Fatemeh Yarahmadi; Ali Kiani; Raziye Dekami; Hamidreza Sahraie; Ayoub Azizi; Alireza Rocky
Volume 22, Issue 1 , March 2020, , Pages 37-45
Abstract
The present study aimed to investigate the effect of dietary betaine supplementation on circulating homocysteine, antioxidant enzymes and lipid peroxidation in pregnant Sanjabi ewes. Twenty multiparous pregnant ewes (3-5 years old) were fed either a basal diet (Control: 71.2±3.6 kg BW) or the ...
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The present study aimed to investigate the effect of dietary betaine supplementation on circulating homocysteine, antioxidant enzymes and lipid peroxidation in pregnant Sanjabi ewes. Twenty multiparous pregnant ewes (3-5 years old) were fed either a basal diet (Control: 71.2±3.6 kg BW) or the basal diet supplemented with five g per kg dry matter betaine (Betaine: 71.6±3.8 kg BW) during the last five weeks of gestation in a completely random design. Feed intake, body weight (BW) and body condition score (BCS) were weekly recorded. Blood samples were taken from the jugular vein at 28, 14, seven, and one-day pre-partum. The activity of glutathione peroxidase (GPx), catalase (CAT) and blood concentration of homocysteine, and malondialdehyde (MDA) were determined. Dry matter intake, BCS, and BW of ewes were not affected by betaine consumption. In both groups, the activity of GPx increased (P<0.05), while CAT and MDA decreased (P<0.05) as gestation progressed. The activity of GPx and CAT remained unchanged by betaine. Ewes receiving betaine showed greater (P<0.05) blood homocysteine, but lower (P<0.05) MDA as compared to the control ewes. The birth weight of lambs in Betaine ewes was heavier (P=0.06) than those of control ewes. In conclusion, dietary supplementation of betaine was beneficial for alleviating oxidative stress and improving lambs' birth weight in Sanjabi ewes.
fatemeh fouladvand; Ali Kiani; seyed davood sharifi; Arash Azarfar
Volume 21, Issue 2 , July 2019, , Pages 247-259
Abstract
The aim of this study was to determine energy requirement for maintenance (MEm) and to estimate efficiency of energy utilization for gain (kg) using comparative slaughter technique (CST) and relative growth index (RGI: gain/BW0.75) in growing turkey chicks from one to four kg of live body weight (LBW). ...
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The aim of this study was to determine energy requirement for maintenance (MEm) and to estimate efficiency of energy utilization for gain (kg) using comparative slaughter technique (CST) and relative growth index (RGI: gain/BW0.75) in growing turkey chicks from one to four kg of live body weight (LBW). Forty male turkey chicks (24 days of age, 800 ± 93 g LBW) were fed a standard diet (12.3 MJ ME) up to 4 kg of LBW. Apparent metabolizable energy (AME, and AMEn), nutrient digestibility of the diet, and energy balance were determined at two and three kg of BW. In CST, twenty chicks were randomly killed at four stages (five birds at each stage) at 1119 ±60, 2539 ±93, 3528 ±68, 3957 ±82 g of body weight, and the chemical composition of carcass were measured. Maintenance energy requirement (MEm) and efficiency of energy utilization for gain were determined by linear regression in CST. In RGI, the MEm and energy for growth were estimated by a regression of ME intake and relative daily gain. The results showed that in CST, MEm and efficiency of energy utilization for gain were 450 (kJ/kg BW0.75/d), and 56% respectively. In RGI, the MEm and energy for growth were 3.66 (kJ/g BW0.75/d), and 10.4 kJ per g gain. In conclusion, using RGI method is recommended to estimate energy requirement for maintenance and growth in growing turkey due to its simplicity.
Ali Kiani
Volume 19, Issue 3 , November 2017, , Pages 557-567
Abstract
In this study, effect of lycopene and corn supplementation on quantity of colostrum and concentrations of IgG in blood and colostrum in pregnant ewes was investigated.A total of 40 multiparous single-bearing ewes (body weight 68 ±8.4 kg) during last month of gestation were fed with one of the ...
