| Effect of dietary crude protein modification on ammonia and nitrous oxide concentration on a tie-stall dairy barn floor. | |
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MedLine Citation:
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PMID: 20630233 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Dietary crude protein (CP) reduction is considered a useful strategy to minimize cow N excretion and NH(3) and N(2)O emissions. The aim of the current work was to relate dietary CP modification to whole-animal N balance and subsequent NH(3) and N(2)O concentrations on a tie-stall barn floor. The effect of temperature on NH(3) and N(2)O concentration was also studied. Three Holstein mid to late lactating cows were confined in separate tie-stalls and randomly assigned to 3 diets with varying CP content [low CP (LCP): 14.1%; moderate CP (MCP): 15.9%; high CP (HCP): 16.9%]. Increasing N intake (from 438.6 to 522.8 g of N/d) improved milk yield (from 22.1 to 24.2 kg/d). However, N use efficiency tended to decrease with increasing dietary CP, as shown by milk N use efficiency (from 23.9 to 22.6%), milk urea N (from 15.4 to 18.7 mg/dL), and excreted N per milk yield unit (from 14.7 to 16.4 g of N/kg of milk). Because of higher N excretion, NH(3) concentration on the dairy barn floor increased (LCP: 7.1mg of NH(3)/m(3); MCP: 10.4 mg of NH(3)/m(3); HCP: 10.8 mg of NH(3)/m(3)). In contrast, N(2)O concentration did not respond to dietary manipulation (mean 1.1mg of N(2)O/m(3)). Temperature, which ranged between 12.6 and 18.0 degrees C, did not affect NH(3) and N(2)O concentrations at the stall level. However, when fecal and urinary samples were incubated at 4, 19, and 29 degrees C in the laboratory, ammonia concentration increased for all diets, especially for the MCP and HCP diets, as the temperature increased. In contrast, N2O concentration was negatively related to increasing temperature. In conclusion, data from the current trial demonstrate that lowering dietary CP minimizes NH(3) concentration on dairy stall floors although temperature controls the rate of NH(3) volatilization. On the other hand, N(2)O concentration is not affected by dietary treatments on tie-stall floors. |
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Authors:
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H Arriaga; G Salcedo; L Martínez-Suller; S Calsamiglia; P Merino |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of dairy science Volume: 93 ISSN: 1525-3198 ISO Abbreviation: J. Dairy Sci. Publication Date: 2010 Jul |
Date Detail:
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Created Date: 2010-07-15 Completed Date: 2010-12-14 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2985126R Medline TA: J Dairy Sci Country: United States |
Other Details:
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Languages: eng Pagination: 3158-65 Citation Subset: IM |
Copyright Information:
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Copyright (c) 2010 American Dairy Science Association. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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NEIKER-Tecnalia, Department of Ecotechnologies, 48160 Derio (The Basque Country), Spain. harriaga@neiker.net |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Ammonia
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analysis* Animals Cattle / metabolism, physiology* Dairying Diet / veterinary* Dietary Proteins / administration & dosage* Feces / chemistry* Female Housing, Animal Lactation / physiology Milk / chemistry, secretion Nitrogen / metabolism Nitrous Oxide / analysis* Random Allocation Temperature Urine / chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Dietary Proteins; 10024-97-2/Nitrous Oxide; 7664-41-7/Ammonia; 7727-37-9/Nitrogen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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