1Vansoest P J. Use of detergents in the analysis of fibrous fee&s. A rapid method or the detemaination of fiber and lignin[J].J.Assoc. Off.Anal.Chem.1963, 46:829-835,.
6Fluharty F L, McCIure K E.Effect of dietary energy intakes and protein concentration on performance and visceral organ mass in lambs[J].Anim Sci,1997,75:604-610.
7Beauchemin.K A, McCelland L A, Jones S D.Effects of crude protein content, degradability and energy concentration of the diet on growth and carcass characteristics of market Iambs fed high concentrate diets[Jl.Anim Sci,1995,75: 387-395.
8Mahgoub C D,Eady L J.Effects of dietary energy density on feed in take body weight gain and carcass chemical composition of omanigrowing lambs[J],Small RuminreS,2000,37:387-395.
9Haddad S G,Husein M Q.Effect of dietary energy density on growth per formance and slaughtering characteristics of fattening awassitambs[J].Livest Prod Sci,2004,87:171-177.
10Lourenco A L G,Diasda-Silva A A,Fonseca A J M,et al.Effects of live weight maturity and genotype of sheep fed ahay-based diet on intake digestion and live weight gain[J].Livest Prod Sci,2000,63:291-296.