zahra tahami; Behrouz Dastar; Ehsan Oskoueian; Seyed reza hashemi
Abstract
This study was performed to investigate the effect of organic and inorganic selenium supplementation on laying hens' performance, quality traits and peroxidation of egg yolks and whites. The experiment was carried out in a completely randomized design with 300 laying hens (W-36) from 23 to 35 weeks of ...
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This study was performed to investigate the effect of organic and inorganic selenium supplementation on laying hens' performance, quality traits and peroxidation of egg yolks and whites. The experiment was carried out in a completely randomized design with 300 laying hens (W-36) from 23 to 35 weeks of age with 5 treatments and 6 replications and 10 laying hens in each replication. Experimental treatments include: treatment one or control (basic diet without selenium), The second treatment of 0.5 selenite-sodium (base diet+0.5 mg/kg selenite-sodium), the third treatment selenite-sodium 1 (basic diet+1mg/kg selenite-sodium), the fourth treatment selenium-methionine 0.5 (basal diet + 0.5 mg/kg seleno-methionine) and the fifth treatment was seleno-methionine 1 (basal diet +1 mg/kg seleno-methionine). The results showed that experimental treatments had no significant effect on egg weight, weight mass, production percentage, feed intake, feed conversion ratio and egg yolk and egg white characteristics (P<0.05). Peroxidation of egg yolk and egg white fats in 1 mg/kg seleno-methionine treatment showed the lowest rate compared to other experimental treatments (P<0.05). The results of the present study showed that among the sources of selenium, 1 mg/kg of selenium-methionine more effectively reduced the peroxidation of fats and increased antioxidant activity.
Sahar Aliabadi; S. R. Hashemi; Darush Davoodi; Saeed Hasani; Samira Shakiba
Abstract
The aim of this study was to invastigate the effect of organic acids and silver nanoparticles coated on zeolite on performance, intestinal morphology and gastrointestinal microbial population in broiler chickens. A total of 375 one-day old broiler chickens were randomly assigned to 5 diets including: ...
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The aim of this study was to invastigate the effect of organic acids and silver nanoparticles coated on zeolite on performance, intestinal morphology and gastrointestinal microbial population in broiler chickens. A total of 375 one-day old broiler chickens were randomly assigned to 5 diets including: (1) a basal diet (control), (2) the basal diet containing 1% zeolite, (3) the basal diet containing 1% of zeolite-coated with 0.5% silver nanoparticles, (4) the basal diet containing 1/5 g/kg Organic acids and (5) the basal diet containing 1% of zeolite-coated with 0.5% of silver nanoparticles and 1/5g/kg organic acids. The experimental treatments had no significant effect on performance characterization of birds (P>0.05). Total count of anaerobic bacteria in ceca was decreased on silver nanoparticles coated on zeolite treatment on 21 d of experiment (p < 0.05). The number of lactobacillus bacteria in ileum was increased in all of treatments compared to the control group on 42 d of experiment (p < 0.05) and both tretments contain with organic acid were the most number of lactobacillus bacteria in ceca (p < 0.05). The use of silver nanoparticles coated on zeolite in chickens significantly increased villi length, villi/crypt depth, villus surface area, muscular layer thickness and decreased crypt depth and villus width compared to control treatment (p < 0.05). In conclusion silver nanoparticles coated on zeolite in broilers diet can increase intestinal lactobacillus and could be used as growth and health promoter supplements in broiler chickens feed.
Golbahar Agh; Behrouz Dastar; Mahmood Shams Shargh; Seyed Reza Hashemi; Reza Mirshekar
Abstract
An experiment was conducted to evaluate the effect of different levels of black seed and two dietary protein levels on performance and blood parameters of broiler chickens. A total number of 336 un-sexed day-old Ross 308 broiler chickens were used in a 2×3 factorial arrangement with a completely ...
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An experiment was conducted to evaluate the effect of different levels of black seed and two dietary protein levels on performance and blood parameters of broiler chickens. A total number of 336 un-sexed day-old Ross 308 broiler chickens were used in a 2×3 factorial arrangement with a completely randomized design consisted of 6 treatments (three levels of black seed (0, 1, 2 percent) in two protein levels (NRC recommended and 87% NRC, 1994)) with 4 replicates and 14 chicks in each replicate. All diets were iso-caloric and had the minimum nutrient requirements recommended by NRC (1994) except for protein. The results showed that using diets with NRC protein level rather to low protein diets resulted in a higher live body weight (P<0.05). Reducing dietary protein level led to reduced protein consumption and increased protein efficiency ratio (P<0.05). Reducing dietary protein level resulted in a significant decrease in carcass and thigh percentage (P<0.05). Serum albumin concentration decrease significantly when dietary protein reduced (P<0.05) Supplemented low protein diet with 1 and 2% black seed significantly improve live body weight, feed conversion ratio and protein efficiency ratio (P<0.05), as these values were similar to those birds were fed diets with sufficient quantity of protein. Supplemented low protein diet with black seed significantly improve breast, heart and gizzard (P<0.05) since their values were close to diets containing NRC recommended protein. These results demonstrated that supplementing black seed to low protein diet improve broilers growth performance.
