اثر سطوح مختلف پروبیوتیک پروتکسین در جایگزین شیر بر عملکرد و فراسنجه‌های خونی بره‌های شیرخوار زل

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشگاه علوم کشاورزی و منابع طبیعی ساری- گروه علوم دامی

2 گروه علوم دامی دانشگاه علوم کشاورزی ساری

3 وزارت جهاد کشاورزی

چکیده

سابقه و هدف: استفاده از پروبیوتیک‌ها به منظور افزایش عملکرد، بهبود وضعیت سلامت و تعدیل اکوسیستم شکمبه‌ دام‌های شیرخوار یک جایگزین مناسب برای آنتیبیوتیک‌ها محسوب می‌شود و سبب رشد و پرورش بره‌های سالم و پرتوان برای جایگزینی میش‌های مولد و قوچ‌های بالغ گله می‌گردد. همچنین پروبیوتیک‌ها (زیست‌یارها) می‌توانند راه حل مناسبی به منظور حفظ تعادل جمعیت میکروبی و بهبود شرایط تخمیر شکمبه، ارتقاء سیستم ایمنی و افزایش تولید حیوانات نشخوارکننده جوان باشند. بنابراین، هدف انجام آزمایش حاضر بررسی اثرات افزودن سطوح مختلف پروبیوتیک پروتکسین در جایگزین شیر بر عملکرد و فراسنجه‌های خونی ‌ بره‌های نر شیرخوار زل بود.
مواد و روش‌ها: برای انجام این تحقیق تعداد 24 رأس بره نر زل در سن 10 روزگی با میانگین وزن زنده (.350±.54) کیلوگرم در قالب در 4 تیمار آزمایشی و 6 بره (تکرار) در هر تیمار در جایگاه‌های انفرادی به مدت 60 روز مورد آزمایش قرار گرفتند. نمونه‌گیری‌ها در چهار دوره پانزده روزه انجام شد. تیمارهای آزمایشی شامل تیمار شاهد (بدون افزودن پروبیوتیک)، و به ترتیب تیمار شاهد به علاوه 3 (cfu/g 109× 3)، 6 (cfu/g 109 × 6) و 9 (cfu/g 109 × 9) گرم پروبیوتیک در جایگزین شیر مصرفی روزانه بود.
یافته‌ها: نتایج میانگین مصرف خوراک نشان داد که اختلاف آماری معنی‌داری فقط در 15 روز اول آزمایش بین تیمارها مشاهده شد؛ طوری که تیمار شاهد دارای کمترین و تیمار 9 گرم پروبیوتیک دارای بالاترین مقادیر بود (05/0>P). در صفت میانگین افزایش وزن روزانه در بین تیمارها اختلاف معنی‌داری در تمام دوره‌های آزمایش مشاهده شد (05/0>P)، طوری که تیمار 9 گرم پروبیوتیک نسبت به سایر تیمارها دارای مقادیر بیشتری بود. نتایج ضریب تبدیل غذایی نشان داد که اختلاف آماری معنی‌داری در 30 و 45 روز آزمایش مشاهده شد (05/0>P)، طوری که در تیمار 9 گرم پروبیوتیک ضریب تبدیل غذایی به طور معنی داری نسبت به تیمار شاهد دارای مقادیر کمتری بود. نتایج اسکور مدفوع نشان داد در پایان روز 45 و 60 آزمایش اختلاف آماری معنی‌داری بین تیمارها مشاهده شد (05/0>P)، طوری که بره-های دریافت کننده 9 گرم پروبیوتیک نسبت به تیمار شاهد دارای قوام مدفوع بالاتری بودند. میانگین گوارش‌پذیری ظاهری مواد مغذی در بین تیمارها نشان از تفاوت آماری معنی‌داری در مقادیر ماده خشک، الیاف نامحلول در شوینده خنثی و الیاف نامحلول در شوینده اسیدی داشت (05/0>P) که تیمار 9 گرم پروبیوتیک دارای مقادیر بالاتری نسبت به سایر تیمار بود. نتایج حاصل از فراسنجه‌های خونی نشان داد که در خون‌گیری پایان 30 روزگی اختلاف آماری معنی‌داری در تمام فراسنجه‌ها به جز آلبومین وجود داشت (05/0>P). همچنین در خون‌گیری پایان 60 روزگی اختلاف آماری معنی‌داری در تمام فراسنجه‌ها به جز کلسترول، لیپوپروتئین با دانسیته بالا و لیپوپروتئین با دانسیته پایین وجود داشت (05/0>P). آنالیز داده‌های مربوط به صفات لاشه نشان داد که در صفات وزن زنده، درصد لاشه پر و خالی، درصد نیم لاشه و طول لاشه، اختلاف آماری معنی‌داری بین تیمارهای آزمایشی مشاهده شد (05/0>P)، طوری که تیمار 9 گرم پروبیوتیک در صفات مذکور نسبت به سایر سطوح پروبیوتیک دارای عملکرد بهتری بود.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effects different levels of probiotics Protexin in milk replacment onperformance and some blood parameters of suckling lambs of Zel

