کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5538848 1552357 2017 34 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Increasing dietary levels of citral oil on nutrient total tract digestibility, ruminal fermentation, and milk composition in Saanen goats
ترجمه فارسی عنوان
افزایش سطح رژیم غذایی روغن سیترال بر قابلیت هضم کامل عناصر مغذی، تخمیر شخم و ترکیب شیر در بز زانن
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
چکیده انگلیسی
This study was undertaken to evaluate the effects of increasing dietary doses of high purity citral oil on nutrient total tract digestibility, ruminal fermentation, blood metabolites, milk yield and composition, and N utilization in dairy goats. Twenty-four Saanen goats [62 ± 1.4 kg of body weight (BW), 75 ± 20 days in milk, and 3.0 ± 0.27 kg/d of milk yield, at the start of experiment], being eight of them rumen-cannulated, were used in a 4 × 4 Latin square design experiment with 21-d periods in which the first 14 d were allowed to treatment adaptation. Animals were assigned to the following treatments: control, with no citral supply; and dietary addition of 0.08, 0.16 or 0.24 mL of citral oil per kg of BW. Increasing doses of citral oil did not affect dry matter (DM) and nutrient intake, but it linearly decreased neutral detergent fiber total tract digestion in dairy goats. Treatments neither affected ruminal pH nor NH3N, but citral oil linearly increased butyrate proportion in ruminal fluid of goats. Citral oil consumption had a positive quadratic effect on ruminal propionate (mmol/dL and mmol/100 mmol) and butyrate (mmol/dL) in goats. Treatments had a negative quadratic effect on ruminal acetate to propionate ratio and acetate proportion. Citral consumption by dairy goats linearly decreased blood urea concentration. Although treatments did not affect milk and fat-corrected milk yield, citral oil linearly decreased milk fat production in goats. Citral had no effect on milk fatty acid profile and N utilization in goats. Citral consumption had no effect on DM and nutrient intake as well as on fat-corrected milk yield, but it may increase ruminal propionate concentration in dairy goats.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Feed Science and Technology - Volume 229, July 2017, Pages 47-56
نویسندگان
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