کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8490936 | 1552345 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of concentrate feeding level on methane emissions, production performance and rumen fermentation of Jersey cows grazing ryegrass pasture during spring
ترجمه فارسی عنوان
اثر سطوح تغذیه کنسانتره بر انتشار گازهای گلخانه ای، عملکرد تولید و تخمیر شکماری گاوهای یخی گاو شیری ریزی در فصل بهار
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کلمات کلیدی
ECMNIWANDFMethane mitigationCH4SCCMUNVFAOMDFCMDMISF6iNDF - IndfDIM - اذعانvolatile fatty acid - اسید چرب فرارenergy corrected milk - انرژی تصحیح شیرmetabolisable energy - انرژی قابل متابولیسمgross energy - انرژی ناخالصSomatic cell count - تعداد سلول های سوماتیکFaecal output - خروجی فکdays in milk - روز در شیرBCs - روند BCsPerennial ryegrass - ریشه چند سالهindigestible neutral detergent fibre - فیبر مواد شوینده بی حس کنندهneutral detergent fibre - فیبر مواد شوینده خنثیdry matter - ماده خشکPasture-based - مبتنی بر مرتعMethane - متان dry matter intake - مصرف ماده خشکBody condition score - نمره وضعیت بدنMilk urea nitrogen - نیتروژن اورهIn vitro organic matter digestibility - هضم ماده آلی درون in vitroSulphur hexafluoride - هگزافلورید سولفوریکcrude protein - پروتئین خامfat corrected milk - چربی اصلاح شده شیر
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
چکیده انگلیسی
Dietary supplementation has been well documented as an effective enteric methane (CH4) mitigation strategy. However, limited studies have demonstrated the effect of concentrate level on enteric CH4 emissions from grazing dairy cows, and to our knowledge none of these studies included a pasture-only diet or reported on rumen fermentation measures. Sixty multiparous (4.0â¯Â±â¯1.51 SD) Jersey cows, of which six were rumen-cannulated, were used in a randomised complete block design, and the cannulated cows were used in a separate replicated 3â¯Ãâ¯3 Latin square design, to investigate the effect of concentrate supplementation (0, 4, and 8â¯kg/cow per day; as fed) on enteric CH4 emissions, milk production, dry matter intake (DMI), and rumen fermentation of dairy cows grazing perennial ryegrass pasture during spring, following a 14-d adaptation period. The sulphur hexafluoride tracer gas technique was used to measure enteric CH4 emissions from 10 cows of each treatment group over a single 9-d measurement period. Parallel with the CH4 measurement period, pasture DMI was determined using TiO2 and indigestible neutral detergent fibre as external and internal markers, respectively, while milk yield, milk composition, cow condition, and pasture pre- and post-grazing measurements were also recorded. Total DMI (13.4 to 18.0â¯kg/d), milk yield (12.9â¯to 19.2â¯kg/d), energy corrected milk (14.6 to 20.7â¯kg/d), milk lactose content (46.2 to 48.1â¯g/kg) and gross energy intake (239â¯to 316â¯MJ/d) increased, while milk fat content (50.0 to 44.2â¯g/kg) decreased with increasing concentrate feeding level. Volatile fatty acid concentrations and ruminal pH were mostly unaffected by treatment, while dry matter disappearance decreased and NH3-N concentration increased with increasing concentrate feeding level. Methane production (258 to 302â¯g/d) and CH4 yield (20.6 to 16.9â¯g/kg of DMI) were similar for all cows, while pasture DMI (13.4 to 10.8â¯kg/d) and CH4 intensity (20.4 to 15.9â¯g of CH4/kg of milk yield) decreased linearly with increasing concentrate feeding level. Results indicate that concentrate supplementation on high quality pasture-only diets have the potential to effectively reduce CH4 emissions per unit of milk yield from grazing cows during spring.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Feed Science and Technology - Volume 241, July 2018, Pages 121-132
Journal: Animal Feed Science and Technology - Volume 241, July 2018, Pages 121-132
نویسندگان
J.D.V. van Wyngaard, R. Meeske, L.J. Erasmus,