نوع مقاله : مقاله کامل
نویسندگان
1 گروه علوم دامی،دانشکده کشاورزی،دانشگاه زابل
2 گروه علوم دامی، دانشکده کشاورزی، دانشگاه زابل، زابل، ایران
3 گروه علوم دامی، دانشکده کشاورزی، دانشگاه جیرفت، جیرفت، ایران
4 گروه علوم دامی،دانشکده کشاورزی، دانشگاه زابل
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Introduction: Zinc plays an important role in metabolism, improving health and increasing the production of ruminant animals, and its deficiency causes a decrease in growth and a weak immune system.Objective: To investigate the effect of different levels of zinc supplements (mineral, organic and nano) on some blood metabolites and rumen fermentation parameters of Baluchi lambs. Methods: This experiment was conducted on 24 male Balochi lambs (3-4 months old and average weight 20±2 kg) in a completely randomized design with four treatments and six repetitions for 70 days. Experimental treatments include: 1) basic diet without zinc supplement (control), 2) diet with 100 mg of zinc oxide, 3) diet with 25 mg of nano-zinc oxide, and 4) diet with 50 mg of zinc. Methionine was all per kilogram of feed dry matter. Results: There was no significant difference between the treatments in terms of serum glucose, total protein, albumin, urea, triglyceride, cholesterol, LDL, HDL, HDL/LDL ratio, calcium, phosphorus and copper concentrations (P>0.05). The concentration of zinc in the supplementary treatments increased compared to the control and the concentration of thyroid hormones (T3 and T4) in the blood serum of treatments three and four, and the concentration of iron and malondialdehyde in the blood plasma of lambs fed with zinc nanooxide decreased compared to other treatments (P<0.05). Also, rumen ammonia nitrogen concentration decreased in the third and fourth treatments, and total volatile fatty acids and acetate-propionate ratio increased significantly in these treatments compared to the control and second treatments (P<0.05).Conclusion: Considering the reduction of rumen ammonia nitrogen and the increase of volatile fatty acids and thyroid hormones in the blood, the use of organic zinc methionine supplement and zinc nanooxide instead of zinc oxide in the diet of Baluchi lambs is recommended.
کلیدواژه‌ها [English]
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