Use Of Some Productive Enhancers in Some Farm Animals Under The Conditions Of Egypt

In Egypt, a long hot climate from( may to 0ctober ) and a short cool climate (from December to March) characcterize the sub-tropical climate Exposing the female animals to high ambient temperatur( above 30 oC) impairs the reproductive performance and embryonic development and increases the mortality rate among the offspring. ln males, heal stress affects directly the testicular function anil semen characteristics. The animal growth performance decrease; in hot environmental conditirins Rabbits in hot climate months are very susceptible to heat stress, since they have unfunctional sweat glands and have difficulty in elimination body heat. The Present work aimes to study effects of sortie growth promoters as semi - ruminant and friesion bulls as ruminant effects of hot climate conditions and its amelioration by using of such growth enhancers on new zeabud white male rabbits.