Growth performance, feeding behavior, health status, and blood metabolites of environmentally heat-loaded Holstein dairy calves fed diets supplemented with chromium

Journal of Dairy Science
S KargarM H Ghaffari

Abstract

We investigated the effect of Cr supplementation on growth performance, feeding behavior, health status, and blood metabolites of summer-exposed dairy calves during the pre- and postweaning periods. A total of 24 newborn Holstein female calves (1 d of age; 42.1 ± 0.89 kg of body weight) were assigned randomly to a control group (no Cr supplement; Cr-) or a Cr group (Cr+) receiving 0.05 mg of Cr/kg of body weight0.75. During the study period, the average maximum temperature-humidity index was 81.3 units, indicating a high environmental heat load. Chromium was provided in colostrum and milk during the preweaning period, and in the starter feed during the postweaning period. Calves had free access to fresh water and starter feed throughout the experiment and were weaned on d 63. Starter feed intake and total dry matter intake were greater in Cr+ calves. Despite decreased meal frequency in Cr+ calves, during the preweaning period the starter feed intake increased due to increases in meal duration and meal size and a tendency for greater meal interval. Increased postweaning starter intake in Cr+ calves was attributed to a tendency for an increase in meal duration. Chromium-supplemented calves had greater overall weight gain, but the...Continue Reading

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Jan 19, 2016·Journal of Dairy Science·H BeiranvandM H Ghaffari

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Citations

Apr 23, 2020·Australian Veterinary Journal·A HewittJ I Alawneh
Nov 21, 2020·The Journal of Dairy Research·Mikolt Bakony, Viktor Jurkovich
Dec 23, 2019·The Science of the Total Environment·May Bin-JumahLotfi Aleya
Apr 26, 2021·Environmental Science and Pollution Research International·Mateus Medeiros Dos SantosLeonardo Lelis de Macedo Costa

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