Mehrdad Modirsanei

IntroductionSince the major part of costs in poultry production is related to feed, minimizing this part of the costs which depends on feed ingredients is very important. On the other hand, phosphorous is usually one of the expensive nutrients in poultry feed. Therefore, the amount of nutrients in feed ingredients, especially available phosphorus, has a very important role in lowering the cost of ...

IntroductionThe first days of life are very critical for gastrointestinal (GI) maturation and immunity development, especially for high yield breeds. However, in commercial hatchery practice the birds within this period exposures for many stressors, such as newly hatched chicks remain for up to 36 hours after hatching before they are pulled from hatching cabinet and then it followed by hatchery pr ...

1. IntroductionThe newly hatched chicks may be more acceptances to pathogens and oxidative factors because their immune system is still immature in early period of life. Delay in collection chicks from hatchery trays can culminate immunity and oxidative stress of the newly hatched chicks. Furthermore, it is believed that high yield breed, although advantage to industry, have put more problems on t ...