کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8492285 | 1552428 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of plant extracts from several tanniferous browse legumes on in vitro microbial fermentation of the tropical grass Pennisetum purpureum
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کلمات کلیدی
ADFomVFAFOMIVOMDPennisetum purpureumNDFomin vitro OM digestibilityVolatile fatty acids - اسیدهای چرب فرارacid detergent fibre - الیاف پاک کننده اسیدAttached bacteria - باکتری های وابستهMicrobial fermentation - تخمیر میکروبیTropical legumes - حبوبات گرمسیریneutral detergent fibre - فیبر مواد شوینده خنثیorganic matter - ماده آلی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
To what extent microbial fermentation of tropical grasses is affected by tannins from browse legumes was studied in vitro using acetone extracts from tanniferous plants in four 48Â h incubation experiments. A proportion of plant extracts equivalent to 240Â mg of Acacia cornigera (AC), Albizia lebbekoides (AL) and Leucaena leucocephala (LL) were added to each bottle with 800Â mg Pennisetum purpureum as substrate, and contrasted with P. purpureum alone (PP) or with 64Â mg quebracho tannins (QT). Gas production was lowest with QT and AL (P<0.05), and AC and LL reduced gas volume compared to PP from 10 to 24Â h (P<0.001) and from 4 to 8Â h (P<0.01), respectively. Compared with PP, total VFA concentration was reduced with AL and QT after 12Â h (P<0.01), and the same trend (P=0.06) occurred with AC and AL after 24Â h. Acetate molar proportion at 24Â h was reduced, and that of propionate increased, with AC and AL compared with PP (P<0.05), whereas AL and QT reduced butyrate proportion (P<0.05). Estimated methane concentration per unit fermented organic matter after 24Â h was lower with AC and AL than with PP (P<0.01). Proportion of R. albus was reduced with LL, AC and AL compared with PP at 12Â h (P<0.01) and 24Â h (P<0.001) of incubation, and the relative concentration of F. succinogenes tended (P=0.08) to be reduced with QT at 12Â h, whereas there was no effect on R. flavefaciens. Plant extracts from A. cornigera, A. lebekkoides and L. leucocephala affected microbial fermentation of the tropical grass P. purpureum, reducing the rate of gas production from 4 to 16Â h and increasing propionate at the expense of acetate, to the largest extent with A. lebbekoides. A reduction of methanogenesis, and therefore an increase in efficiency of energy utilisation, is consequently expected. No major effect on the bacterial population attached to the substrate occurred, but concentrations of R. albus seemed to be sensitive to tannins.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Feed Science and Technology - Volume 168, Issues 3â4, 22 September 2011, Pages 188-195
Journal: Animal Feed Science and Technology - Volume 168, Issues 3â4, 22 September 2011, Pages 188-195
نویسندگان
R. RodrÃguez, A. Britos, N. RodrÃguez-Romero, M. Fondevila,