The Comparetive Study of effect of Selenium Sources Nutrition on Perfor-mance, Blood Metabolites and Immune Response in milk-fed Holstein calves and Holstin- Mont Bilyard Hybrid

Koshgoftar Kafshgarkolaei, Masoumeh (2018) The Comparetive Study of effect of Selenium Sources Nutrition on Perfor-mance, Blood Metabolites and Immune Response in milk-fed Holstein calves and Holstin- Mont Bilyard Hybrid. Masters thesis, University of Mohaghegh Ardabili.

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Text (بررسی مقایسه ای اثر تغذیه منابع سلنیوم بر عملکرد، متابولیت های خونی و پاسخ ایمنی در گوساله های شیرخوار هلشتاین و دو رگ هلشتاین – مونت بیلیارد) Masoumeh Koshgoftar Kafshgarkolaei.pdf Download (1MB) | Preview

Abstract

The purpose of the present study was to compare the effect of selenium sources nutrition on performance, blood metabolites and immune response in Holstein and Holstein- Mont BilYard calves. The experiment was performed using 12 Holstein calves with mean age of 12 ± 1 days and 12 Holstein-Monte Bilyard calves with mean age (16 ± 1) and mean body weight (43 ± 1) kg with 6 treatments in 4 Repeat was performed in a completely randomized complex with 2 × 3 arrangement for 75 days. Treatment 1 consists of: a diet consisting of a starter diet without supplementation of selenium (at zero level) for Holstein-Monte-Bilyard calves, Treatment 2 consists of a basic diet consisting of a starter diet without supplementation of selenium (at zero) for Holstein calves, , Treatment 3 includes: base ration + 0.3 mg / g mineral supplement sodium selenite per kilogram dry matter diet for Holstein -double calves Monte Bilyard, Treatment 4 includes: base diet + 0.3 mg / g mineral supplement sodium selenite per kilogram dry matter diet for Holstein calves, Treatment 5 includes: base ration + 0.3 mg / g mineral supplement Nano Selenium per kilogram dry matter diet for Holstein -double calves Monte Bilyard, Treatment 6 includes: base diet + 0.3 mg / g mineral supplement Nano Selenium per kilogram dry matter diet for Holstein calves. During the experiment, the starter rations in the form of were free and alfalfa was fed to calves from day 20 onwards.The amount of feed consumed in the form of daily and the remainder on the next day weighed and recorded. Body weight of calves was measured individually and the weight gain was determined using the weight difference of calves during the period. The feed conversion ratio was calculated by dividing the feed intake by body weight gain during the 75-day period. In order to determine the blood parameters in the middle and the end of the rearing period (days 35 and 70), blood sampling was performed 3 hours after the morning meal, through the vetidal vein. The results showed that the effect of mineral supplements on dry matter,feed conversion factor, calf weight gain, skeletal growth parameters, strain induced milk yield and calf health was not significant during the experiment period. The results showed no significant difference in glucose, cholesterol, triglycerides, blood urea and cell count (lymphocytes, neutrophils, monocytes) (P <0.05 ). However, it had a significant effect on the activity of glutathione peroxidase and total protein (P <0.05). The level of glutathione peroxidase activity in the selenium supplementation group was significantly higher than that in the control group. The results of this study showed that the type of mineral supplementation of selenium (sodium selenite or nano selenium) as well as the type of race (Holstein or Holstein-Monte Bilyard hips) did not have a significant effect on the activity of glutathione peroxidase activity in the selenium supplements group. Keywords: Blood parameters, Glutathione peroxidase, Nano selenium , Sodium selenite

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