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Effects of conjugated linoleic acids and dietary concentrate proportion on performance, milk composition, milk yield and metabolic parameters of periparturient dairy cows.
Arch Anim Nutr. 2013 Jun; 67(3):185-201.AA

Abstract

The study aimed to examine effects of supplemented conjugated linoleic acids (CLA) to periparturient cows receiving different concentrate proportions ante partum (a.p.) to investigate CLA effects on lipid mobilisation and metabolism. Compared to adapted feeding, a high-concentrate diet a.p. should induce a ketogenic metabolic situation post partum (p.p.) to better understand how CLA works. Sixty-four pregnant German Holstein cows had ad libitum access to partial mixed rations 3 weeks prior to calving until day 60 p.p. Ante partum, cows received control fat (CON) or a CLA supplement at 100 g/d, either in a low-concentrate (CON-20, CLA-20) or high-concentrate diet (CON-60, CLA-60). Post partum, concentrate proportion was adjusted, while fat supplementation continued. After day 32 p.p., half of the animals of CLA-groups changed to CON supplementation (CLA-20-CON, CLA-60-CON). A ketogenic metabolic situation p.p. was not achieved and therefore impacts of CLA could not be examined. Live weight, milk yield and composition, blood parameters remained unaffected by the treatments. Only a slightly reduced milk fat yield (not significant) was recorded for Group CLA-20. The proportion of trans-10,cis-12 (t10,c12) CLA in milk fat was significantly increased in CLA-groups compared to CON-groups. With the exception of a reversible CLA effect on milk fat in Group CLA-20, no post-treatment effects occurred. Dry matter intake (DMI) of Group CLA-60 was highest before calving, resulting in a significantly improved estimated energy balance after calving. Ante partum, net energy intakes were significantly increased in high-concentrate groups. Overall, supplemented CLA preparation did not relieve metabolism and lipid mobilisation of early lactating cows. But feeding CLA in a high-concentrate diet a.p. seems to increase DMI and thereby improve the energy balance of cows immediately after calving.

Authors+Show Affiliations

Institute of Animal Nutrition, Federal Research Institute for Animal Health, Braunschweig, Germany.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

23678986

Citation

Petzold, Maria, et al. "Effects of Conjugated Linoleic Acids and Dietary Concentrate Proportion On Performance, Milk Composition, Milk Yield and Metabolic Parameters of Periparturient Dairy Cows." Archives of Animal Nutrition, vol. 67, no. 3, 2013, pp. 185-201.
Petzold M, Meyer U, Kersten S, et al. Effects of conjugated linoleic acids and dietary concentrate proportion on performance, milk composition, milk yield and metabolic parameters of periparturient dairy cows. Arch Anim Nutr. 2013;67(3):185-201.
Petzold, M., Meyer, U., Kersten, S., Spilke, J., Kramer, R., Jahreis, G., & Dänicke, S. (2013). Effects of conjugated linoleic acids and dietary concentrate proportion on performance, milk composition, milk yield and metabolic parameters of periparturient dairy cows. Archives of Animal Nutrition, 67(3), 185-201. https://doi.org/10.1080/1745039X.2013.793049
Petzold M, et al. Effects of Conjugated Linoleic Acids and Dietary Concentrate Proportion On Performance, Milk Composition, Milk Yield and Metabolic Parameters of Periparturient Dairy Cows. Arch Anim Nutr. 2013;67(3):185-201. PubMed PMID: 23678986.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of conjugated linoleic acids and dietary concentrate proportion on performance, milk composition, milk yield and metabolic parameters of periparturient dairy cows. AU - Petzold,Maria, AU - Meyer,Ulrich, AU - Kersten,Susanne, AU - Spilke,Joachim, AU - Kramer,Ronny, AU - Jahreis,Gerhard, AU - Dänicke,Sven, Y1 - 2013/05/16/ PY - 2013/5/18/entrez PY - 2013/5/18/pubmed PY - 2013/8/9/medline SP - 185 EP - 201 JF - Archives of animal nutrition JO - Arch Anim Nutr VL - 67 IS - 3 N2 - The study aimed to examine effects of supplemented conjugated linoleic acids (CLA) to periparturient cows receiving different concentrate proportions ante partum (a.p.) to investigate CLA effects on lipid mobilisation and metabolism. Compared to adapted feeding, a high-concentrate diet a.p. should induce a ketogenic metabolic situation post partum (p.p.) to better understand how CLA works. Sixty-four pregnant German Holstein cows had ad libitum access to partial mixed rations 3 weeks prior to calving until day 60 p.p. Ante partum, cows received control fat (CON) or a CLA supplement at 100 g/d, either in a low-concentrate (CON-20, CLA-20) or high-concentrate diet (CON-60, CLA-60). Post partum, concentrate proportion was adjusted, while fat supplementation continued. After day 32 p.p., half of the animals of CLA-groups changed to CON supplementation (CLA-20-CON, CLA-60-CON). A ketogenic metabolic situation p.p. was not achieved and therefore impacts of CLA could not be examined. Live weight, milk yield and composition, blood parameters remained unaffected by the treatments. Only a slightly reduced milk fat yield (not significant) was recorded for Group CLA-20. The proportion of trans-10,cis-12 (t10,c12) CLA in milk fat was significantly increased in CLA-groups compared to CON-groups. With the exception of a reversible CLA effect on milk fat in Group CLA-20, no post-treatment effects occurred. Dry matter intake (DMI) of Group CLA-60 was highest before calving, resulting in a significantly improved estimated energy balance after calving. Ante partum, net energy intakes were significantly increased in high-concentrate groups. Overall, supplemented CLA preparation did not relieve metabolism and lipid mobilisation of early lactating cows. But feeding CLA in a high-concentrate diet a.p. seems to increase DMI and thereby improve the energy balance of cows immediately after calving. SN - 1745-039X UR - https://www.unboundmedicine.com/medline/citation/23678986/Effects_of_conjugated_linoleic_acids_and_dietary_concentrate_proportion_on_performance_milk_composition_milk_yield_and_metabolic_parameters_of_periparturient_dairy_cows_ L2 - https://www.tandfonline.com/doi/full/10.1080/1745039X.2013.793049 DB - PRIME DP - Unbound Medicine ER -