کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11005724 | 1494806 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of zinc and vitamin E supplementation on hormones and blood biochemicals in peri-partum Sahiwal cows
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
Thirty-two advanced pregnant multiparous Sahiwal cows were used to study the effect of additional zinc (Zn) and vitamin E (VE) supplementation on hormonal and biochemical changes. Cows were randomly assigned to four groups and fed a basal diet of compounded concentrate, berseem fodder, and wheat straw in a ratio of 60:20:20. The groups were: (1) the basal diet with no supplement (control treatment); (2) the basal diet supplemented with 60â¯mg/kg DM/cow daily of Zn (Zn treatment); (3) the basal diet supplemented with 1000â¯IU/cow daily of vitamin E (VE treatment); and (4) the basal diet supplemented with a combination of 60â¯mg Zn/kg DM/cow and 1000 IU vitamin E/cow/d (Znâ¯+â¯VE treatment). Blood samples were collected on â60, â45, â30, â15, â7, â3, 0, 3, 7, 15, 30, 45, 60, 90, and 120 d in relation to expected date of calving and were analyzed for endocrine variables and biochemical changes. Plasma concentrations of leptin, insulin, insulin like growth factor-1 (IGF-1), triidothyronine (T3), and tetraiodothyronine (T4) were decreased toward calving and observed lowest (Pâ¯<â¯0.05) on 3 d post-partum. However, plasma levels of growth hormone (GH) and cortisol increased toward calving and were found highest (Pâ¯<â¯0.05) on 3 d post-partum. Pre-partum concentrations of leptin and IGF-1 were higher (Pâ¯<â¯0.05) than its respective concentration observed during post-partum. Post-partum concentrations of GH and cortisol were higher (Pâ¯<â¯0.05) than its respective pre-partum concentration. Pre-partum concentrations of urea, triglycerides, Zn, and VE were higher (Pâ¯<â¯0.05) and total cholesterol and HDL cholesterol were lower than its values observed in post-partum among all the groups. Treatments had significant (Pâ¯<â¯0.05) effect on plasma hormonal levels and levels of Zn and VE but no effect on biochemical attributes. Cows fed on diet supplemented with Znâ¯+â¯VE had highest (Pâ¯<â¯0.05) pre as well as post-calving concentrations of leptin (6.38 vs 5.01â¯ng/ml), insulin (1.39 vs 1.33â¯ng/ml), GH (9.29 vs 13.72â¯ng/ml), IGF-1 (14.55 vs 12.59 nmol/l), T3 (1.45 vs 1.40â¯ng/ml), T4 (32.44 vs 31.79â¯ng/ml) whereas as lowest concentration of cortisol hormone (3.05 vs 3.44â¯ng/ml). Cows supplemented with combination of Zn and VE showed minimum decline in plasma concentration of leptin, insulin, GH, IGF-1, T3, and T4, and minimum increase in cortisol concentration. In conclusion, dairy cows around parturition faces various endocrine and biochemical alterations and supplementation of Zn in combination with VE can ameliorate adverse effect of calving stress by maintaining circulatory concentration of hormone and biochemicals towards the basal levels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Trace Elements in Medicine and Biology - Volume 50, December 2018, Pages 489-497
Journal: Journal of Trace Elements in Medicine and Biology - Volume 50, December 2018, Pages 489-497
نویسندگان
Gulab Chandra, Anjali Aggarwal, Muneendra Kumar, Anil Kumar Singh,