اثر خوراندن منابع مختلف مواد معدنی کم‌مصرف بر عملکرد و سلامت میش‌های آبستن افشاری و ‏بره‌های آنها ‏

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استاد، گروه علوم دامی، دانشکده کشاورزی، دانشگاه زنجان، ‏زنجان، ایران

2 دانش‌آموخته کارشناسی ارشد، گروه علوم دامی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ‏ایران

3 استادیار، گروه علوم دامی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

4 استادیارپژوهشی بخش تحقیقات علوم دامی، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان چهارمحال و بختیاری، ‏سازمان تحقیقات، آموزش و ترویج کشاورزی، شهرکرد، ایران

5 استادیار، گروه علوم دامی، دانشکده کشاورزی، دانشگاه شهرکرد، شهرکرد، ایران

6 پژوهشگر پسادکتری، گروه علوم دامی، دانشکده کشاورزی، دانشگاه زنجان، زنجان، ایران

چکیده

هدف از پژوهش حاضر بررسی اثر خوراندن منابع متفاوت مواد معدنی کم‌مصرف (روی، مس، منگنز، سلنیوم و کبالت) از 5 هفته پیش از زایش تا 5 هفته پس از زایش بر عملکرد و سلامت میش‌ها و بره‌های افشاری بود. سی و شش رأس میش افشاری آبستن از 5±5/32 روز پیش از زایش مورد انتظار به‌طور تصادفی به سه تیمار آزمایشی اختصاص یافتند. تیمارهای آزمایشی شامل جیره پایه فاقد مکمل معدنی کم‌مصرف (شاهد، 12=n)، جیره پایه بعلاوه شکل سولفاته مواد معدنی کم‌مصرف (تیمار سولفاته، 12=n) و جیره پایه بعلاوه شکل کی‌لیت با گلایسین مواد معدنی کم­مصرف (تیمار گلایسینات، 12=n) بودند. حیوانات در هر تیمار براساس تعداد جنین، وزن و تاریخ زایش مورد انتظار متوازن شدند. ماده خشک مصرفی، وزن بدن، امتیاز وضعیت بدنی و تغییرات آنها، تولید آغوز، تولید شیر و ترکیبات شیر میش‌ها تحت تأثیر تیمارها قرار نگرفتند (05/0<P). هیچ اثری از تیمار روی غلظت­ متابولیت­های سرمی وجود نداشت (05/0P>)، به استثنای غلظت گلوکز سرمی پیش از بره‌زایی که در تیمار سولفاته و گلایسینات نسبت به تیمار شاهد تمایـل به افزایش داشت (07/0=P). میانگین وزن تولد بره­ها بین تیمارهای آزمایشی مشابه بود، اما وزن نهایی بره‌ها در 35 روزگی در میش‌های تغذیه شده با تیمار گلایسینات نسبت به تیمارهای سولفاته و شاهد بیش‌تر بود (05/0=P). هم‌چنین، افزایش وزن روزانه در 35 و 70 روزگی بره‌های متولد شده در تیمار گلایسینات نسبت به تیمارهای سولفاته و شاهد تمایل به افزایش داشت (07/0=P). در مجموع، خوراندن شکل کی‌لیت مواد معدنی کم‌مصرف پیش و پس از زایش به میش­ها منجر به بهبود عملکرد رشد بره‌های افشاری تا 70 روزگی شد.

کلیدواژه‌ها

عنوان مقاله [English]

Effects of feeding different trace mineral sources on performance and health of ‎Afshari ewes and lambs

نویسندگان [English]

  • Hamid Amanlou 1
  • Marziyeh ‎ Khebri 2
  • Behnam Rostami 3
  • Najme Eslamian Farsuni 4
  • Tahere Amirabadi Farahani 5
  • Mohsen Khalili 6
1 Professor, Department of Animal Science, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
2 Former M. Sc. Student, Department of Animal Science, Faculty of Agriculture, ‎University of Zanjan, Zanjan, Iran
3 Assistant Professor, Department of Animal Science, Faculty of Agriculture, University of Zanjan, ‎Zanjan, Iran
4 Assistant Professor, Department of Animal Science, Chaharmahal and Bakhtiari Agricultural and Natural‏ ‏Resources Research and ‎Education Center, AREEO, Shahrekord, Iran
5 Assistant Professor, Department of Animal Sciences, Faculty of Agriculture, Shahrekord University, Shahrekord, Iran
6 Post Doctoral Researcher, Department of Animal Science, Faculty of Agriculture, University of Zanjan, Zanjan, Iran
چکیده [English]

The aim of this study was to investigate the effects of feeding different trace minerals (Zn, Cu, Mn, Se and Co) sources from 4 weeks pre- lambing until 5 week post-lambing on performance and health of Afshari ewes and lambs. Thirty six pregnant Afshari ewes were randomly assigned to 1 of 3 treatments at 32.5±5 d before expected lambing date. Experimental treatments were basal diet without supplemental trace minerals (Control, n=12), basal diet plus sulfate sources of trace minerals (Sulfate, n=12) and basal diet plus organic sources of trace minerals chelating to Glycine (Glycinate, n=12). In each treatment, ewes were balanced for fetal number, body weight (BW), Body condition score (BCS) and expected lambing date. Dry matter intake, BW, BCS and their changes, colostrum and milk yield and milk composition were not affected by treatments (P>0.05). There was no effect of treatments on serum metabolites concentrations, except a tendency (P=0.07) to increase in serum glucose concentrations pre-lambing for ewes receiving sulfate sources of trace minerals compared to those in Glycinate group. Birth weight of lambs was similar among treatments, but lambs BW from ewes fed glycinate source of trace minerals at 35 d was greatest among treatments (P= 0.05). Likewise, average daily gain (ADG) of lambs from Glycinate ewes tended to be greater at 35 and 70 d compared to control and sulfate groups (P=0.07). Overall, feeding chelated trace minerals per- and post-lambing Ashari ewes improved growth performance of lambs until 70d.

کلیدواژه‌ها [English]

  • Afshari ewe
  • late pregnancy
  • trace minerals‎

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علوم دامی ایران
دوره 51، شماره 3
آذر 1399
صفحه 183-192

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سابقه مقاله

  • تاریخ دریافت: 20 دی 1398
  • تاریخ بازنگری: 16 اردیبهشت 1399
  • تاریخ پذیرش: 19 مرداد 1399

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