کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8492239 | 1552426 | 2011 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Production performance and milk composition of grazing dairy cows fed pelleted or non-pelleted concentrates treated with or without lignosulfonate and containing ground sunflower seeds
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کلمات کلیدی
ADFCLASSCPECOaNDFVFATTADconjugated linoleic acid - اسید لینولئیک کونژوگهFatty acid - اسید چربVolatile fatty acids - اسیدهای چرب فرارacid detergent fiber - الیاف پاک کننده اسیدSomatic cell count - تعداد سلول های سوماتیکMilk production - تولید شیرether extract - عصاره اترneutral detergent fiber - فیبر مواد شوینده خنثیdry matter - ماده خشکtotal tract apparent digestibility - هضم ظاهری کل دستگاهbody weight - وزن بدنcrude protein - پروتئین خامDairy cow - گاو شیریSunflower - گل آفتابگردانPellet - گلوله
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Effects of feeding supplements which contained ground sunflower seeds in a pelleted versus non-pelleted concentrate treated with, or without, 50 g/kg lignosulfonate were evaluated in 8 multiparous Holstein cows under grazing conditions. Cows were assigned to a double 4 Ã 4 Latin square design experiment with four 21 d experimental periods. Whole diet total tract apparent digestibility, dry matter (DM) intake, milk production, milk composition, ruminal fermentation characteristics and milk fatty acid profile were determined. At the beginning of the experiment, cows were 556 ± 39.8 kg of body weight and 100 ± 62.6 d in milk. There was no interaction between pelleting and lignosulfonate for any parameter studied. Lignosulfonate and pelleting had no effect on DM intake (i.e., concentrate + pasture) and lignosulfonate had no effect on nutrient intakes (i.e., concentrate + pasture). Intake (i.e., concentrate + pasture) of ether extract was lower for cows fed pelleted than for those fed non-pelleted concentrates, but there was no difference among treatments in total intake of other nutrients. Pelleting had no effect on digestibility, but decreased milk fat concentration. Milk production, milk concentrations of crude protein, lactose and total solids, and milk yields of crude protein and fat were similar among treatments. Pelleting had more effects than lignosulfonate treatment on milk fatty acid profiles, with concentrations of trans11-18:1 and conjugated linoleic acid (CLA) being, respectively, 178% and 200% of those found in milk fat of cows fed non-pelleted concentrates. Pelleting may improve the nutritional value of concentrates containing ground sunflower seeds as a source of CLA precursors in milk fat of grazing dairy cows. However, there was no positive additive or synergistic effect between lignosulfonate treatment and pelleting.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Feed Science and Technology - Volume 169, Issues 3â4, 3 November 2011, Pages 167-175
Journal: Animal Feed Science and Technology - Volume 169, Issues 3â4, 3 November 2011, Pages 167-175
نویسندگان
W.B.R. dos Santos, G.T.D. Santos, D.C. da Silva-Kazama, U. Cecato, F.E. de Marchi, J.V. Visentainer, H.V. Petit,