Research on Animal Production

fa تأثیر استفاده از ترکیب فیتاز و سین‌بیوتیک در جیره با کمبود فسفر بر عملکرد و فراسنجه‌های خونی جوجه‌های گوشتی The Effect of using a Combination of Phytase and Synbiotic in a Phosphorus Deficient Diet on the Performance and Blood Parameters of Broiler Chickens تغذیه طیور تغذیه طیور پژوهشي Research <div style="text-align: justify;">چکیده مبسوط مقدمه و هدف: با افزایش هزینه‌های تغذیه و نگرانی‌ها از آلودگی‌های زیست &lrm;محیطی ناشی از دفع ازت و فسفر، یافتن راه کارهایی برای افزایش زیست فراهمی مواد مغذی از جمله فسفر بسیار مورد توجه قرار گرفته است. هدف از این آزمایش بررسی تأثیر ترکیب فیتاز و سین‌بیوتیک در جیره‌هایی با کمبود فسفر بر عملکرد جوجه‌های گوشتی<v:group coordsize="5397,2794" id="Group_x0020_13" o:gfxdata="UEsDBBQABgAIAAAAIQC75UiUBQEAAB4CAAATAAAAW0NvbnRlbnRfVHlwZXNdLnhtbKSRvU7DMBSF dyTewfKKEqcMCKEmHfgZgaE8wMW+SSwc27JvS/v23KTJgkoXFsu+P+c7Ol5vDoMTe0zZBl/LVVlJ gV4HY31Xy4/tS3EvRSbwBlzwWMsjZrlprq/W22PELHjb51r2RPFBqax7HCCXIaLnThvSAMTP1KkI 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جیره‌های حاوی فیتاز، سین‌بیوتیک و سین‌بیوتیک به همراه فیتاز دریافت کردند بیشتر از پرندگان تغذیه شده با جیره شاهد یا جیره با کمبود فسفر بود و این پرندگان وزن زنده بالاتری داشتند (0/05p<). بازده لاشه تحت تأثیر مصرف سین‌بیوتیک، فیتاز و ترکیب سین‌بیوتیک و فیتاز قرار نگرفت. میزان تری‌گلیسرید در خون پرندگانی که با جیره با کمبود فسفر تغذیه شدند کمتر از پرندگان تغذیه شده با جیره‌های شاهد، حاوی سین‌بیوتیک و یا حاوی سین‌بیوتیک + فیتاز بود (0/05p<). نتیجه‌گیری: استفاده از ترکیب سین‌بیوتیک + فیتاز در جیره‌هایی با کمبود فسفر، ضمن کاهش نیاز به منبع معدنی فسفر، سبب بهبود عملکرد رشد جوجه‌های گوشتی و همچنین کاهش دفع فسفر به محیط زیست می‌شود.  </div> <div style="text-align: justify;">Extended Abstract Introduction and Objective: With the increasing development of broiler industry, increasing feeding costs and concerns, environmental pollution caused by nitrogen and phosphorus disposal, finding ways to increase the bioavailability of nutrients, including phosphorus, is of great interest. The purpose of this experiment was to investigate the effect of the combination of phytase and synbiotic in phosphorus deficient diets on the performance of broiler chickens. Material and Methods: 360 one-day-old broiler chickens of Ross 308 strain were used in a completely randomized design with 5 treatments, 4 replications and 18 birds per replication. The birds were fed with the same rations in the first seven days and the experimental diets were given to them from the age of 8 days. Experimental treatments include 1- Control group (diet containing recommended levels of phosphorous), 2- Diet with phosphorus level less than recommended (75% recommended; low phosphorus diet), 3- Low phosphorus diet + phytase, 4- Low phosphorus diet + Synbiotic, 5- Low phosphorus diet + Synbiotic + phytase. Body weight and feed intake were measured in each period and daily weight gain and feed conversion ratio were calculated. At the end of the period, low density serum  cholesterol concentrations, high density poprupe (HDL) and low density poprupe L (LDL) and alanine aminotransferase (ALT) enzymes were measured. Results: During growth period (24-7 days), the weight gain of birds that received phytase, synbiotic and synbiotic diets with phytase was higher than birds fed control or phosphorus deficient diets and these birds had higher live weight (P<0.05). There was no difference in carcass yield and relative weight of liver and ventricular fat between treatments. Experimental treatments had no effect on serum concentrations of cholesterol, HDL and LDL and alanine aminotransferase (ALT) in broilers. The level of triglyceride in the blood of birds fed phosphorus-deficient diets was lower than that of birds fed control diets containing synbiotics or synbiotics + phytase (p<0.05). Conclusions: The use of synbiotec + phytase in phosphorus-deficient diets, while reducing the need for phosphorus mineral source, improves the growth performance of broilers and also reduces phosphorus excretion into the environment.</div> عملکرد, سین‌بیوتیک, جوجه‌های گوشتی, فیتاز, فراسنجه های خونی blood traits, broiler chickens, performance, phytase, symbiotic 49 57 http://rap.sanru.ac.ir/browse.php?a_code=A-10-35-6&slc_lang=fa&sid=1 Morteza Pashaei Jalal مرتضی پاشایی جلال m.pashaei91@gmail.com 100319475328460019093 100319475328460019093 No Department of Animal and Poultry Sciences, College of Aburaihan دانشگاه تهران، گروه علوم دام و طیور، پردیس ابوریحان Leila Soleimani2 لیلا سلیمانی sharifi_sd@yahoo.com 100319475328460019094 100319475328460019094 No University of Tehran, Department of Animal and Poultry Sciences, College of Aburaihan دانشگاه تهران، گروه علوم دام و طیور، پردیس ابوریحان Seyed Davood Sharifi سید داود شریفی sdsharifi@ut.ac.ir 100319475328460019095 100319475328460019095 Yes University of Tehran, Department of Animal and Poultry Sciences, College of Aburaihan, دانشگاه تهران، گروه علوم دام و طیور، پردیس ابوریحان Shirin Honarbakhsh شیرین هنربخش honarbhk@ut.ac.ir 100319475328460019096 100319475328460019096 No University of Tehran, Department of Animal and Poultry Sciences, College of Aburaihan دانشگاه تهران، گروه علوم دام و طیور، پردیس ابوریحان