کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10978046 1108054 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Short communication: Measurements of methane emissions from feed samples in filter bags or dispersed in the medium in an in vitro gas production system
ترجمه فارسی عنوان
ارتباطات کوتاه: اندازه گیری انتشار گازهای گلخانه ای از نمونه های خوراکی در کیسه های فیلتر شده و یا در محیطی در یک سیستم تولید گاز در محیط آزمایشگاهی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
چکیده انگلیسی
The objective of this study was to compare methane (CH4) emissions from different feeds when incubated within filter bags for in vitro analysis or directly dispersed in the medium in an automated gas in vitro system. Four different concentrates and 4 forages were used in this study. Two lactating Swedish Red cows were used for the collection of rumen fluid. Feed samples were milled to pass a 1.0-mm screen. Aliquots (0.5 g) of samples were weighed directly in the bottles or within the F 0285 filter bags that were placed in the bottles. Gas samples were taken during 24 and 48 h of incubation, and CH4 concentration was determined. The data were analyzed using a general linear model. Feeds differed significantly in CH4 emission both at 24 and at 48 h of incubation. The interaction between feed and method on methane emission in vitro was significant, indicating that the ranking of feeds was not consistent between the methods. Generally, greater amounts of CH4 were emitted from samples directly dispersed in the medium compared with those incubated within the filter bags, which could be a result of lower microbial activity within the filter bags. The ratio of CH4 to total gas was greater when the feeds were incubated within bags compared with samples directly dispersed in the medium. Incubating samples in filter bags during 48 h of incubation cannot be recommended for determination of CH4 emission of feeds in vitro.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Dairy Science - Volume 96, Issue 7, July 2013, Pages 4643-4646
نویسندگان
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