精料的蛋白质水平及能量浓度对成体大熊猫日粮消化率的影响

Effects of Protein Level and Energy Density of Concentrated Diets on Digestibility of Adult Giant Pandas

采用双因子交叉分组(2×2)试验设计方案,考察精料的蛋白质水平与能量浓度对成体大熊猫日粮消化率影响的显著性。结果表明:精料的蛋白质水平对粗蛋白和粗脂肪的消化率均产生了极显著影响(P<0·01,正相关),精料的能量浓度对粗蛋白的消化率产生了显著影响(P<0·05,负相关);二因素对其他各项消化率的影响均不显著(P>0·05);此外,对粗蛋白消化率而言,二因素互作效应显著(P<0·05);各试验期之间消化率多重比较结果显示,精料配方4(CP20·61%×GE18·08MJ·kg-1)为优选配方。本研究说明:精料的蛋白质水平及能量浓度对成体大熊猫日粮消化率产生了一定的影响,成体大熊猫倾向于高蛋白、低能量的精料。

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.