1دانشجوی کارشناسی ارشد، گروه علوم دامی، دانشکده کشاورزی، دانشگاه جیرفت، جیرفت، ایران.
2دانشیار، گروه علوم دامی، دانشکده کشاورزی، دانشگاه جیرفت، جیرفت، ایران.
3دانشیار، گروه علوم دامی، دانشکده کشاورزی، دانشگاه جیرفت، جیرفت، ایران. دانشیار، گروه مهندسی طبیعت، مجتمع آموزش‌عالی شیروان، شیروان، ایران.
چکیده
این آزمایش به‌منظور بررسی تأثیر پودر میوه عناب و سنجد بر عملکرد رشد، متابولیت‌های خونی و کیفیت گوشت جوجه‌های گوشتی در شرایط دمایی بالا روی 160 قطعه جوجه گوشتی نر یک روزه سویه راس 308 در قالب طرح کاملاً تصادفی با چهار تیمار و چهار تکرار و تعداد 10 پرنده در هر تکرار انجام شد. تیمارهای آزمایشی عبارت بود از 1- شاهد (جیره پایه)، 2- جیره پایه+ 75/0 درصد پودر میوه عناب، 3- جیره پایه+ 0/75 درصد پودر میوه سنجد و 4- جیره پایه+ ترکیب پودر میوه عناب و سنجد (هرکدام0/75 درصد). در سن 25 روزگی و با شروع تنش گرمایی، جوجه‌ها روزانه هشت ساعت از ساعت نه تا 17 در دمای 2±34 درجه سانتیگراد قرار گرفتند. نتایج نشان داد که اثر تیمارها بر صفات عملکردی معنی‌دار نبود . هم‌چنین وزن نسبی لاشه و اندام‌های داخلی به جز کبد، تحت تأثیر تیمارهای آزمایشی قرار نگرفت. کم‌ترین وزن نسبی کبد در گروه شاهد مشاهده شد (P≤0/05). افزودن پودر میوه عناب و سنجد سبب افزایش معنی‌دار میزان گلوتاتیون پراکسیداز و کاهش غلظت گلوکز خون در مقایسه با گروه شاهد شد (P≤0/05). بیش‌ترین ظرفیت نگهداری آب و کم‌ترین افت پخت و خونابه در جوجه‌های گوشتی تغذیه‌شده با عناب و سنجد به‌دست آمد (P≤0/05). با توجه به نتایج حاصل از این آزمایش، افزودن عناب و سنجد در سطح 0/75درصد جیره در شرایط تنش گرمایی هرچند که بر صفات عملکردی جوجه‌های گوشتی مؤثر نبود، اما منجر به بهبود متابولیت‌های خونی و صفات کیفی گوشت شد.
Effect of Zizyphus jujube and Elaeagnus angustifolia powder on growth performance, blood metabolites and meat quality of broiler chickens under high temperature conditions
1Department of Animal Sciences, Faculty of Agriculture, University of Jiroft, Kerman, Iran.
2Associate Professor of poultry nutrition/Animal Science Department, University of Jiroft
31- Department of Animal Sciences, Faculty of Agriculture, University of Jiroft, Kerman, Iran.
2- Department of Plant Production, Higher Education Complex of Shirvan, Shirvan, Iran
چکیده [English]
This experiment was performed to investigate the effects of Ziziphus jujube and Elaeagnus angustifolia powder on growth performance, blood metabolites and meat quality of broiler chickens at high temperature conditions. In this experiment, 160 one-day-old male broiler chickens of Ross 308 were used in a completely randomized design with 4 treatments and 4 replicates of 10 birds per each. Experimental treatments were including: 1- control (basal diet), 2- basal diet + 0.75% Ziziphus jujube, 3- basal diet + 0.75% Elaeagnus angustifolia powder, and 4- basal diet + combination of Ziziphus jujubeand Elaeagnus angustifolia powder (0.75% of each). At day 25 of age, with the onset of heat stress, the chicks were exposed to 34±2 ° C for eight hours daily from 9 a.m. to 5 p.m. The results showed that the effect of treatments on growth performance traits was not significant (P≥0.05). Also, the relative weight of carcasses and internal organs except liver were not affected by experimental treatments. The lowest relative liver weight was observed in the control group (P≤0.05). The addition of Ziziphus jujube and Elaeagnus angustifolia in the diet significantly increased glutathione peroxidase and decreased blood glucose compared to the control group (P≤0.05). The highest amount of water holding capacity and lowest dripping loss and cooking loss were observed in birds fed Ziziphus jujube mill and Elaeagnus angustifolia (P≤0.05). Based on the results of the current experiment, although the inclusion of 0.75% of Ziziphus jujube and Elaeagnus angustifolia had no effect on growth performance of broiler chicken, but improved blood metabolites and meat quality traits.
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