an experiment was conducted to investigate the effects of using different levels of red pepper powder (rp) and marigold flower powder (mf) on egg production, egg yolk color andsome blood metabolites in laying hens. ninety, 103-weeks old laying hens were divided into 5 treatments groups of 6 birds in each cage with 3 replicates in a completely randomized design. the birds were fed a corn-soybean...

Avian embryogenesis can be manipulated by alteration of the temperature during incubation of the brooding egg. Investigations in turkeys showed that a higher temperature during early embryogenesis positively affects the myogenesis accompanied with a higher muscle fibre number (MFN). The aim of this study was to transfer this result to broiler and to investigate if an alteration of the temperatu...

An experiment was conducted to investigate the effects of using different levels of Red Pepper powder (RP) and Marigold flower powder (MF) on egg production, egg yolk color andsome blood metabolites in laying hens. Ninety, 103-weeks old laying hens were divided into 5 treatments groups of 6 birds in each cage with 3 replicates in a completely randomized design. The birds were fed a corn-soybean...

Five series of experiments were accomplished, utilizing a total of 190 birds. The established methods of the department's atherosclerosis research team were followed throughout. One-day old Hy-Line chicks were obtained from a commercial hatchery and reared in a battery brooder on a diet of commercial chick starter mash. At onset of the study, the birds were divided into experimental groups and ...

Canthaxanthin (Cxn) is a fat-soluble red carotenoid pigment and is reported to be immunomodulatory. Broiler breeder hens were fed 0 ppm (Control), 6 ppm or 12 ppm Cxn to determine the effect of maternal dietary Cxn on chicks hatched from hens at 31 (Early), 45 (Mid) and 57 (Late) wk of age. Whole blood was obtained at 1 and 4 d of age to assess the number of cells able to engulf at least one Es...

This study investigated the effects of Fe-soy proteinate (Fe-SP) and magnesium oxide (MgO) dietary supplements on eggshell quality in laying hens. A total of 800 26-wk-old Hy-Line Brown hens were assigned to four dietary treatments: control (C), FeSP 100 (100 ppm Fe-soy proteinate), MgO (3 g MgO/kg diet), and Fe-SP 100+MgO. Each treatment had five replicates of 40 hens. The FT-IR (Fourier trans...

Heat stress is an effective factor on immune responses, body weight, egg production and egg quality of chickens. The major effect of heat stress is due to decreased food intake and alteration in acid-base balance. During the recent years, efforts to improve laying performance at high temperatures have been relatively successful. Supplementation of the diet or drinking water with special nutrien...