In order to improve reproductive performance of the breeding pigeons by estrus promoting medicinal herbs,trials over five laying cycles were conducted.Compared with the controls,in experimental group the laying period reduced 4 ̄5 d;both,the hatchability and the livability of young pigeons increased by about 3%;mean body weight at 28 d old increased by about 30 g.From thirty pairs of breeder pigeons additional profit o...