| Effect of dietary chromium supplementation on productive and reproductive performance of early lactating dairy cows under heat stress. | |
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MedLine Citation:
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PMID: 19906145 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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One hundred and twenty early lactating Holstein dairy cows were assigned to investigate the effect of dietary chromium (Cr) supplementation (0 or 6 mg Cr/head/day from organic preparation) on the productive and reproductive performance as well as on some blood serum parameters under heat stress (35-40 degrees C). Cows received treatment from 3 weeks pre-partum through 12 weeks post-partum. Chromium supplemented diet had lower body weight loss and improved dry matter intake with consequent reduction in the energy balance deficits during the first period after calving when compared with the control group. Chromium supplementation increased (p < 0.05) milk yield by 6.7%, 12.3% and 16.5% at 4, 8 and 12 weeks post-partum, respectively, whereas milk composition and milk to feed ratio were unaffected (p > 0.05) when compared with the control. Moreover, dietary Cr supplementation had no effect (p > 0.05) on blood serum glucose, calcium and phosphorus concentrations. A reduction (p < 0.05) of non-esterified fatty acids at 1 week pre-partum, 2 and 4 weeks post-partum was also observed. Serum insulin concentration increased whereas cortisol concentration decreased, when compared with the control group, throughout the whole experimental period. Also Cr supplementation showed a trend towards improving reproductive performance as indicated by increased percentage of pregnant cows in the first 28 days of breeding. It could be concluded that dietary Cr supplementation at level of 6 mg/head/day may offer a potential protective management practice to lessen the effect of heat stress in dairy cattle. |
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Authors:
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M A Soltan |
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Publication Detail:
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Type: Controlled Clinical Trial; Journal Article Date: 2009-11-11 |
Journal Detail:
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Title: Journal of animal physiology and animal nutrition Volume: 94 ISSN: 1439-0396 ISO Abbreviation: J Anim Physiol Anim Nutr (Berl) Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-05-14 Completed Date: 2010-08-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101126979 Medline TA: J Anim Physiol Anim Nutr (Berl) Country: Germany |
Other Details:
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Languages: eng Pagination: 264-72 Citation Subset: IM |
Affiliation:
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Nutrition and Clinical Nutrition Department, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt. mosaadsoltan@feedco.com.sa |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animal Feed Animal Nutritional Physiological Phenomena Animals Body Weight Cattle / blood, physiology* Chromium / pharmacology* Dairying Diet / veterinary* Dietary Supplements Eating Female Hot Temperature Lactation / drug effects* Pregnancy Reproduction / drug effects* Stress, Physiological |
| Chemical | |
Reg. No./Substance:
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7440-47-3/Chromium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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