Milk fatty acid composition as an indicator of energy status in Holstein dairy cows
Transition dairy cows often enter a stage of negative energy balance during which the utilization of energy reserves is reflected in the milk fatty acid (FA) composition. In this study, metabolic status was evaluated by measuring milk FA, ruminal short-chain FA (RSCFA), and serum biochemical para...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2017-07-01
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| Series: | Archives Animal Breeding |
| Online Access: | https://www.arch-anim-breed.net/60/205/2017/aab-60-205-2017.pdf |
| _version_ | 1819160362293919744 |
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| author | L. Vranković J. Aladrović D. Octenjak D. Bijelić L. Cvetnić Z. Stojević |
| author_facet | L. Vranković J. Aladrović D. Octenjak D. Bijelić L. Cvetnić Z. Stojević |
| author_sort | L. Vranković |
| collection | DOAJ |
| description | Transition dairy cows often enter a stage of negative energy balance during
which the utilization of energy reserves is reflected in the milk fatty acid
(FA) composition. In this study, metabolic status was evaluated by measuring
milk FA, ruminal short-chain FA (RSCFA), and serum biochemical parameters in
Holstein cows. Samples (milk, rumen contents, and blood) were collected
around days 30 (early) and 150 (middle) of lactation, and rumen contents and
blood samples were collected 30 days before calving (dry). Fatty acids were
extracted and FA composition was determined. Glucose, triacylglycerols, total
cholesterol, low-density lipoprotein cholesterol (LDL-C) and high-density
lipoprotein cholesterol (HDL-C), beta-hydroxybutyric acid (BHB), and
non-esterified fatty acid (NEFA) concentrations were determined in serum
samples. Lower percentages of saturated FA in milk and higher percentages of
monounsaturated FA, polyunsaturated FA, and C18:1n-9 were observed in early
lactation compared to mid-lactation. In rumen higher concentrations of
propionic acid were determined at mid-lactation compared to early lactation.
Acetic and butyric acid concentrations showed no significant differences
between sampling intervals. In serum higher glucose concentrations were
observed during the dry period and mid-lactation than during early lactation.
Lower BHB and higher NEFA concentrations were noted during early lactation
compared to mid-lactation and the dry period. Total cholesterol, LDL-C, HDL-C
and triacylglycerols showed no significant differences between sampling
intervals. The results of the present study suggest that determination of
milk FA is a potential indicator of energy status in dairy cows. |
| first_indexed | 2024-12-22T16:55:14Z |
| format | Article |
| id | doaj.art-4269d7e6393b4478ab319fcd61937409 |
| institution | Directory Open Access Journal |
| issn | 0003-9438 2363-9822 |
| language | English |
| last_indexed | 2024-12-22T16:55:14Z |
| publishDate | 2017-07-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Archives Animal Breeding |
| spelling | doaj.art-4269d7e6393b4478ab319fcd619374092022-12-21T18:19:28ZengCopernicus PublicationsArchives Animal Breeding0003-94382363-98222017-07-016020521210.5194/aab-60-205-2017Milk fatty acid composition as an indicator of energy status in Holstein dairy cowsL. Vranković0J. Aladrović1D. Octenjak2D. Bijelić3L. Cvetnić4Z. Stojević5Department of Physiology and Radiobiology, University of Zagreb Faculty of Veterinary Medicine, Heinzelova 55, 10000 Zagreb, CroatiaDepartment of Physiology and Radiobiology, University of Zagreb Faculty of Veterinary Medicine, Heinzelova 55, 10000 Zagreb, CroatiaStudents of Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10000 Zagreb, CroatiaStudents of Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10000 Zagreb, CroatiaStudents of Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10000 Zagreb, CroatiaDepartment of Physiology and Radiobiology, University of Zagreb Faculty of Veterinary Medicine, Heinzelova 55, 10000 Zagreb, CroatiaTransition dairy cows often enter a stage of negative energy balance during which the utilization of energy reserves is reflected in the milk fatty acid (FA) composition. In this study, metabolic status was evaluated by measuring milk FA, ruminal short-chain FA (RSCFA), and serum biochemical parameters in Holstein cows. Samples (milk, rumen contents, and blood) were collected around days 30 (early) and 150 (middle) of lactation, and rumen contents and blood samples were collected 30 days before calving (dry). Fatty acids were extracted and FA composition was determined. Glucose, triacylglycerols, total cholesterol, low-density lipoprotein cholesterol (LDL-C) and high-density lipoprotein cholesterol (HDL-C), beta-hydroxybutyric acid (BHB), and non-esterified fatty acid (NEFA) concentrations were determined in serum samples. Lower percentages of saturated FA in milk and higher percentages of monounsaturated FA, polyunsaturated FA, and C18:1n-9 were observed in early lactation compared to mid-lactation. In rumen higher concentrations of propionic acid were determined at mid-lactation compared to early lactation. Acetic and butyric acid concentrations showed no significant differences between sampling intervals. In serum higher glucose concentrations were observed during the dry period and mid-lactation than during early lactation. Lower BHB and higher NEFA concentrations were noted during early lactation compared to mid-lactation and the dry period. Total cholesterol, LDL-C, HDL-C and triacylglycerols showed no significant differences between sampling intervals. The results of the present study suggest that determination of milk FA is a potential indicator of energy status in dairy cows.https://www.arch-anim-breed.net/60/205/2017/aab-60-205-2017.pdf |
| spellingShingle | L. Vranković J. Aladrović D. Octenjak D. Bijelić L. Cvetnić Z. Stojević Milk fatty acid composition as an indicator of energy status in Holstein dairy cows Archives Animal Breeding |
| title | Milk fatty acid composition as an indicator of energy status in Holstein dairy cows |
| title_full | Milk fatty acid composition as an indicator of energy status in Holstein dairy cows |
| title_fullStr | Milk fatty acid composition as an indicator of energy status in Holstein dairy cows |
| title_full_unstemmed | Milk fatty acid composition as an indicator of energy status in Holstein dairy cows |
| title_short | Milk fatty acid composition as an indicator of energy status in Holstein dairy cows |
| title_sort | milk fatty acid composition as an indicator of energy status in holstein dairy cows |
| url | https://www.arch-anim-breed.net/60/205/2017/aab-60-205-2017.pdf |
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