Analysis of Correlativity Between the Endogenous Nitrogen Losses and Endogenous Energy Losses of Fowl

Hy-line brown adult roosters of400-day-old were used to study the correlativity between the endogenous nitrogen losses and endogenous energy in the endogenous excreta of fowls.The main results were summarized as follows.There was significant correlativity between the endogenous nitrogen losses and endogenous energy losses in the endogenous excreta of roosters,r=0.97(P0.01);linearity regress equation was y^=21.02+36.21x;b=36.21KJ /g.It indicated that energy of endogenous nitrogen was different to that of uric acid,the energy of endogenous nitrogen was higher.It was more reasonable to substitute the energy of uric acid with that of endogenous nitrogen losses.