TY - JOUR
T1 - Performance of preweaned Holstein calves given 2 phytogenic feed supplements in their starter grain
AU - Rossow, H. A.
AU - Martinez, M. J.G.
AU - Mitchell, K. E.
N1 - Funding Information:
We thank the California Dairy Research Foundation for providing funding for the graduate student, Kelly Mitchell. This project was funded by Biomin America Inc., Overland Park, Kansas.
PY - 2020/12
Y1 - 2020/12
N2 - Objective: Our objective was to determine whether preweaned steer and heifer calves given a phytogenic starter supplement (either one containing caraway, licorice, oak bark, and vanilla that was soluble in milk, PM, or one containing caraway, licorice, oak bark, and vanilla, PC) or no phytogenic supplement, control (CTR), at a commercial calf ranch would have increased starter intake, weight gain, or rumen development. Materials and Methods: Holstein calves (124) were randomly assigned to 1 of 3 treatments, CTR, PM, or PC, at 2 d of age. Supplements PM or PC were added to individual feed buckets at each feeding at the rate of 0.25 g/kg of starter at a.m. and p.m. feedings. Calves were weighed at enrollment and at weaning, and blood samples were collected from a subset of 13 calves per treatment to assess rumen development. Weekly average DMI, milk intake, Glu, and BHB were analyzed using the Mixed procedure of SAS (v. 9.4; SAS Institute Inc., Cary, NC) Results and Discussion: Weekly average DMI (P < 0.01), BHB (P < 0.01), and Glu (P < 0.01) were different by week but not by treatment. Product PC group was numerically greater in total DMI, gain, and ADG and had faster rumen development indicated by overall greater BHB values but were not different among treatments. Implications and Applications: Addition of PM or PC to starter feed did not increase DMI, rumen development, or BW gain. But, the dose may have been too small or not fed long enough to elicit a response during the preweaning period.
AB - Objective: Our objective was to determine whether preweaned steer and heifer calves given a phytogenic starter supplement (either one containing caraway, licorice, oak bark, and vanilla that was soluble in milk, PM, or one containing caraway, licorice, oak bark, and vanilla, PC) or no phytogenic supplement, control (CTR), at a commercial calf ranch would have increased starter intake, weight gain, or rumen development. Materials and Methods: Holstein calves (124) were randomly assigned to 1 of 3 treatments, CTR, PM, or PC, at 2 d of age. Supplements PM or PC were added to individual feed buckets at each feeding at the rate of 0.25 g/kg of starter at a.m. and p.m. feedings. Calves were weighed at enrollment and at weaning, and blood samples were collected from a subset of 13 calves per treatment to assess rumen development. Weekly average DMI, milk intake, Glu, and BHB were analyzed using the Mixed procedure of SAS (v. 9.4; SAS Institute Inc., Cary, NC) Results and Discussion: Weekly average DMI (P < 0.01), BHB (P < 0.01), and Glu (P < 0.01) were different by week but not by treatment. Product PC group was numerically greater in total DMI, gain, and ADG and had faster rumen development indicated by overall greater BHB values but were not different among treatments. Implications and Applications: Addition of PM or PC to starter feed did not increase DMI, rumen development, or BW gain. But, the dose may have been too small or not fed long enough to elicit a response during the preweaning period.
KW - bioactive compound
KW - calf ultrasound
KW - calf β-hydroxybutyrate
KW - rumen development
UR - http://www.scopus.com/inward/record.url?scp=85097179556&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85097179556&partnerID=8YFLogxK
U2 - 10.15232/aas.2020-02051
DO - 10.15232/aas.2020-02051
M3 - Article
AN - SCOPUS:85097179556
VL - 36
SP - 877
EP - 884
JO - Applied Animal Science
JF - Applied Animal Science
SN - 2590-2873
IS - 6
ER -