کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10980455 | 1108070 | 2011 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Short communication: Evaluation of milk urea nitrogen as a management tool to reduce ammonia emissions from dairy farms
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
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چکیده انگلیسی
The purpose of this study was to compile and evaluate relationships between feed nitrogen (N) intake, milk urea N (MUN), urinary urea N (UUN), and ammonia (NH3) emissions from dairy farms to aid policy development. Regression relationships between MUN, UUN, and NH3 emissions were compiled from studies conducted in Wisconsin, California, and the Netherlands. Relative reductions in NH3 emissions were calculated as percentage decreases in NH3 emissions associated with a baseline MUN level of 14Â mg/dL (prevailing industry average). For 3 studies with cows in stanchion barns, relative NH3 emission reductions of 10.3 to 28.2% were obtained when MUN declined from 14 to 10Â mg/dL. Similarly, analyses of 2 freestall studies provided relative NH3 emission reductions of 10.5 to 33.7% when MUN levels declined from 14 to 10Â mg/dL. The relative reductions in NH3 emissions from both stanchion and freestall barns can be associated directly with reductions in UUN excretion, which can be determined using MUN. The results of this study may help create new awareness, and perhaps eventual industry-based incentives, for management practices that enhance feed N use efficiency and reduce MUN, UUN, and NH3 emissions from dairy farms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Dairy Science - Volume 94, Issue 9, September 2011, Pages 4690-4694
Journal: Journal of Dairy Science - Volume 94, Issue 9, September 2011, Pages 4690-4694
نویسندگان
J.M. Powell, M.A. Wattiaux, G.A. Broderick,