کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2454221 | 1110377 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of milk by-products on forage in vitro fermentation by ruminal microflora
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
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چکیده انگلیسی
The effect of milk-based by-products containing lactose and sucrose on alfalfa (ALF) and tall fescue (TF) hay fermentation by ruminal microflora was studied using a single-flow, continuous-culture and batch-culture procedure. Continuous-culture fermentation used only ALF as a forage source and tested buttermilk (BM) and ice cream by-product with cone (ICBPWC). Levels of by-products were 0, 50, and 100% of total DM. For the batch-culture experiment (n = 5) 5 levels of ALF or TF (0, 10, 20, 50, and 75% of DM) were combined with BM, ICBPWC, or ice cream by-product without cone (ICBP). In continuous culture, addition of BM increased apparent OM digestibility and true OM digestibility linearly (P < 0.05), whereas addition of ICBPWC increased true OM digestibility and NDF digestibility linearly (P < 0.05). Total VFA was increased quadratically (P = 0.05) with addition of BM and tended (P = 0.06) to increase linearly with addition of ICBPWC. The addition of BM linearly decreased (P < 0.05) acetate and linearly increased (P < 0.05) butyrate, but propionate levels did not change (P > 0.05). The addition of ICBPWC quadratically decreased (P < 0.05) acetate and quadratically increased (P < 0.05) propionate. The addition of ICBPWC tended (P = 0.09) to quadratically increase grams of microbial N per kilogram of OM truly digested. Dry matter digestibility increased (P < 0.05) linearly in batch culture when by-products were added to both ALF and TF, with DM digestibility response greater (P < 0.05) for TF than for ALF. Addition of milk-based by-products was not detrimental to forage NDF digestibility and increased DM digestibility of the diet.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Professional Animal Scientist - Volume 27, Issue 4, August 2011, Pages 344-351
Journal: The Professional Animal Scientist - Volume 27, Issue 4, August 2011, Pages 344-351
نویسندگان
M.H. Ramos, M.S. Kerley,