بررسی پاسخ جوجه‌های گوشتی به استفاده از آنزیم پروتئاز در جیره‌های حاوی سویای پرچرب ‏اکسترودشده در دماهای گوناگون

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، گروه تغذیه دام و طیور، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، ‏گرگان، ایران

2 استاد گروه تغذیه دام و طیور، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران

3 دانشیار، گروه علوم دامی، واحد ورامین- پیشوا، دانشگاه آزاد اسلامی، ورامین، ایران

4 استادیار گروه تغذیه دام و طیور، دانشکده علوم دامی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران

5 استاد، مؤسسه تحقیقات علوم دامی، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران

6 دانش‌آموخته کارشناسی ارشد، واحد علوم و تحقیقات تهران، دانشگاه آزاد اسلامی، تهران، ایران

چکیده

تعداد 1440 قطعه جوجه گوشتی نر سویه راس-308، سن یک تا 42 روزگی در قالب طرح بلوک­های­ کامل تصادفی با هشت تیمار در شش تکرار (30 قطعه در هر تکرار) استفاده شد. تیمارهای آزمایشی شامل جیره­های حاوی صفر (بر پایه کنجاله سویا) و 15 درصد دانه سویای خام، دانه سویای پرچرب اکسترود شده در دمای 90 و 150 درجه سلسیوس با مقادیر صفر و یا 02/0 درصد آنزیم پروتئاز بودند. استفاده از دانه سویای خام موجب کاهش معنی­دار مصرف خوراک، افزایش وزن بدن و وزن نسبی لاشه و همچنین افزایش ضریب تبدیل خوراک و وزن لوزالمعده شد (01/0> P). آنزیم پروتئاز سبب بهبود افزایش وزن در جیره­های حاوی دانه سویای خام شد (01/0> P). ضریب تبدیل خوراک در جیره­های حاوی کنجاله و دانه خام سویا به هنگام استفاده از آنزیم پروتئاز بهبود یافت (01/0> P). دمای اکسترود کردن، شاخص­های عملکرد رشد پرنده‌های آزمایشی را تحت تأثیر قرار نداد. جیره حاوی دانه سویای خام بدون آنزیم، سطح کلسترول خون را افزایش داد (05/0> P). بر اساس نتایج، استفاده از آنزیم پروتئاز در جیره­های حاوی کنجاله سویا یا دانه سویای خام عملکرد جوجه‌های گوشتی را بهبود داد؛ با این وجود، چنین اثری در جیره­های حاوی سویای پرچرب اکسترود شده، کم­رنگ بود.

کلیدواژه‌ها


عنوان مقاله [English]

Investigation on the effects of dietary protease supplementation in broiler diets ‎containing full-fat soybean extruded at different temperatures

نویسندگان [English]

  • Mahmoud Reza Heidari 1
  • Behrouz Dastar 2
  • Seyed Naser Mousavi 3
  • Reza Mirshekar 4
  • Sayed Abdoullah Hosseini 5
  • Majid Abbasi 6
1 Ph.D. Student, Department of Animal and Poultry Nutrition, Faculty of Animal Sciences, Gorgan ‎University of Agricultural Sciences and Natural Resources, Gorgan, Iran
2 Professor, Department of Animal and Poultry Nutrition, Faculty of Animal Sciences, Gorgan University of Agricultural Sciences and ‎Natural Resources, Gorgan, Iran
3 Associate Professor, Department of Animal Science, Varamin-Pishva Branch, Islamic Azad University, Varamin, Iran
4 Assistant Professor, Department of Animal and Poultry Nutrition, Faculty of Animal Sciences, Gorgan University of Agricultural Sciences and ‎Natural Resources, Gorgan, Iran
5 Professor, Animal Science Research Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), ‎Karaj, Iran ‎
6 M.Sc. Graduate, Science and Research Branch, Islamic Azad University, Tehran, Iran
چکیده [English]

For this expriment 1440 Ross 308 male broilers (from 1 to 42 days of age) were used in a randomized complete block design with eight treatments in six blocks. Experimental diets included: soybean meal (control treatment), raw soybeans, full-fat soybeans extruded (15%) at 90 and 150°C, and each of them with 0.02% or without (0.0) protease enzyme supplementation. The use of raw soybean compared to soybean meal or extruded full-fat soybean significantly reduced feed intake, body weight and relative carcass weight, as well as increased feed conversion ratio and pancreatic weight (P<0.01). weight gain was improved in diets supplemented by protease enzyme compared to diets containing raw soybean (P<0.01). Feed conversion ratio was improved in diets containing raw soybean and soy bean meal by dietary protease supplementation (P<0.01). Extrusion temperature did not affect the growth performance of experimental birds. Diet containing raw soybean without enzyme increased blood cholesterol levels (P <0.05). According to the findings of this study, the use of protease enzyme in diets containing soybean meal or raw soybean can improve the performance of broilers However, such effect is less pronounced in diets containing extruded full-fat soybean meal.

کلیدواژه‌ها [English]

  • Performance
  • processing
  • protease enzyme
  • ‎‏ ‏soybean
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