the impacts of a blend of various plants (bioherbal and bioherbal plaus) used as feed supplements on production, egg characteristics, blood biochemistry, and immune parameters of laying hens

Medicinal plants have shown a new approach for utilizing the phytogenic feed additives to improve production, health, and growth performance in the poultry industry (1). in this study, the effects of different phytogenic diets on egg production and quality, blood parameters and immune response of laying hens were investigated (2,3). the results of this study showed that no significant differences were observed between the treatments in terms of feed intake or egg production during the eight weeks of the experiment. the egg quality indicators did not show any significant difference by adding various phytogenic feed additives employed in this study in the 1st period of laying, while the yolk index was significantly different among the treatments. the finding of this study showed that the experimental treatments had no significant effect on blood hematological parameters of birds, while they caused a significant change in the means of biochemical attributes such as triglycerides (tg), cholesterol (cho), albumin, total protein, and uric acid in the blood serum of laying hens. the bioherbal plus and mixture treatments caused the highest and lowest content of tg in the blood, respectively. adding bioherbal to the diet of birds reduced blood cho levels. the high-density lipoprotein levels did not show significant changes with the use of bioherbal/bioherbal plus mixtures alone or with minerals. the results showed that the content of immunoglobulin y reached to the highest value in bioherbal/bioherbal plus mixtures treatment, while the lowest value was obtained in the bioherbal plus diet. this study provided good information about the use of some phytogenic feed additives with different proportions to strengthen the birds’ immune system and maintain their health conditions.