کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8491207 1552367 2016 39 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparative performance of broiler chickens offered ten equivalent diets based on three grain sorghum varieties as determined by response surface mixture design
ترجمه فارسی عنوان
عملکرد مقایسه ای جوجه های گوشتی 10 رژیم معادل بر اساس سه نوع دانه سورگوم ارائه شده به وسیله طراحی مخلوط سطحی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
چکیده انگلیسی
Ten nutritionally-equivalent diets containing 620 g/kg grain sorghum, based on seven blends and three varieties (Block I, HP, Liberty), were offered to a total of 360 male Ross 308 chicks from 7 to 28 days post-hatch. The effects of dietary treatments on growth performance, nutrient utilisation, starch and protein (Nitrogen) digestibility coefficients, disappearance rates and starch:protein disappearance rate ratios in the distal jejunum and distal ileum were determined. On the basis of response surface contour plots, the optimal weight gain of 1439 g/bird would be generated by a 79.2-20.8 blend of HP and Liberty and the optimal feed conversion ratio (FCR) of 1.486 by a 55.6-44.4 HP-Liberty blend. Similarly, the optimal nitrogen-corrected apparent metabolisable energy (AMEn) of 12.38 MJ would be generated by a 32.0-68.0 blend of HP and Liberty and the optimal apparent metabolisable energy to gross energy (AME:GE) ratio of 0.845 by a 31.1-68.9 HP-Liberty blend. Thus Block I sorghum was effectively rejected. Instructively, Block I contained higher concentrations of kafirin, phenolic compounds and phytate than the two other sorghum varieties. Across the ten diets, sorghum concentrations of these three factors were negatively correlated with AME:GE ratios or efficiency of energy utilisation. These negative linear regressions indicate that all three factors may be contributing to sub-standard starch/energy utilisation in broiler chicks offered sorghum-based diets.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Feed Science and Technology - Volume 218, August 2016, Pages 70-83
نویسندگان
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