Abstract:

The significance of the effects of the protein level(crude protein,CP)and energy density(gross energy,GE) of the concentrated diets on the diets digestibility of four adult Giant Pandas was studied by grouping according to two-factors intersecting each other(2CP×2GE).The results indicated that the CP level of the concentrated diets had extremely significant effect on the digestibility of both crude protein and that of crude fat of the diets(P<0.01,positive corelation);the GE density had significant effect on the digestibility of crude protein of the diets(P<0.05,negative corelation);interacting effect of the two factors was significant on the digestibility of crude protein(P<0.05);the two factors & their interacting effect had no significant effect on the other kinds of digestibilities.By comparing every kind of digestibility of the diets(using LSR method) between different trials,formula 4 of concentrated diets(CP2×GE1,ie.CP20.61%×GE18.08 MJ·kg^-1) was the optimum formula.The research indicated that in general, some effects on diets digestibility for Giant Pandas were produced by CP and GE of the concentrated diets,and it seemed that adult Giant Pandas were inclined to concentrated diets with comparatively high protein and low energy.

Key words: concentrated diet, CP level, GE density, Giant Panda, digestibility