نویسندگان [English]

  • yadollah chashnidel 1
  • null null 2
  • null null 3
1 sari agriculture and natural resources university
چکیده [English]

Background and objectives: The use of probiotics to enhance performance, improve health status, change and adjustment the ecosystem rumens of suckling animal fed is considered a viable alternative to antibiotics and the development of healthy lambs and replacement ewes producing pluripotent and adult rams with the herd. Probiotics can also be a good solution to maintain the balance of microbial populations, improve rumen fermentation, enhance immune system, and increase the production of young ruminants. The aim of this study was investigated the effect of different levels of probiotics protexin in milk replacers on performance and blood parameters of suckling Zell lambs.
Materials and methods: To do this study 24 male lambs were investigated at the age of 10 days with a mean live weight (5/4 ± 0/53 kg) to 4 treatments and 6 lamb (replication) in individual cages for 60 days. Sampling was carried out in four periods of fifteen days. Treatments including control (without probiotic supplementation) and control treatment plus (3× 109 cfu / g), 6 (6 × 109 cfu / g) and 9 (9 × 109 CFU / g) grams of probiotic in milk replacement respectively.
Results: The results of average feed intake showed that a significant difference was observed in only 15 days of experiment so that the control treatment had the lowest and 9 grams probiotic treatment had the highest values (P<0.05). The results of average weight gain showed that was statistically significant difference was observed in all the experiment periods so that 9 grams of probiotic treatment had better performance than control treatment. (P<0.05). The results of faecal scores showed statistically significant difference was observed in 45 and 60 days of (P<0.05), so that lambs receiving 9 g probiotic had higher stool consistency than control treatment. The results of apparent digestibility of nutrients showed a statistically significant difference in the amount of dry matter, NDF and ADF (P<0.05) that 9 grams probiotic treatments were higher than other treatments. The results of the blood parameters showed was statistically significant differences in first time of blood sampling in all parameters except albumin (P<0.05). Also in second of blood sampling was significant difference in in all parameters except cholesterol, HDL and LDL (P<0.05).The results of carcass traits showed that in traits, live weight, percent carcass full and empty, percent half carcassand the body length were statistically significant difference between treatments (P<0.05) so that 9 grams of probiotic treatment had better performance than the other probiotic levels in these study.
Conclusion: The results of this study showed that the addition of different levels of protexin in milk replacement, improved feed intake, only in the early period of study, higher daily gain in some study times. Also, there was a significant increase in apparent digestibility of nutrients, improved blood immune index, especially immunoglobulin G, and improved carcass weight at the end of the study. According to the results, 9 grams of probiotic level was better than other surfaces in comparison with other parameters

کلیدواژه‌ها [English]

  • Performance
  • blood parameters
  • probiotics
  • suckling lambs of Zell
  • milk replacers
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