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Conjugated linoleic acid increases in milk from cows fed condensed corn distillers solubles and fish oil.
J Dairy Sci. 2008 Jul; 91(7):2796-807.JD

Abstract

Twelve lactating Holstein cows were randomly assigned to 1 of 4 experimental diets in a replicated 4 x 4 Latin square design with 4-wk periods to ascertain the lactational response to feeding fish oil (FO), condensed corn distillers solubles (CDS) as a source of extra linoleic acid, or both. Diets contained either no FO or 0.5% FO and either no CDS or 10% CDS in a 2 x 2 factorial arrangement of treatments. Diets were fed as total mixed rations for ad libitum consumption. The forage to concentrate ratio was 55:45 on a dry matter basis for all diets and the diets contained 16.2% crude protein. The ether extract concentrations were 2.86, 3.22, 4.77, and 5.02% for control, FO, CDS, and FOCDS diets, respectively. Inclusion of FO or CDS or both had no effect on dry matter intake, feed efficiency, body weight, and body condition scores compared with diets without FO and CDS, respectively. Yields of milk (33.3 kg/d), energy-corrected milk, protein, lactose, and milk urea N were similar for all diets. Feeding FO and CDS decreased milk fat percentages (3.85, 3.39, 3.33, and 3.12%) and yields compared with diets without FO and CDS. Proportions of trans-11 C18:1 (vaccenic acid), cis-9 trans-11 conjugated linoleic acid (CLA; 0.52, 0.90, 1.11, and 1.52 g/100 g of fatty acids), and trans-10 cis-12 CLA (0.07, 0.14, 0.13, and 0.16 g/100 g of fatty acids) in milk fat were increased by FO and CDS. No interactions were observed between FO and CDS on cis-9 trans-11 CLA although vaccenic acid tended to be higher with the interaction. The addition of CDS to diets increased trans-10 C18:1. Greater ratios of vaccenic acid to cis-9 trans-11 CLA in plasma than in milk fat indicate tissue synthesis of cis-9 trans-11 CLA in the mammary gland from vaccenic acid in cows fed FO or CDS. Feeding fish oil at 0.5% of diet dry matter with a C18:2 n-6 rich source such as CDS increased the milk CLA content but decreased milk fat percentages.

Authors+Show Affiliations

Dairy Science Department, South Dakota State University, Brookings 57007-0647, USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

18565937

Citation

Bharathan, M, et al. "Conjugated Linoleic Acid Increases in Milk From Cows Fed Condensed Corn Distillers Solubles and Fish Oil." Journal of Dairy Science, vol. 91, no. 7, 2008, pp. 2796-807.
Bharathan M, Schingoethe DJ, Hippen AR, et al. Conjugated linoleic acid increases in milk from cows fed condensed corn distillers solubles and fish oil. J Dairy Sci. 2008;91(7):2796-807.
Bharathan, M., Schingoethe, D. J., Hippen, A. R., Kalscheur, K. F., Gibson, M. L., & Karges, K. (2008). Conjugated linoleic acid increases in milk from cows fed condensed corn distillers solubles and fish oil. Journal of Dairy Science, 91(7), 2796-807. https://doi.org/10.3168/jds.2007-0938
Bharathan M, et al. Conjugated Linoleic Acid Increases in Milk From Cows Fed Condensed Corn Distillers Solubles and Fish Oil. J Dairy Sci. 2008;91(7):2796-807. PubMed PMID: 18565937.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Conjugated linoleic acid increases in milk from cows fed condensed corn distillers solubles and fish oil. AU - Bharathan,M, AU - Schingoethe,D J, AU - Hippen,A R, AU - Kalscheur,K F, AU - Gibson,M L, AU - Karges,K, PY - 2008/6/21/pubmed PY - 2008/9/4/medline PY - 2008/6/21/entrez SP - 2796 EP - 807 JF - Journal of dairy science JO - J Dairy Sci VL - 91 IS - 7 N2 - Twelve lactating Holstein cows were randomly assigned to 1 of 4 experimental diets in a replicated 4 x 4 Latin square design with 4-wk periods to ascertain the lactational response to feeding fish oil (FO), condensed corn distillers solubles (CDS) as a source of extra linoleic acid, or both. Diets contained either no FO or 0.5% FO and either no CDS or 10% CDS in a 2 x 2 factorial arrangement of treatments. Diets were fed as total mixed rations for ad libitum consumption. The forage to concentrate ratio was 55:45 on a dry matter basis for all diets and the diets contained 16.2% crude protein. The ether extract concentrations were 2.86, 3.22, 4.77, and 5.02% for control, FO, CDS, and FOCDS diets, respectively. Inclusion of FO or CDS or both had no effect on dry matter intake, feed efficiency, body weight, and body condition scores compared with diets without FO and CDS, respectively. Yields of milk (33.3 kg/d), energy-corrected milk, protein, lactose, and milk urea N were similar for all diets. Feeding FO and CDS decreased milk fat percentages (3.85, 3.39, 3.33, and 3.12%) and yields compared with diets without FO and CDS. Proportions of trans-11 C18:1 (vaccenic acid), cis-9 trans-11 conjugated linoleic acid (CLA; 0.52, 0.90, 1.11, and 1.52 g/100 g of fatty acids), and trans-10 cis-12 CLA (0.07, 0.14, 0.13, and 0.16 g/100 g of fatty acids) in milk fat were increased by FO and CDS. No interactions were observed between FO and CDS on cis-9 trans-11 CLA although vaccenic acid tended to be higher with the interaction. The addition of CDS to diets increased trans-10 C18:1. Greater ratios of vaccenic acid to cis-9 trans-11 CLA in plasma than in milk fat indicate tissue synthesis of cis-9 trans-11 CLA in the mammary gland from vaccenic acid in cows fed FO or CDS. Feeding fish oil at 0.5% of diet dry matter with a C18:2 n-6 rich source such as CDS increased the milk CLA content but decreased milk fat percentages. SN - 1525-3198 UR - https://www.unboundmedicine.com/medline/citation/18565937/Conjugated_linoleic_acid_increases_in_milk_from_cows_fed_condensed_corn_distillers_solubles_and_fish_oil_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-0302(08)71153-6 DB - PRIME DP - Unbound Medicine ER -