بررسی اثر متقابل بین تعادل کاتیون-آنیون جیره و فیتاز میکروبی بر عملکرد، خصوصیات لاشه و پاسخ ایمنی جوجه های گوشتی

نوع مقاله : مقاله پژوهشی

نویسنده

استادیار تغذیه دام، گروه علوم دامی، دانشگاه آزاد اسلامی واحد شبستر

چکیده

در این تحقیق به منظور بررسی آثار اصلی و متقابل سطوح مختلف تعادل کاتیون-آنیون جیره و آنزیم فیتاز میکروبی بر عملکرد جوجه، خصوصیات لاشه و پاسخ ایمنی، از 1200 قطعه جوجه گوشتی نر سویه تجارتی راس استفاده شد. آزمایش فاکتوریل 3×4 با چهار سطح تعادل کاتیون- آنیون جیره (200، 225، 250 و 275 میلی­اکی­والان در کیلوگرم جیره) و سه سطح آنزیم فیتاز میکروبی در جیره (صفر، 500 و 750 واحد فیتازی در کیلوگرم جیره) استفاده شد. نتایج نشان داد آثار متقابل بین تعادل کاتیون- آنیون جیره و آنزیم فیتاز باعث تفاوت آماری معنی­دار (05/0> P) بر صفات عملکردی (خوراک مصرفی، ضریب تبدیل غذایی، افزایش وزن، شاخص تولید و وزن بدن جوجه­های گوشتی در سن 42 روزگی) شد. آثار متقابل بین تعادل کاتیون-آنیون جیره و فیتاز میکروبی موجب عدم تفاوت معنی­دار (05/0 < P) بین تیمارها از نظر خصوصیات لاشه (وزن لاشه، ران­ها، سینه، پشت + گردن، کبد، قلب، طحال، سنگدان، بورس فابرسیوس و چربی حفره شکمی و هم­چنین وزن و طول قسمت­های مختلف روده باریک جوجه­های گوشتی) شد. آثار متقابل بین تعادل کاتیون- آنیون جیره و فیتاز میکروبی باعث تفاوت آماری معنی­دار (05/0 > P) از نظر سیستم ایمنی جوجه­های گوشتی در دو سن 24 و 34 روزگی شد. به طور کلی، نتایج حاصل از پژوهش حاضر نشان داد که تنوع پاسخ در عملکرد و سیستم ایمنی جوجه­های گوشتی به مکمل فیتاز در جیره تا حدی می­تواند تحت تأثیر تفاوت در سطوح تعادل کاتیون-آنیون جیره باشد.

کلیدواژه‌ها

عنوان مقاله [English]

Study of the interaction between dietary cation-anion balance and microbial phytase on performance, carcass characteristics and immune response of broiler chickens

نویسنده [English]

  • K. Shahsavari
Assistant professor of Animal Nutrition, Department of Animal Science, Shabestar Branch, Islamic Azad University
چکیده [English]

This experiment was carried out using 1200 male Ross broiler chicks to evaluate the interaction effects between dietary cation-anion balance and microbial phytase on performance, carcass characteristics and immune response. The chicks were assigned of the dietery tretements with a 4×3 factorial arrangement in completely randomized design with four levels of dietary cation-anion balance (200, 225, 250 and 275 mEq/kg of diet) and three levels of microbial phytase (0, 500 and 750 phytase units/kg of diets). Results showed that the dietary cation-anion balance and microbial phytase interaction was significant (P < 0.05) for performance traits (feed intake, feed conversion ratio, body weight gain, production index and body weight of broilers on 42 day of age).The interaction between cation-anion balance and phytase was not significant (P > 0.05) for carcass characteristics (carcass, thighs, breast, back + neck, liver, heart, spleen, gizzard, borsa and abdominal fat weights, and also intestine weight and length of the broiler chickens). The dietary cation-anion balance × microbial phytase interaction was significant (P < 0.05) for immune system of broilers at 24 and 34 d of age. Overall, results of the present study indicated that variability in phytase respons in performance and immune system of broiler chickens may be affected, in part, by differences in dietary electrolyte levels.

کلیدواژه‌ها [English]

  • Carass traits
  • microbial phytase
  • Production index
  • Sodium bicarbonate

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تحقیقات تولیدات دامی
دوره 5، شماره 2
شهریور 1395
صفحه 13-24

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