دوره 12، شماره 33 - ( پاییز 1400 1400 )
جلد 12 شماره 33 صفحات 53-44 |
برگشت به فهرست نسخه ها
گروه علوم دامی دانشکده کشاورزی دانشگاه محقق اردبیلی
چکیده: (1977 مشاهده)
اثر سطوح مختلف چگالی ذرت پرک شده بر عملکرد، فراسنجه‌های خونی و شکمبه ای 48 رأس گوساله شیرخوار نژاد هلشتاین با میانگین وزنی (1/20±38/5) کیلوگرم در قالب 4 تیمار و 12 تکرار به‌مدت 70 روز بررسی شد. تیمارها شامل دانه ذرت به شکل آردی (شاهد)، دانه ذرت پرکشده با چگالی 300، دانه ذرت پرک شده با چگالی 350 و دانه ذرت پرک شده با چگالی 400 گرم بر لیتر بودند. گوساله‌ها در 56 روزگی از شیرگیری شدند و مصرف روزانه خوراک آغازین و وزن بدن تا 70 روزگی اندازه گیری شد. اثر تغذیه تیمارهای آزمایشی بر افزایش وزن و مصرف ماده خشک گوساله ها معنی دار نبود. نتایج حاصل از این تحقیق اثر معنی دار تیمارهای مورد آزمایش بر غلظت اسیدهای چرب فرار شکمبه و تری گلیسیرید خون را نشان داد (0/05>p). چگالی 350 گرم بر لیتر ذرت پرک شده (تیمار 3) بالاترین غلظت تری گلیسیرید، پروپیونیک و بوتیریک اسید و تیمار حاوی ذرت پرکشده با چگالی300 گرم (تیمار 2) بر لیتر بیشترین میزان استیک اسید را به خود اختصاص دادند. بالاترین غلظت آی-والریک (i-VA) اسید متعلق به تیمار شاهد (فرم آردی دانه ذرت) بود. اثر دوره نمونه برداری بر پارامترهای عملکردی، خونی، رشد اسکلتی و در بین اسیدهای چرب فرار شکمبه استیک و ایزومرهای والریک اسید معنی دار بود (0/05>p). بر اساس نتایج این تحقیق عمل‌آوری دانه ذرت با چگالی 350 گرم بر لیتر نسبت به دیگر چگالی ها پاسخ عملکردی بهتری در ارتباط با اغلب پارامترهای مورد بررسی داشت و بدون داشتن تأثیر منفی بر عملکرد گوساله ها قادر به بهبود برخی پارامترهای عملکردی، خونی و شکمبه ای گوساله ها بود.
نوع مطالعه: پژوهشي |
موضوع مقاله:
تغذیه نشخوارکنندگان
دریافت: 1399/10/24 | ویرایش نهایی: 1400/9/13 | پذیرش: 1399/12/11 | انتشار: 1400/7/10
دریافت: 1399/10/24 | ویرایش نهایی: 1400/9/13 | پذیرش: 1399/12/11 | انتشار: 1400/7/10
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