No abstract

No abstract

No abstract

Broilers' productivity; broilers' physiological and immunological status; defatted green algae biomass.

T he poultry production is one of the biggest sectors in livestock production, it covering animal protein demanding for millions of people world wide, because poultry meat is cheaper and healthier than red meat (Farrell, 2013). Broiler chick's selection for commercial goals has been extremely developed over the recent decades (Tallentire et al., 2016). It can be a result of feed conversion efficiency increasing and a reduction of feed costs (Taha, 2003). So, feed alternatives needed to improve broiler growth performance and protect the birds from disease infections.Many countries has been used antibiotics as growth promotant, as birds during their breeding are exposed to many stressors that could effect on health, growth and mortality. Also, they have been used as immunomodulators, hence participate to enhance the growth performance and health status of birds (Cheng, 2014; Fadl