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.
Masomeh Nasiroleslami; Mehran Torki; Alireza Abdolmohammadi
Volume 20, Issue 1 , May 2018, , Pages 95-108
Abstract
This study was conducted to determine the effects of dietary supplemental guanidinoacetic acid and betaine on performance, carcass characteristics, meat quality and thyroid hormones of broilers subjected to cold stress. Based on a 2×2 factorial arrangement, 384 day-old male broiler chicks (Cobb) ...
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This study was conducted to determine the effects of dietary supplemental guanidinoacetic acid and betaine on performance, carcass characteristics, meat quality and thyroid hormones of broilers subjected to cold stress. Based on a 2×2 factorial arrangement, 384 day-old male broiler chicks (Cobb) were randomly distributed between four experimental diets (with eight replicates) included basal diet (as control) and the basal diet supplemented with 1200 mg/kg guanidinoacetic acid; 600 mg/kg betaine and 1200 mg/kg guanidinoacetic acid + 600 mg/kg betaine. This trial was performed at the Animal Farm of Razi University (March 2015). In order to create cold stress, on 21th day all birds were subjected to a low temperature (12-15°C), which was remained constant until the end of the experiment. There was no significant effect of experimental diets on the chick’s performance, carcass characteristics, thyroid hormones and liver glycogen levels. Increased breast meat was observed in birds fed the guanidinoacetic acid-included diet. Significant increased L* and a* of meat color were detected in birds fed diets supplemented with guanidinoacetic acid and betaine. Decreased crud fat percentage of breast meat was detected in birds fed the betaine-included diet. The meat pH decreased by time. Increased meat pH was observed in birds fed the betaine-included diet. In conclusion, improved yield and decreased crud fat percentage of breast meat were observed in birds fed the guanidinoacetic acid- and betaine-included diets, respectively. Color indices of broiler breast meat was improved by diet supplementation with guanidinoacetic acid and betaine.