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Short communication: Lactational responses to palmitic acid supplementation when replacing soyhulls or dry ground corn.
J Dairy Sci. 2016 Mar; 99(3):1945-1950.JD

Abstract

The objective of this study was to evaluate the response of mid-lactation dairy cows to a palmitic acid (C16:0)-enriched fatty acid supplement when replacing soyhulls or dry ground corn in the diet. Twenty-four multiparous Holstein cows (182 ± 60 d in milk; mean ± SD) were blocked by preliminary 3.5% fat-corrected milk and randomly assigned to treatment sequence in a replicated 3 × 3 Latin square design with 21-d periods. Treatments consisted of a control diet containing no supplemental fat (CON), and 2 C16:0-enriched fatty acid-supplemented treatments (PA; BergaFat F100, Berg & Schmidt, Hanover, Germany) as a replacement for either soyhulls (PA-SH) or dry ground corn (PA-CG). The C16:0-enriched supplement was fed at 1.5% of diet dry matter. The PA treatments did not affect dry matter intake, but PA-SH increased dry matter intake by 1.4 kg/d compared with PA-CG. The PA treatments did not affect milk yield; however, PA-SH increased milk yield by 2.4 kg/d compared with PA-CG. The PA treatments tended to decrease milk protein content (3.12 vs. 3.15%). In contrast, PA-SH increased milk protein content (3.14 vs. 3.10%) and milk protein yield (1.27 vs. 1.19 kg/d) compared with PA-CG. The PA treatments increased milk fat concentration (3.68 vs. 3.55%) and milk fat yield (1.46 vs. 1.38 kg/d). The increase in milk fat yield with PA treatments was due to the increase in the yield of 16-carbon fatty acid in milk fat. Furthermore, PA-SH tended to increase yield of de novo fatty acids and yield of 16-carbon fatty acids compared with PA-CG. The PA treatments tended to increase feed efficiency (3.5% fat-corrected milk/dry matter intake) compared with CON (1.51 vs. 1.46). The PA-SH treatment tended to increase insulin concentration compared with PA-CG (1.58 vs. 1.49 μg/L) and PA treatments increased nonesterified fatty acids compared with CON (110 vs. 99 μEq/L). Overall, PA treatments improved feed efficiency and increased milk fat yield and the response to the C16:0-enriched fatty acid supplement was greater when it replaced soyhulls compared with when it replaced dry ground corn in the diet.

Authors+Show Affiliations

Department of Animal Science, Michigan State University, East Lansing 48824.Department of Animal Science, Michigan State University, East Lansing 48824.Department of Animal Science, Michigan State University, East Lansing 48824. Electronic address: allock@msu.edu.

Pub Type(s)

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

Language

eng

PubMed ID

26805968

Citation

de Souza, J, et al. "Short Communication: Lactational Responses to Palmitic Acid Supplementation when Replacing Soyhulls or Dry Ground Corn." Journal of Dairy Science, vol. 99, no. 3, 2016, pp. 1945-1950.
de Souza J, Preseault CL, Lock AL. Short communication: Lactational responses to palmitic acid supplementation when replacing soyhulls or dry ground corn. J Dairy Sci. 2016;99(3):1945-1950.
de Souza, J., Preseault, C. L., & Lock, A. L. (2016). Short communication: Lactational responses to palmitic acid supplementation when replacing soyhulls or dry ground corn. Journal of Dairy Science, 99(3), 1945-1950. https://doi.org/10.3168/jds.2015-10367
de Souza J, Preseault CL, Lock AL. Short Communication: Lactational Responses to Palmitic Acid Supplementation when Replacing Soyhulls or Dry Ground Corn. J Dairy Sci. 2016;99(3):1945-1950. PubMed PMID: 26805968.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Short communication: Lactational responses to palmitic acid supplementation when replacing soyhulls or dry ground corn. AU - de Souza,J, AU - Preseault,C L, AU - Lock,A L, Y1 - 2016/01/21/ PY - 2015/09/08/received PY - 2015/11/17/accepted PY - 2016/1/26/entrez PY - 2016/1/26/pubmed PY - 2016/10/21/medline KW - fat supplementation KW - feed efficiency KW - milk fat KW - palmitic acid SP - 1945 EP - 1950 JF - Journal of dairy science JO - J Dairy Sci VL - 99 IS - 3 N2 - The objective of this study was to evaluate the response of mid-lactation dairy cows to a palmitic acid (C16:0)-enriched fatty acid supplement when replacing soyhulls or dry ground corn in the diet. Twenty-four multiparous Holstein cows (182 ± 60 d in milk; mean ± SD) were blocked by preliminary 3.5% fat-corrected milk and randomly assigned to treatment sequence in a replicated 3 × 3 Latin square design with 21-d periods. Treatments consisted of a control diet containing no supplemental fat (CON), and 2 C16:0-enriched fatty acid-supplemented treatments (PA; BergaFat F100, Berg & Schmidt, Hanover, Germany) as a replacement for either soyhulls (PA-SH) or dry ground corn (PA-CG). The C16:0-enriched supplement was fed at 1.5% of diet dry matter. The PA treatments did not affect dry matter intake, but PA-SH increased dry matter intake by 1.4 kg/d compared with PA-CG. The PA treatments did not affect milk yield; however, PA-SH increased milk yield by 2.4 kg/d compared with PA-CG. The PA treatments tended to decrease milk protein content (3.12 vs. 3.15%). In contrast, PA-SH increased milk protein content (3.14 vs. 3.10%) and milk protein yield (1.27 vs. 1.19 kg/d) compared with PA-CG. The PA treatments increased milk fat concentration (3.68 vs. 3.55%) and milk fat yield (1.46 vs. 1.38 kg/d). The increase in milk fat yield with PA treatments was due to the increase in the yield of 16-carbon fatty acid in milk fat. Furthermore, PA-SH tended to increase yield of de novo fatty acids and yield of 16-carbon fatty acids compared with PA-CG. The PA treatments tended to increase feed efficiency (3.5% fat-corrected milk/dry matter intake) compared with CON (1.51 vs. 1.46). The PA-SH treatment tended to increase insulin concentration compared with PA-CG (1.58 vs. 1.49 μg/L) and PA treatments increased nonesterified fatty acids compared with CON (110 vs. 99 μEq/L). Overall, PA treatments improved feed efficiency and increased milk fat yield and the response to the C16:0-enriched fatty acid supplement was greater when it replaced soyhulls compared with when it replaced dry ground corn in the diet. SN - 1525-3198 UR - https://www.unboundmedicine.com/medline/citation/26805968/Short_communication:_Lactational_responses_to_palmitic_acid_supplementation_when_replacing_soyhulls_or_dry_ground_corn_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-0302(16)00073-4 DB - PRIME DP - Unbound Medicine ER -