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Effects of the Protein Level and Energy Concentration of Concentrated Diets

YANG Chunhua ZOU Xinghuai ZHANG Guiquan   

  • Online:2005-07-26 Published:2008-07-07

精料的蛋白质水平及能量浓度对亚成体大熊猫日粮消化率的影响

杨春花  邹兴淮  张贵权   

  1. 华东师范大学生命科学学院

Abstract: The significance of the effects of the protein level (Crude protein, CP) and energy concentration ( Gross energy, GE) of concentrated diets on the diets'digestibility for two sub-adult giant pandas were studied by grouping according to two intersecting factors (2CP ×2GE). The results indicated that the CP level of concentrated diets produced significant effect on the digestibility of CP, hemi-cellulose and GE of the diests ( P < 0.05), and extremely significant effect on that of crude fat ( P <
0.01) (the correlation coefficients were 0.7830, 0.7618, 0.5504, 0.6723, respectively). The GE concentration produced significant effect on the digestibility of nitrogen free effusion (NFE), neutral detergent fibe (NDF) and GE of the diets ( P <
0.05), and extremely significant effect on that of crude fat ( P < 0.01) (the correlation coefficients were 0.5569, 0.6047, 0.5052 , 0.7411, respectively). The interacting effect of the two studied factors was significant on the digestibility of NFE, NDF and GE ( P < 0.05). For the digestibilities of crude fat, hemi-cellulose for Trial 1 - 4 and crude fat, hemi-cellulose, NDF, cellulose and GE for Trial 1 - 5, the linear regression of digestibility and the two assessed factors was significant (α= 0.05) (among them, for crude fat of Trial 1 - 4 and crude fat and hemi-cellulose of Trial 1 - 5, the regression was extremely significant (α= 0.01). By comparing every kind of digestibility of the diets (using LSR method) between different trials, the obvious conclusion could be drawn that Formula 1 (CP 2 ×GE 2 , ie. CP 20.61 % ×GE 19.53 MJ / kg) was the optimum formula, because all digestibilities of Trial 1, except for that of lignin, were the highest among the five trials.

Key words: Concentrated diet, Protein level, Energy concentration, Sub-adult giant panda, Digestibility

摘要: 采用双因子交叉分组(2 ×2) 试验设计方案, 选用2 只亚成体大熊猫进行5 期(第5 期用常规日粮) 消化试验, 考察精料的蛋白质水平与能量浓度对亚成体大熊猫日粮消化率的影响。结果表明: 精料蛋白质水平对粗蛋白、半纤维素、能量的消化率均产生显著影响( P < 0.05) , 对粗脂肪消化率产生极显著影响( P < 0.01) , (相关系数分别为0.783 0、0.761 8、0.550 4、0.672 3) ; 精料能量浓度对无氮浸出物、中性洗涤纤维、能量的消化率产生显著影响( P < 0.05) , 对粗脂肪消化率产生极显著影响( P < 0.01) , (相关系数分别为0.556 9、0.604 7、0.505 2、0.741 1) 。对无氮浸出物、中性洗涤纤维、能量的消化率而言, 该2 个因素互作效应显著( P < 0.05) 。1~4 试验期, 粗脂肪、半纤维素, 1~5 试验期, 粗脂肪、半纤维素、中性洗涤纤维、纤维素、总能量等项消化率与2 个因素线性回归达到显著性水平(α= 0.05) (其中粗脂肪及1~5 期半纤维素达到极显著, α= 0.01) 。从多重比较结果看, 除木质素外, 各项消化率均以第1 期为最高, 因此, 日粮配方1 (CP2 ×GE2 即CP 20.61 % ×GE 19.53 MJ / kg) 是优选配方。

关键词: 精料, 蛋白质水平, 能量浓度, 亚成体大熊猫, 消化率