هدف از اين تحقيق بررسي تأثير افزودن روي و مس به جيرۀ ميش هاي آبستن نژاد مهربان در اواخر دورۀ آبستني بر رخنماي (پروفيل) مواد كاني خون و شير ميش ها، عملكرد رشد بره هاي آنها و برخي فراسنجه هاي سوختوسازي (متابوليكي) و خونشناختي (هماتولوژي) بود. هفده رأس ميش3-4 ساله، 45 روز پيش از زايمان به سه گروه تقسيم شدند. تيمارها شامل: 1) جيرۀ پايۀ بدون مكمل روي و مس (حاوي 18/98 قسمت در ميليون يا پيپيام روي و 7/51 پي پي ام مس)؛ 2) جيرۀ پايه افزون بر 30 پي پي ام روي بهصورت سولفات روي و 3) جيرۀ پايه افزون بر 30 پي پي ام روي بهصورت سولفات روي و 8 پي پي ام مس بهصورت سولفات مس بود. وزن تولد و وزن 10، 20 و 30 روزگي بره ها ثبت شد. در اين مدت بره ها به همراه مادر نگهداري مي شدند. خون گيري از ميش ها در روزهاي 45-، 0 و 30+ زايش و از بره ها در سن 10 و 20 روزگي به عمل آمد. نمونۀ شير در روزهاي 0، 15 و 30 پس از زايش گردآوري شد. افزودن روي و مس به جيره سبب افزايش غلظت روي و مس پلاسما (ميش ها و بره ها) و شير شد (P<0.05) اما غلظت آهن شير و همچنين كلسيم، فسفر سرم برهها تحت تأثير قرار نگرفت (0/05
چكيده لاتين :
The aim of this study was to investigate the effect of zinc and copper adding to diet of late-pregnant Mehraban breed
ewes, on blood and milk minerals profile, lambs growth performance and some blood parameters. Seventeen ewes
with 3-4 years old, 45 days before delivery were divided into 3 groups. Treatments includes: treat1) basal diet without
supplement (containing 18.98 ppm Zn and 7.51 ppm Cu); 2) basal diet+30 ppm Zn as zinc sulfate, and 3) basal
diet+30 ppm zinc as zinc sulfate and 8 ppm Cu as copper sulfate. Lambs were weighed at birth and at 10, 20 and 30
days of age. Lambs were raised with their dams during the experimental period. Blood samples of ewes were
collected at -45, 0 and +30 days of delivery and lambs at 10 and 20 days of age. Milk sample was collected at 0, 15,
30 days after delivery. Dietary supplementation of zinc and copper significantly increased plasma (ewes and lambs)
and milk zinc and copper concentrations (P<0.05), however, milk iron and also serum Calcium and Phosphorus
concentrations were not affected (P>0.05). In treat-2 and 3, lambs body weight, daily gain, red blood cells count,
hemoglobin concentration, plasma T3, zinc and ALP concentrations were significantly higher than control group
(P<0.05). The concentrations of glucose, creatinine, total protein, albumin, globulin, lactate dehydrogenase,
triglycerides, cholesterol were not affected by treatments (P>0.05). The results showed that adding 30 ppm zinc to
pregnant ewes' diet result in increase plasma and milk zinc concentrations and finally lambs growth performance.