کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2458435 1554425 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of sodium bicarbonate and yeast on nutrient intake, digestibility, and ruminal fermentation of light-weight lambs fed finishing diets
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Effects of sodium bicarbonate and yeast on nutrient intake, digestibility, and ruminal fermentation of light-weight lambs fed finishing diets
چکیده انگلیسی

This study was conducted to determine the effects of adding yeast culture and sodium bicarbonate to the finishing diets for lambs on intake, digestibility, rumina1 parameters and nitrogen retention. Twenty Pelibuey male lambs, weighing an average of 23 kg, were assigned to one of four treatment groups according to a completely randomized design with a 2 × 2 factorial arrangement. Treatments were: (1) no additive (NA); (2) 0.12% yeast culture (YC); (3) 0.5% sodium bicarbonate (SB); and (4) 0.12% YC and 0.5% SB. During the 7-day collection period, SB increased DM intake (P < 0.05), while YC had no effect (P > 0.05) on intake. Intake of non-fibrous carbohydrates (NFC) was increased (P < 0.05) with SB in the ration, but not by supplementing YC (P > 0.05). The YC had no effect (P > 0.05) on dry matter (DM), neutral detergent fiber (NDF) or non-fibrous carbohydrates digestibility. A higher intake of NFC with the SB treatments was associated with a lower (P < 0.05) digestibility. SB increased excretion of NDF (P < 0.05), which reduced its digestibility (P < 0.05) by more than 9 percentage units. Lambs consuming diets with SB had 27% more N retained, in contrast with those fed the basal diet without additives. Rumen pH was greater than the minimum considered to cause acidosis (≤pH 5.5). The SB reduced (P < 0.05) percent molar acetate and increased (P < 0.05) percent molar propionate, which is in contrast to what has been normally observed with dairy cattle research. A lower acetate to propionate ratio with the SB rations may be a result of a lower digestibility and a higher intake of NDF, which may have increased the rate of passage of fiber particles through the gastrointestinal tract.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Small Ruminant Research - Volume 67, Issues 2–3, February 2007, Pages 149–156
نویسندگان
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