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Influence of Feeding Intensity on Blood Concentrations of Glucose, Ketone Bodies and Free Fatty Acids in Nutritionally Adapted Dairy Cows Fed 24 Times Daily*

Indflydelse af fodringsintensiteten på blodkoncentrationen af glukose, ketonstoffer og frie fedtsyrer hos ernæringsmæssigt veladapterede malkekøer ved høj fodringsfrekvens.

Acta Veterinaria Scandinavica volume 32, pages 301–306 (1991)Cite this article

Abstract

Concentrations of acetoacetate, D-3-hydroxybutyrate, glucose and free fatty acids were determined in blood from 3 Jersey cows during a 5-months period. The cows were fed an identical complete feed every hour, from ad libitum intake to maintenance level, for 28 days at each of the following levels of intake: 170, 138, 102, 53 and 37 g organic matter per kg bodyweight0.75 (metabolic bodyweight). Throughout the experimental period, the cows were in negative energy balance, which was reflected in an average weight loss of 640 g per day. None of the metabolites differed from reference values for healthy lactating cows. The concentration of D-3-hydroxybutyrate decreased linearly with the level of feeding and reflected a decreased ruminai production of butyrate.

The high feeding frequency to lactating cows may be considered an essential factor in the prevention of ketosis.

Sammendrag

Koncentrationen af acetoacetat, D-hydroxybutyrat, glucose og frie fedtsyrer blev analyseret i blod fra tre lakterende jerseykøer, som gennem en 5 måneders periode blev fodret 24 gange i døgnet med samme foderblanding. Hver 28. dag blev foderrationen reduceret fra ad libitum gradvist ned til vedligeholdelsesniveau, hvor køerne blev goldet. Fodringsintensiteter var 170, 138, 102, 53 og 37 g organisk stof pr. kg metabolisk legemsvægt (kg legemsvægt0,75).

Under forsøget var køerne i stor negativ energibalance, idet det totale vægttab udgjorde 24 % svarende til et gennemsnitligt dagligt tab på 640 g. Ingen af de undersøgte metabolitter fandtes under disse omstændigheder afvigende fra referenceværdier hos tilsyneladende sunde og raske malkekøer. D-3-hydroxybutyratkoncentrationen faldt lineært med aftagende ruminal produktion af smørsyre. Undersøgelsen understreger betydningen af høj fodringsfrekvens hos højtydende malkekøer med vægt på forebyggelse af ketotiske tilstande.

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  1. The National Veterinary Laboratory, Copenhagen, and the Division of Animal Nutrition, Department of Animal Science and Animal Health, The Royal Veterinary and Agricultural University, Bülowsvej 27, P. O. Box 373 1503, Copenhagen, Denmark

    Th. Krogh Nielsen & Kurt Jensen

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  1. Th. Krogh Nielsen
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Krogh Nielsen, T., Jensen, K. Influence of Feeding Intensity on Blood Concentrations of Glucose, Ketone Bodies and Free Fatty Acids in Nutritionally Adapted Dairy Cows Fed 24 Times Daily*. Acta Vet Scand 32, 301–306 (1991). https://doi.org/10.1186/BF03546958

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Acta Veterinaria Scandinavica

ISSN: 1751-0147