<abstract xmlns="http://www.w3.org/1999/xhtml">

<sec id="j_jvetres-2019-0059_s_005">
<h3>Introduction</h3>
<p>This study aimed to characterise the effects of ketosis on milk yield and composition and digestive capacity in transition dairy cows.</p>
</sec>
<sec id="j_jvetres-2019-0059_s_006">
<h3>Material and Methods</h3>
<p>Seven ketotic and seven healthy cows were housed in individual stalls for six days. Samples of plasma, milk, refused total mixed ration, and faeces were collected, and the blood biochemical parameters, milk yield and composition, dry matter intake, and faecal dry matter (FDM) production were determined.</p>
</sec>
<sec id="j_jvetres-2019-0059_s_007">
<h3>Results</h3>
<p>Compared with healthy cows, the ketotic cows had significantly higher concentrations of milk fat and citrate, but lower levels of milk protein and lactose. The cows exhibited a need for acid detergent fibre in forage and better digestion of neutral detergent fibre, starch, crude protein, and phosphorus than healthy cows, but more fat and gross energy were excreted in their faeces. Ketotic cows had higher energy-corrected milk yields and lower FDM than healthy cows.</p>
</sec>
<sec id="j_jvetres-2019-0059_s_008">
<h3>Conclusion</h3>
<p>Lower feed intake coinciding with the requirement to maintain high milk production is considered to be the cause of ketosis in dairy cows. Ketotic cows exhibited lower dry matter fat digestion.</p>
</sec>
</abstract>

Introduction
This study aimed to characterise the effects of ketosis on milk yield and composition and digestive capacity in transition dairy cows.


Material and Methods
Seven ketotic and seven healthy cows were housed in individual stalls for six days. Samples of plasma, milk, refused total mixed ration, and faeces were collected, and the blood biochemical parameters, milk yield and composition, dry matter intake, and faecal dry matter (FDM) production were determined.


Results
Compared with healthy cows, the ketotic cows had significantly higher concentrations of milk fat and citrate, but lower levels of milk protein and lactose. The cows exhibited a need for acid detergent fibre in forage and better digestion of neutral detergent fibre, starch, crude protein, and phosphorus than healthy cows, but more fat and gross energy were excreted in their faeces. Ketotic cows had higher energy-corrected milk yields and lower FDM than healthy cows.


Conclusion
Lower feed intake coinciding with the requirement to maintain high milk production is considered to be the cause of ketosis in dairy cows. Ketotic cows exhibited lower dry matter fat digestion.

Effects of ketosis in dairy cows on blood biochemical parameters, milk yield and composition, and digestive capacity

Journal of Veterinary Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Introduction
This study aimed to characterise the effects of ketosis on milk yield and composition and digestive capacity in transition dairy cows.


Material...

Effects of ketosis in dairy cows on blood biochemical parameters, milk yield and composition, and digestive capacity

Publié en ligne: 08 oct. 2019

Pages: 555 - 560

Reçu: 20 févr. 2019

Accepté: 16 sept. 2019

DOI: https://doi.org/10.2478/jvetres-2019-0059

Mots clés
dairy cow, ketosis, milk yield, digestive capacity, dry matter intake

© 2019 W. Yang et al. published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effects of ketosis in dairy cows on blood biochemical parameters, milk yield and composition, and digestive capacity

Publié en ligne: 08 oct. 2019

Pages: 555 - 560

Reçu: 20 févr. 2019

Accepté: 16 sept. 2019

DOI: https://doi.org/10.2478/jvetres-2019-0059

Mots clésdairy cow, ketosis, milk yield, digestive capacity, dry matter intake

© 2019 W. Yang et al. published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
dairy cow, ketosis, milk yield, digestive capacity, dry matter intake