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In this study, effect of lycopene and corn supplementation on quantity of colostrum and concentrations of IgG in blood and colostrum in pregnant ewes was investigated.A total of 40 multiparous single-bearing ewes (body weight 68 ±8.4 kg) during last month of gestation were fed with one of the four experimental diets including; basal diet (CON), basal diet plus 1 g/d lycopen (LYC), 300 g/d corn (COR), 1 g/d lycopen plus 300 g/d corn (LYC + COR). Quantity of colostrum production was determined at 6 h post-partum using oxytocin injection method.The IgG concentration in colostrum at 6 and 12 h post-partum as well as at 14 and one day pre-partum was determined. Quantity of colostrum at 6 h post-partum in COR, and LYC + COR was higher (P<0.05) than that in CON and LYC. Blood IgG concentration in CON was significantly lower than COR, LYC, and LYC + CORN. Ewes in LYC+COR had higher (P<0.05) colostrum IgG concentration than ewes in CON. In conclusion, lycopene and corn supplementation during late gestation increased serum IgG concentrations and improved colostrum quantity and quality in pregnant ewes.
Arash Kheradmand
Volume 19, Issue 1 , May 2017, , Pages 233-244
Abstract
In this study antioxidant effects of olive leaf extract (OLE) in comparison to vitamin C and E on chilled-stored (at 5 °C) bovine sperm was evaluated. The sperm samples collected from epididymis of ten Holstein bovine testis with 3-5 years old, and were diluted with egg yolk and sodium citrate containing ...
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In this study antioxidant effects of olive leaf extract (OLE) in comparison to vitamin C and E on chilled-stored (at 5 °C) bovine sperm was evaluated. The sperm samples collected from epididymis of ten Holstein bovine testis with 3-5 years old, and were diluted with egg yolk and sodium citrate containing 0.5, 1.0 and 2.0 mg/ml of OLE as well as 2 mg/ml vitamin E and C. Addition of OLE significantly reduced sperm motility (P<0.05). Vitamin E significantly improved sperm membrane integrity compared to the other groups (P<0.05). TBARS in 2 mg/ml of OLE treatment was significantly less than that in other treatments (P<0.05). The results showed that addition of OLE to bovine sperms stored at 5 ͦ C for 48 h negatively affected sperm motility despite of a decrease in lipid peroxidation, and therefore, it is not suitable extender to be used for bovine spermatozoa.
Ali Kiani; Ayoob Azizi shotor-khoft
Volume 18, Issue 4 , December 2016, , Pages 749-760
Abstract
Effects of feeding sequence and boiling of barley on digestibility of fiber and activity of hydrolytic enzymes in colonic contents of horse were investigated. The experiment carried out in a completely randomized design using six Arabian mares in a factorial cross-over with four consecutive periods. ...
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Effects of feeding sequence and boiling of barley on digestibility of fiber and activity of hydrolytic enzymes in colonic contents of horse were investigated. The experiment carried out in a completely randomized design using six Arabian mares in a factorial cross-over with four consecutive periods. The concentrate part of the ration was offered either 30 min after (F-C) or 30 min before (C-F) forage feeding. Barley grain was either boiled (processed) or crushed (not processed). At the end of each period, fecal sample was collected directly from rectum and the activities of carboxymethyl cellulase, microcrystalline cellulase, filter paper degrading, and α-amylase enzyme were determined. Results showed that dry matter, neutral detergent fiber and acid detergent fiber intakes were significantly higher in C- F than those in F-C (P<0.05). Feeding sequence had no effects on digestibility of fiber and on activity of carboxymethyl cellulase, microcrystalline cellulase and filter paper degrading activity. Amylase activity was significantly increased in C-F and decreased by boiling barley (P<0.05). When processed barley was used, the activity of carboxymethyl cellulase decreased in F-C but increased in C-F. In conclusion, using F-C feeding sequence and boiling barley showed positive effects on the activity of hydrolytic enzymes in rectal contents of Aabian mares.