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Effects of starch content of calf starter on growth and rumen pH in Holstein calves during the weaning transition.
J Dairy Sci 2012; 95(8):4478-87JD

Abstract

The objective of this study was to evaluate the effects of substituting high fiber byproducts for dry ground corn in calf starter on growth and rumen pH during the weaning transition. Holstein bull calves were raised on an intensified nursing program using milk replacer containing 26% CP and 18% fat. Calves were fed a texturized calf starter containing either dry ground corn at 18.8% of dry matter (DM; CRN), beet pulp replacing dry ground corn at 10.2% dietary DM (BP), or triticale dried distillers grains with solubles replacing dry ground corn and high-protein feedstuffs at 18.6% of dietary DM (DDGS) in the pellet; treatment calf starters differed only in the pellet portion. Starch concentrations of CRN, BP, and DDGS were 35.3, 33.4, and 31.4%, respectively. After a calf consumed 2.50 kg of starter for 3 consecutive days, a small ruminant rumen pH data logger was inserted orally and rumen pH was measured continuously for 4d. Calves were then killed and rumen fluid was sampled to determine volatile fatty acid profile. No difference was found in overall average daily gain or growth rates of hip height, withers height, and heart girth. During the weaning transition, rate of increase in calf starter intake was greater for calves fed DDGS compared with those fed CRN (87.7 vs. 77.5 g/d), but lower for calves fed BP compared with CRN (68.1 vs. 77.5 g/d). The area under pH 5.8 (470 vs. 295 min × pH/d) or pH 5.2 (72.7 vs. 16.4 min × pH/d) was greater for calves fed DDGS than those fed CRN. Rumen pH profile was not affected by BP treatment compared with CRN, but calves fed BP tended to have greater water intake than those fed CRN (6.6 vs. 5.8 L/d). Volatile fatty acid profile was not affected by treatment with the exception of molar proportion of butyrate, which tended to be lower for calves fed BP compared with those fed CRN (15.0 vs. 16.6%). Hay intake was positively correlated to mean rumen pH for calves used in this study (r=0.48). Decreasing dietary starch concentration did not mitigate rumen acidosis in calves during weaning transition, and low rumen pH did not adversely affect growth during the weaning transition.

Authors+Show Affiliations

Department of Animal, Food and Nutritional Science, Faculty of Agricultural, Life and Environmental Sciences, University of Alberta, Edmonton, Canada T6G 2P5.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22818462

Citation

Laarman, A H., et al. "Effects of Starch Content of Calf Starter On Growth and Rumen pH in Holstein Calves During the Weaning Transition." Journal of Dairy Science, vol. 95, no. 8, 2012, pp. 4478-87.
Laarman AH, Sugino T, Oba M. Effects of starch content of calf starter on growth and rumen pH in Holstein calves during the weaning transition. J Dairy Sci. 2012;95(8):4478-87.
Laarman, A. H., Sugino, T., & Oba, M. (2012). Effects of starch content of calf starter on growth and rumen pH in Holstein calves during the weaning transition. Journal of Dairy Science, 95(8), pp. 4478-87. doi:10.3168/jds.2011-4822.
Laarman AH, Sugino T, Oba M. Effects of Starch Content of Calf Starter On Growth and Rumen pH in Holstein Calves During the Weaning Transition. J Dairy Sci. 2012;95(8):4478-87. PubMed PMID: 22818462.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of starch content of calf starter on growth and rumen pH in Holstein calves during the weaning transition. AU - Laarman,A H, AU - Sugino,T, AU - Oba,M, PY - 2011/08/10/received PY - 2012/04/09/accepted PY - 2012/7/24/entrez PY - 2012/7/24/pubmed PY - 2012/12/18/medline SP - 4478 EP - 87 JF - Journal of dairy science JO - J. Dairy Sci. VL - 95 IS - 8 N2 - The objective of this study was to evaluate the effects of substituting high fiber byproducts for dry ground corn in calf starter on growth and rumen pH during the weaning transition. Holstein bull calves were raised on an intensified nursing program using milk replacer containing 26% CP and 18% fat. Calves were fed a texturized calf starter containing either dry ground corn at 18.8% of dry matter (DM; CRN), beet pulp replacing dry ground corn at 10.2% dietary DM (BP), or triticale dried distillers grains with solubles replacing dry ground corn and high-protein feedstuffs at 18.6% of dietary DM (DDGS) in the pellet; treatment calf starters differed only in the pellet portion. Starch concentrations of CRN, BP, and DDGS were 35.3, 33.4, and 31.4%, respectively. After a calf consumed 2.50 kg of starter for 3 consecutive days, a small ruminant rumen pH data logger was inserted orally and rumen pH was measured continuously for 4d. Calves were then killed and rumen fluid was sampled to determine volatile fatty acid profile. No difference was found in overall average daily gain or growth rates of hip height, withers height, and heart girth. During the weaning transition, rate of increase in calf starter intake was greater for calves fed DDGS compared with those fed CRN (87.7 vs. 77.5 g/d), but lower for calves fed BP compared with CRN (68.1 vs. 77.5 g/d). The area under pH 5.8 (470 vs. 295 min × pH/d) or pH 5.2 (72.7 vs. 16.4 min × pH/d) was greater for calves fed DDGS than those fed CRN. Rumen pH profile was not affected by BP treatment compared with CRN, but calves fed BP tended to have greater water intake than those fed CRN (6.6 vs. 5.8 L/d). Volatile fatty acid profile was not affected by treatment with the exception of molar proportion of butyrate, which tended to be lower for calves fed BP compared with those fed CRN (15.0 vs. 16.6%). Hay intake was positively correlated to mean rumen pH for calves used in this study (r=0.48). Decreasing dietary starch concentration did not mitigate rumen acidosis in calves during weaning transition, and low rumen pH did not adversely affect growth during the weaning transition. SN - 1525-3198 UR - https://www.unboundmedicine.com/medline/citation/22818462/Effects_of_starch_content_of_calf_starter_on_growth_and_rumen_pH_in_Holstein_calves_during_the_weaning_transition_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-0302(12)00437-7 DB - PRIME DP - Unbound Medicine ER -