اثر استفاده از کیلات‌های آلی روی، منگنز و کروم بر عملکرد و میکروفلور سکوم جوجه‌های گوشتی
محورهای موضوعی : فصلنامه زیست شناسی جانوری
ابوالقاسم رضاپور
1
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شهاب الدین قره ویسی
2
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کاوه جعفری خورشیدی
3
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روح الله عبدالله پور
4
1 - گروه علوم دامی، واحد قائم شهر، دانشگاه آزاد اسلامی، قائمشهر، ایران
2 - گروه علوم دامی، واحد قائم شهر، دانشگاه آزاد اسلامی، قائمشهر، ایران
3 - گروه علوم دامی، واحد قائم شهر، دانشگاه آزاد اسلامی، قائمشهر، ایران
4 - گروه علوم دامی، واحد قائم شهر، دانشگاه آزاد اسلامی، قائمشهر، ایران
کلید واژه: جمعیت میکروبی, جوجه‌های گوشتی, ضریب تبدیل خوراک, کیلات‌های آلی, وزن بدن,
چکیده مقاله :
به منظور بررسی اثر استفاده از کیلات‌های آلی روی، منگنز و کروم بر عملکرد و جمعیت میکروبی سکوم جوجه‌های گوشتی پژوهش حاضر انجام شد. این مطالعه در قالب طرح کاملاً تصادفی با 420 قطعه جوجه یک‌روزه گوشتی سویه راس 308 در 7 تیمار، 5 تکرار و 15 پرنده در هر پن و به مدت 42 روز انجام شد. تیمارها عبارت از 1) کیلات روی، منگنز و کروم، 2) کیلات روی و منگنز، 3) کیلات روی و کروم، 4) کیلات منگنز و کروم، 5) کیلات منگنز، 6) کیلات روی و 7) کیلات کروم بودند. صفات عملکردی شامل مصرف خوراک، افزایش وزن بدن و ضریب تبدیل خوراک اندازه‌گیری شدند. در پایان آزمایش میکروفلور سکوم جوجه‌های گوشتی داده برداری شد. داده¬های جمع¬آوری شده با رویه LSmeans در نرم افزار آماری SAS آنالیز شدند. اثر کیلات‌های آلی بر وزن بدن در دوره آغازین و ضریب تبدیل خورک در دوره رشد معنی دار شد (05/0 > p). بیش‌ترین مقدار افزایش وزن (6/176 گرم) در تیمار حاوی کیلات کروم و کمترین مقدار افزایش وزن (8/152 گرم) در تیمار حاوی کیلات روی مشاهده شد. بیش‌ترین مقدار ضریب تبدیل خورک (1/1) در تیمار حاوی کیلات روی، منگنز و کروم و کمترین مقدار (0/1) در تیمار حاوی کیلات کروم مشاهده شد. اثر کیلات‌های آلی بر جمعیت E.coli سکوم جوجه های گوشتی معنی دار شد (05/0 > p). بیش‌ترین (LogCFU/g 65/5) و کمترین (LogCFU/g 15/5) جمعیت باکتری E.coli به ترتیب در تیمارهای حاوی کیلات روی، منگنز و کروم و کیلات روی مشاهده شد. با توجه به بهبود صفات عملکرد و میکروفلور سکوم جوجه‌های گوشتی تحقیق حاضر، استفاده از کیلات‌های آلی قابل توصیه است.
To investigate the effect of using organic chelates of zinc, manganese, and chromium on the performance and microbial population of the caecum of broiler chickens, the present study was conducted. This study was conducted in a completely randomized design by 420-day-old broiler chickens of Ross 308 strain in 7 treatments, 5 repeats, and 15 birds per pen for 42 days. The treatments were 1) organic form of zinc, manganese, and chromium chelate, 2) organic form of zinc and manganese chelate, 3) organic form of zinc and chromium chelate, 4) organic form of manganese and chromium chelate, 5) organic form of manganese chelate, 6) organic form of zinc chelate and, 7) organic form of chromium chelate. Performance traits including feed consumption, body weight gain, and feed conversion ratio were measured. At the end of the experiment, broiler chickens' cecum microflora was collected. Collected data were analyzed by LSmeans procedure in SAS statistical software. The effect of organic chelates on body weight in the initial period and feed conversion ratio in the growth period was significant (p < 0.05). The highest weight gain (176.6 grams) was observed in the treatment containing the organic form of chromium and the lowest weight gain (152.8 grams) was observed in the treatment containing the organic form of zinc. The highest value of feed conversion coefficient (1.1) was observed in the treatment containing the organic form of zinc, manganese, and chromium, and the lowest value (0.1) was observed in the treatment containing the organic form of chromium. The effect of organic chelates on the E. coli population of broiler cecum was significant (p < 0.05). The highest (5.65 LogCFU/g) and the lowest (5.15 LogCFU/g) E. coli bacteria populations were observed in treatments containing organic forms of zinc, manganese, and chromium and organic form of zinc, respectively. Considering the improvement of performance traits and cecum microflora of broiler chickens in this study, the use of organic chelates is recommended.
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