دورية أكاديمية
Nitrogen partitioning and milk production of dairy cows grazing simple and diverse pastures
| العنوان: | Nitrogen partitioning and milk production of dairy cows grazing simple and diverse pastures |
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| المؤلفون: | Totty, VK, Greenwood, SL, Bryant, Racheal, Edwards, GR |
| بيانات النشر: | Elsevier on behalf of the American Dairy Science Association |
| سنة النشر: | 2013 |
| المجموعة: | Lincoln University (New Zealand): Lincoln U Research Archive |
| مصطلحات موضوعية: | nitrogen partitioning, milk yield, pasture species, dairy cow, ANZSRC::3003 Animal production, ANZSRC::3006 Food sciences, ANZSRC::3009 Veterinary sciences, Milk, Feces, Animals, Cattle, Melilotus, Lolium, Nitrogen, Urea, Creatinine, Diet, Lactation, Dairying, Female |
| جغرافية الموضوع: | United States |
| الوصف: | Research was conducted to examine the effects of a diverse pasture mix on dry matter intake, milk yield, and N partitioning of lactating dairy cows. A pasture containing only ryegrass and white clover (RG), or high sugar ryegrass and white clover (HS), was compared with a diverse pasture mix (HSD) including chicory, plantain, lotus, high-sugar ryegrass, and white clover. The experiment was conducted over a 10-d period using 3 groups of 12 cows in late lactation. No difference was observed in dry matter (14.3 kg of dry matter/cow per day) or N (583 g of N/cow per day) intake between treatments. The cows grazing the HSD pasture had an increased milk yield (16.9 kg/d) compared with those grazing the simple RG and HS pastures (15.2 and 14.7 kg/d, respectively). However, no differences were observed in milk solids yield for the 3 treatments. A tendency toward greater milk protein yields in the HSD group resulted in improved N use efficiency for milk of 20.4% from the cows fed HSD, compared with 17.8 and 16.7% from cows in the RG and HS treatments, respectively. Urinary N excretion was lower from the cows fed HSD, at 353.8 g/d, compared with 438.3 and 426.6 g/d for cows fed RG and HS, respectively. These results suggest that the use of pastures containing chicory, lotus, and plantain can contribute to the goal of reducing N losses from cows in late lactation. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | pp.141-149; Print-Electronic |
| اللغة: | English |
| تدمد: | 1525-3198 0022-0302 |
| العلاقة: | The original publication is available from Elsevier on behalf of the American Dairy Science Association - https://doi.org/10.3168/jds.2012-5504Test - http://dx.doi.org/10.3168/jds.2012-5504Test; Journal of Dairy Science; https://doi.org/10.3168/jds.2012-5504Test; S0022-0302(12)00839-9; https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=elements_prod&SrcAuth=WosAPI&KeyUT=WOS:000312524300017&DestLinkType=FullRecord&DestApp=WOS_CPLTest; Totty, V.K., Greenwood, S.L., Bryant, R.H. & Edwards, G.R. (2013). Nitrogen partitioning and milk production of dairy cows grazing simple and diverse pastures. Journal of Dairy Science, 96(1), 141-149. DOI:https://doi.org/10.3168/jds.2012-5504Test; 23164232 (pubmed); https://hdl.handle.net/10182/7454Test |
| DOI: | 10.3168/jds.2012-5504 |
| الإتاحة: | https://doi.org/10.3168/jds.2012-5504Test https://hdl.handle.net/10182/7454Test https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=elements_prod&SrcAuth=WosAPI&KeyUT=WOS:000312524300017&DestLinkType=FullRecord&DestApp=WOS_CPLTest |
| حقوق: | Copyright © 2016 Elsevier B.V. |
| رقم الانضمام: | edsbas.E4D6F095 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 15253198 00220302 |
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| DOI: | 10.3168/jds.2012-5504 |