کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8490980 | 1552347 | 2018 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The interactive influence of dietary nutrient density and feed form on the performance of broiler chickens
ترجمه فارسی عنوان
اثر تعاملی چگالی مواد غذایی رژیم غذایی و فرم تغذیه بر عملکرد جوجه های گوشتی
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کلمات کلیدی
F/GAMECAIDAMEnamino acid - آمینو اسیدapparent metabolisable energy - انرژی قابل متابولیسم ظاهریgross energy - انرژی ناخالصNutrient density - تراکم مواد مغذیTitanium - تیتانیومBroilers - جوجههای گوشتیcoefficient of apparent ileal digestibility - ضریب هضم ظاهری ایلئالFeed form - فرم خوراکPhosphorus - فسفرdry matter - ماده خشکFeed intake - مصرف غذاNitrogen - نیتروژنNutrient digestibility - هضم مواد مغذیbody weight - وزن بدنPerformance - کاراییCalcium - کلسیم
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم دامی و جانورشناسی
چکیده انگلیسی
The present study investigates the interactions between dietary nutrient density and feed form on the growth performance, coefficient of apparent ileal digestibility (CAID) of dry matter (DM), nitrogen (N), starch, fat, calcium (Ca) and phosphorus (P), and N-corrected apparent metabolisable energy (AMEn) in broiler chickens to 21d post-hatch. Maize-soybean meal diets with five tiers of nutrient density were formulated and mixed. The diets were then divided into two equal batches; the first batch was offered as unprocessed mash and the second batch was steam-pelleted at a conditioning temperature of 75â¯Â°C. A 5â¯Ãâ¯2 factorial array of ten dietary treatments were offered to a total of 480, day-old male broiler (Ross 308) chicks accommodated in 60 cages (eight birds per cage). Significant (Pâ¯<â¯0.001) interactions between nutrient density and feed form were observed for weight gain, feed intake and feed per unit gain. While birds fed pelleted diets outperformed those fed mash diets at each nutrient density level, the pellet-associated benefits were more pronounced at the lowest nutrient density. Increasing nutrient density increased (Pâ¯<â¯0.001) N digestibility from 0.772 to 0.811, but decreased (Pâ¯<â¯0.001) that of starch from 0.969 in very low density diets to 0.943 in very high density diets. No significant (Pâ¯>â¯0.05) effect of nutrient density on the CAID of DM and fat was found. Feeding pelleted diets, regardless of nutrient density, reduced (Pâ¯<â¯0.001) the CAID of DM, N, starch and fat. Significant nutrient densityâ¯Ãâ¯feed form interactions were observed for the CAID of Ca (Pâ¯<â¯0.001) and P (Pâ¯<â¯0.01). Pelleting enhanced (Pâ¯<â¯0.05) the CAID of Ca and P in the diet with lowest nutrient density but reduced (Pâ¯<â¯0.05) the digestibility of these minerals in all other nutrient density diets. Increasing dietary nutrient density progressively increased the AMEn, but feeding of pelleted diets, regardless of nutrient density, reduced (Pâ¯<â¯0.001) the AMEn. Overall, the present data showed that the magnitude of pelleting-induced benefits on broiler performance varied depending on dietary nutrient density, with responses to pelleting decreasing with increasing dietary nutrient density. The present study highlights that dietary nutrient density must be taken into consideration if the full benefits associated with feeding pelleted diets are to be achieved.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Feed Science and Technology - Volume 239, May 2018, Pages 33-43
Journal: Animal Feed Science and Technology - Volume 239, May 2018, Pages 33-43
نویسندگان
M.R. Abdollahi, F. Zaefarian, V. Ravindran, P.H. Selle,