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تعیین احتیاجات اسیدآمینه والین قابل هضم جوجه خروس‌گوشتی سویه راس 308 در دوره رشد با استفاده از مدل خطوط شکسته درجه2 | ||
| علوم دامی | ||
| مقاله 1، دوره 31، شماره 120، آذر 1397، صفحه 3-18 اصل مقاله (1.28 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/asj.2017.114502.1481 | ||
| نویسندگان | ||
| آرش حسن زاد سیدی* 1؛ حسین جانمحمدی2؛ سید علی میرقلنج3؛ مجید قشلاق3 | ||
| 1دانشجوی دکتری گروه علوم دامی دانشکده کشاورزی دانشگاه تبریز | ||
| 2دانشیار گروه علوم دامی دانشگاه تبریز. | ||
| 3استادیار گروه علوم دامی دانشگاه تبریز | ||
| چکیده | ||
| این آزمایش به منظور تعیین احتیاجات اسیدآمینه والین قابل هضم جوجه‌های خروس‌گوشتی سویه راس 308 در دوره رشد انجام گرفت. تعیین احتیاجات اسیدآمینه والین براساس شاخص‌های عملکردی جوجه‌های خروس گوشتی در قالب طرح کاملا تصادفی با450 قطعه جوجه یک روزه از سن 8 تا 21 روزگی در 6 تیمار و 5 تکرار انجام گردید. سطوح افزایشی اسیدآمینه والین به جیره غذایی پایه جهت ایجاد 6 سطح اسیدآمینه والین قابل هضم در دامنه 74/0، 79/0، 84/0، 89/0، 94/0 و 99/0 درصد تامین گردید. نتایج این تحقیق نشان داد که مدل خطوط شکسته غیرخطی درجه 2 برای برآورد احتیاجات والین قابل هضم جوجه‌های گوشتی سویه راس 308 روی داده‌های افزایش وزن، ضریب تبدیل غذایی و وزن سینه برازش داده شد و میزان والین قابل هضم مورد نیاز برای این سه صفت به ترتیب 93/0، 91/0 و 84/0 درصد (نسبت والین به لیزین 88، 86 و79%) جیره غذایی برآورد گردید. میانگین مقادیر شاخص‌های عملکردی و ایمنی سلولی بطور معنی‌داری تحت تاثیر افزودن اسیدآمینه والین قرار گرفت (01/0>P). حداقل مقادیر ضریب تبدیل غذایی (02/0±42/1) وحداکثر پاسخ ایمنی سلولی(05/0±13/1 میلی‌متر) مربوط به سطح 89/0 درصد اسیدآمینه والین بود، همچنین حداکثر مقادیر ضریب تبدیل غذایی (06/0±60/1) وحداقل پاسخ ایمنی سلولی(03/0±44/0 میلی‌متر) مربوط به سطح 74/0 درصد اسیدآمینه والین بود. نتایج این آزمایش نشان داد که میزان احتیاجات اسیدآمینه والین قابل هضم برای حداکثر عملکرد جوجه‌های گوشتی بین 84/0 الی93/0 (نسبت والین به لیزین بین 79/0 الی 88/0) متغیر می‌باشد و در این بازه، میزان تحریک پاسخ ایمنی سلولی در حداکثر مقدار (05/0±13/1 میلی‌متر) خود قرار دارد. | ||
| کلیدواژه‌ها | ||
| ایمنی سلولی؛ والین؛ مدل خطوط شکسته؛ جوجه گوشتی؛ ضریب تبدیل غذایی. | ||
| عنوان مقاله [English] | ||
| Determination of Valine requirement for Ross 308 male broiler chickens in grower period by using quadratic broken line regression | ||
| نویسندگان [English] | ||
| Arash Hassanzadeh seyedi1؛ Hossein Janmohammad2؛ seyed ali Mirghelenj3؛ majeed Geshlag3 | ||
| 1department of animal science, agriculture collage of Tabriz university | ||
| 2Department of animal science, faculty of agriculture, university of tabriz | ||
| 3department | ||
| چکیده [English] | ||
| The aim of this experiment was to determine the digestible valine requirement of male Ross 308 broiler chicks in grower period. To evaluate valine requirement of male broiler chicks based on growth performance, a total of 450one day old male broiler chicks from8 to 21days of age, was assigned to 6 treatments with 5 replicate using a completely randomized design. Dietary valine was supplied in 6 levels from 0.74, 0.79, 0.84, 0.89, 0.94 and 0.99for the experimental period. Results of this study showed that the quadratic broken line model were used for determine of digestible valine requirement for Ross 308 male broiler chicks is the well fitted base on weight gain, feed conversion ratio and breast weight and Evaluated digestible valine content for these three performance parameters were 0.93, 0.91 and 0.84 % of diet (Val/lys were 88, 86 and 79%), respectively. The result of this experiment showed that the all performance parameters and cell modified immune response were significantly affected by the valine supplementation in diet (P< 0.01). The broiler chickens fed with 0.89 % of digestible valine level had the highest cell modified immune response (1.13±0.05 mm) and the lowest feed conversion ratio (1.42±0.02) (P<0.01), and also The broiler chickens fed with 0.74 % of digestible valine level had the lowest cell modified immune response (0.44±0.03 mm) and the highest feed conversion ratio (1.60±0.06). | ||
| کلیدواژه‌ها [English] | ||
| Broken Line Model, Broiler chick, Feed Conversion Ratio, cell modified immune, Valine. | ||
| مراجع | ||
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