Effect of Saccharomyces cerevisiae Association with Threonine on Productive Performance in Broilers

محورهای موضوعی : Camel

م.ف. پرالتا ¹ , آ.ج. نیلسون ² , ر.د. میازو ³

1 - Unidad de Investigación Aviar, Producción Avícola, Facultad de Agronomía y Veterinaria, Universidad Nacional de Rio Cuarto, ruta 36 km 601-Río Cuarto, Córdoba, Argentina
2 - Unidad de Investigación Aviar, Producción Avícola, Facultad de Agronomía y Veterinaria, Universidad Nacional de Rio Cuarto, ruta 36 km 601-Río Cuarto, Córdoba, Argentina
3 - Unidad de Investigación Aviar, Producción Avícola, Facultad de Agronomía y Veterinaria, Universidad Nacional de Rio Cuarto, ruta 36 km 601-Río Cuarto, Córdoba, Argentina

تاریخ دریافت : 1396/07/05 تاریخ پذیرش : 1397/02/10 تاریخ انتشار : 1397/09/10

کلید واژه: broilers, carcass quality, gut histomorphometry, productive parameters, threonine, <i>Saccharomyces cerevisiae</i>,

چکیده مقاله :

The aim was to evaluate the association of Saccharomyces cerevisiae (Sc) with threonine (T), in broiler diets, on performance, carcass quality and gut histomorphometric variables. One hundred Ross male broilers (1 to 43 days old) were distributed into four treatments D1: basal diet (BD), D2: BD plus 5 g Sc/kg feed, D3: BD plus 30% T and D4: D3 plus 5 g Sc/kg feed. Productive variables measured were: average daily weight gain (ADWG) (g/broiler/day), average daily feed consumption (ADFC) (g/broiler/day), and feed conversion ratio (FCR). Also, were determinate: carcass yield (CY) (%), breast weight (BW) (g), thigh weight (TW) (g) and abdominal fat weight (AFW) (g). Moreover, villus height (VH) (µ), crypt depth (CD) (µ), villus area (VA) (µ2) and VH/CD ratio were measured. Results shown that D4 had higher ADWG than D3 group (P≤0.05) and exhibited the best FCR than D2 and D3 group (P≤0.05). Also, D4 had higher BW than D3 group (P≤0.05) and lower AFW than D1 (P≤0.05). The CY and TW were not affected by additives, BW was higher in D4 than D3 group (P≤0.05) and AF was lower in D4 respect to D1 group (P≤0.05). Probiotics decreased VH/CD ratio respect to control (P≤0.05) and VA increased in D4 respect to D1 group (P≤0.05). Also, D3 and D4 group had higher mucus and increased goblet cells numbers. Conclusion: Scassociate with T increase the productive performance of broiler through the healthy gut. Improvement in productive performance would be generated by a better FCR that could be reflex in more efficient use of nutrient that could be translated in better carcass performance (increase muscle deposition and decrease AFW). A healthy gut would be generate by an increase in VA and decrease VH/CD Ratio that could be reflex in enhancing absorptive function by more mature epithelia. Also, mucosal hypersecretion produced by increased goblet cell number could be protected, being the first line of host defense against invading pathogens.

چکیده انگلیسی:

هدف ارزیابی ارتباط مخمر ساکارومایسس سرویزیه (Sc) با ترئونین (T)، در جیره‌های جوجه گوشتی بر روی عملکرد، کیفیت لاشه و تغییرات بافت‌شناسی روده بود. 100 جوجه گوشتی نر Ross (1 تا 43 روزه) در 4 تیمار D1: جیره پایه (BD)، D2: BD به علاوه 5 گرم Sc به ازای هر کیلوگرم خوراک، D3: BD به علاوه 30 درصد T و D4: D3 به علاوه 5 گرم Sc به ازای کیلوگرم خوراک. تغییرات تولیدی اندازه‌گیری شده شامل: متوسط رشد وزنی روزانه (ADWG) (گرم/جوجه/روز)، متوسط مصرف خوراک روزانه (ADFC) (گرم/جوجه/روز)، و نرخ تبدیل خوراک (FCR) بودند. همچنین، بازده لاشه (CY) (%)، وزن سینه (BW) (g)، وزن ران (TW) (g) و وزن چربی شکمی (AFW) (g) تعیین شدند. علاوه بر این، ارتفاع پنجه (VH) (μ)، عمق کریپت (CD) (μ)، منطقه پنجه (VA) (μ2) و نسبت VH/CD اندازه‌گیری شدند. نتایج نشان دادند که D4 بیشترین ADWG را نسبت به گروه D3 (P≤0.05) داشت و بهترین FCR را نسبت به گروه‌های D2 و D3 ارائه داد (P≤0.05). همچنین، D4 بیشترین BW نسبت به گروه D3 (P≤0.05) و کمترین AFW را نسبت به D1 (P≤0.05) داشت. CY و TW توسط افزودنی تحت تاثیر قرار نگرفتند، BW در گروه D4 نسبت به D3 بیشتر بود (P≤0.05) و AF در D4 با توجه به گروه D1 کمتر بود (P≤0.05). پروبیوتیک نسبت VH/CD را با توجه به گروه شاهد کاهش داد (P≤0.05) و VA در D4 با توجه به گروه D1 افزایش یافت (P≤0.05). همچنین، گروه D3 و D4 بیشترین موکوس را داشتند و تعداد سلول‌های گابلت افزایش داشت. در نتیجه پایانی، Sc مرتبط با T عملکرد تولیدی جوجه‌های گوشتی را از طریق سلامت روده افزایش داد. بهبود در عملکرد تولیدی با یک FCR بهتر که می‌تواند در کارایی بیشتر استفاده از مواد مغذی انعکاس یابد و می‌تواند در عملکرد لاشه بهتر تفسیر شود (افزایش رسوب عضلانی و کاهش AFW) تولید خواهد شد. یک روده سالم توسط افزایش در VA و کاهش نسبت VH/CD که می‌تواند انعکاس دهنده در بالا رفتن عملکرد جذب توسط سلول‌های اپیتلیال بالغ بیشتر باشد تولید خواهد شد. همچنین، اولین خط دفاعی میزبان در برابر پاتوژن‌های مهاجم می‌باشد.

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