ارزیابی اثر منابع نشاسته ای و پروتئینی جیره‌ آغازین بر غلظت اسیدهای چرب فرار شکمبه، متابولیت های خون و افزایش وزن گوساله های هلشتاین

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه علوم دامی، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران

2 پژوهشکده کشاورزی هسته ای، پژوهشگاه علوم و فنون هسته ای، کرج، ایران

10.22034/aej.2022.359343.2870

چکیده

در خوراک آغازین گوساله معمولا از دانه ذرت و کنجاله سویا استفاده می شود و اخیرا کنجاله کانولا و دانه جو هم توصیه شده اند. هدف از انجام این تحقیق تعیین اثرات اصلی ومتقابل افزودن دانه ذرت یا دانه جو به خوراک آغازین باکنجاله سویا یا کنجاله کانولا بر الگوی اسیدهای چرب فرار شکمبه و افزایش وزن گوساله ها بود. در یک آزمایش فاکتوریل 2×2 تعداد 40 گوساله هلشتاین در سن سه روزگی به طور تصادفی جیره های آزمایشی شامل دانه ذرت آسیاب شده–کنجاله سویا، دانه ذرت آسیاب شده–کنجاله کانولا، دانه جو آسیاب شده–کنجاله سویا و دانه جو آسیاب شده– کنجاله کانولا دریافت کردند. اسیدهای چرب فرار شکمبه متابولیت های خونی، مقدار مصرف خوراک آغازین و افزایش وزن گوساله ها ارزیابی شد. دانه ذرت با دو منبع پروتئینی تفاوتی در غلظت کل اسیدهای چرب فرار نشان نداد ولی دانه جو-کنجاله کانولا سبب افزایش غلظت کل اسیدهای چرب فرار نسبت به دانه جو-کنجاله سویا شد. کم ترین خوراک مصرفی به تیمار دریافت‌کننده دانه جو-کنجاله کانولا و بیش ترین مقدار به تیمار دریافت کننده دانه ذرت-کنجاله سویا تعلق داشت. بیش ترین افزایش وزن به تیمار دریافت کننده ذرت-کنجاله سویا و کمترین افزایش وزن به تیمار دریافت کننده جو-کنجاله کانولا تعلق داشت. نتایج تحقیق حاضر نشان داد که دانه ذرت بر دانه جو و کنجاله سویا برکنجاله کانولا برای تنظیم خوراک آغازین گوساله ها برتری دارد. ترکیب دانه ذرت-کنجاله سویا بهترین و ترکیب دانه جو-کنجاله کانولا ضعیف ترین عملکرد را در گوساله ها نشان داد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Effects of starch and protein sources of starter on ruminal volatile fatty acids, blood metabolite and body gain of Holstein calves

نویسندگان [English]

  • Amin Akbarian 1
  • Mohammad Chamani 1
  • Parvin Shawrang 2
  • Ali Asghar Sadeghi 1
1 Department of Animal Science, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 Nuclear Agriculture Research School, Nuclear Science and Technology Research Institute, Karaj, Iran
چکیده [English]

There is limited information concerning the interaction between grain and protein sources in starter diets on rumen fermentation profile and calf performance. It was hypothesized that calves would respond differently to various grain sources when fed with starter diets containing different protein sources. The objective of current study was to investigate the interactions between grain sources (corn vs barley) and protein sources (soybean meal vs. canola meal) on rumen fermentation profiles and calves’ growth. In a 2 × 2 factorial experiment, 40 calves (5 female and 5 male) were randomly assigned to four treatments to receive starter diets consisting 1. ground corn and soybean meal, 2. ground corn and canola meal, 3. ground barley and soybean meal, and 4. ground barley and canola meal. Volatile fatty acids, blood metabolite and calves’ growth were assessed for 65 days. Corn grain had no significant effect when included by soybean meal and canola meal, but barley grain resulted in higher total volatile fatty acids when canola meal included instead of soybean meal. The lowest starter intake was found for calves received barley-canola meal and the highest was for those received corn-soybean meal. Calves fed with starter diets containing corn soybean meal had greater average daily gain compared with calves fed barley-canola meal. The results revealed that corn grain is better than barley and and soybean meal is better than canola meal for calves starter formulation. The best composition was corn-soybean meal and the worst one was barley-canola meal which had the poorest effect on calves’ growth.

کلیدواژه‌ها [English]

  • Acetate
  • Glucose
  • propionate
  • ruminal pH
  • weight gain
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