves; domain science.
This experiment studies calf nutrition and rumen physiology, not research.
Animal nutrition physiology study of calf rumen pH and SCFA transport.
Résumé
The objective of this study was to determine the effect of limiting forage provision in pre-weaned calves on ruminal pH and short chain fatty acid (SCFA) transport capacity during the pre-weaning period. Twelve Jersey bull calves (age = 1.9 ± 0.8 d) were housed individually on sand. All calves were fed milk replacer at 1,200 g/d and texturized grain-based starter ad libitum from birth. Calves were randomly assigned one of two treatments: ad libitum forage (ALF) or limited forage provision, where forage was limited to 90 g/d as-fed (LFP). Individual feed intake was recorded daily, calf weights, and jugular blood samples were collected weekly. Once calves consumed 680 g/d of calf starter, ruminal pH was measured for seven days after which calves were humanely killed and rumen fluid sampled. During the pre-weaning period, starter intake, feed efficiency, plasma glucose and β-hydroxybutyrate (BHB) concentration, SCFA concentration, average daily gain, and body weight were not different between treatments. Forage intake for ALF calves was greater than LFP beginning at wk 9 (255 ± 34 vs. 71 ± 40 g/d, respectively). Compared to ALF, LFP decreased mean ruminal pH (6.38 ± 0.16 vs. 5.98 ± 0.23) and duration of time where rumen pH was below 5.8 (796 ± 145 vs. 261 ± 133 min/d). Epithelial markers of SCFA transport and cell homeostasis (MCT1, NBC1, NHE3) were not affected by treatment. In conclusion, incidence of sub-acute ruminal acidosis in limited forage-fed calves did not have the same effects on intake and nutrient transporters seen in adult cows.
Conservé avec la notice de tri, où il sert de preuve aux étiquettes ci-dessus.
La notice
- Revue
- Veterinary and Animal Science
- Thématique
- Ruminant Nutrition and Digestive Physiology
- Domaine
- Agricultural and Biological Sciences
- Établissements canadiens
- University of Alberta
- Organismes subventionnaires
- U.S. Department of Agriculture
- Mots-clés
- ForageRumenWeaningAnimal scienceStarterVolatile fatty acidsLimitingBiologyAgronomyFood scienceFermentation
- Résumé présent dans OpenAlex
- oui