本试验旨在研究饲粮代谢能和粗蛋白质水平对育成期太行鸡生长性能和血清生化指标的影响，以确定饲粮适宜代谢能和粗蛋白质水平，为制定太行鸡饲养标准提供依据。以代谢能（11.0、11.5、12.0 MJ/kg）和粗蛋白质水平（14%、15%、16%）为因子，采用2因素3水平的试验设计。选取体重均匀、健康的77日龄太行鸡母鸡360只，随机分为9组，每组设4个重复，每个重复10只鸡。预试期3 d，正试期42 d。结果表明：1）饲粮代谢能水平对育成期太行鸡平均日采食量和料重比的影响显著（P<0.05），随饲粮代谢能水平的升高，育成期太行鸡的平均日采食量和料重比降低。饲粮粗蛋白质水平对育成期太行鸡料重比的影响显著（P<0.05），随饲粮粗蛋白质水平的升高，育成期太行鸡的平均日采食量先增加后降低，料重比先减小后增大。饲粮代谢能和粗蛋白质水平对育成期太行鸡平均日采食量、平均日增重和料重比表现出显著互作效应（P<0.05）。2）饲粮代谢能水平对育成期太行鸡平均日代谢能摄入量（ADMEI）和平均日粗蛋白质摄入量（ADCPI）的影响显著（P<0.05），随饲粮代谢能水平的升高，育成期太行鸡的ADMEI增加。饲粮粗蛋白质水平对育成期太行鸡ADCPI的影响显著（P<0.05），随饲粮粗蛋白质水平的升高，育成期太行鸡的ADCPI增加。饲粮代谢能和粗蛋白质水平对育成期太行鸡ADMEI和ADCPI表现出显著互作效应（P<0.05）。3）饲粮代谢能水平对育成期太行鸡血清甘油三酯含量的影响显著（P<0.05）。饲粮代谢能和粗蛋白质水平对育成期太行鸡血清甘油三酯含量表现出显著互作效应（P<0.05）。综合血清生化指标得出，饲粮代谢能水平为11.5 MJ/kg即可以满足太行鸡的能量需要。综合考虑各项指标，育成期太行鸡饲粮适宜代谢能水平为11.5 MJ/kg，适宜粗蛋白质水平为14%~15%。

This experiment was conducted to study the effects of dietary metabolizable energy and crude protein levels on growth performance and serum biochemical indexes of Taihang chickens during growing period, and to determine the optimum dietary metabolizable energy and crude protein levels, so as to provide basis for formulating feeding standard of Taihang chickens. The metabolic energy (11.0, 11.5 and 12.0 MJ/kg) and crude protein (14%, 15% and 16%) were used as the factors, and the experiment designed with 2 factors and 3 levels. A total of 360 healthy 77-day-old Taihang chickens with similar body weight were selected and randomly divided into 9 groups with 4 replicates per group and 10 chickens per replicate. The pre feeding period was 3 days, and the test period was 42 days. The results showed as follows:1) dietary metabolizable energy level had significant effects on the average daily feed intake and feed to gain ratio of Taihang chickens during growing period (P<0.05), with dietary metabolizable energy level increasing, the average daily feed intake and feed to gain ratio of Taihang chickens during growing period were decreased. Dietary crude protein level had significant effects on the feed to weight ratio of Taihang chickens during growing period (P<0.05), with dietary crude protein level increasing, the average daily feed intake firstly increased and then decreased, and the feed to gain ratio firstly decreased and then increased. Dietary metabolizable energy and crude protein levels showed significant interaction effects on average daily feed intake, average daily gain and of feed to gain ratio of Taihang chickens during growing period (P<0.05). 2) Dietary metabolizable energy level had significant effects on the average daily metabolizable energy intake (ADMEI) and average daily crude protein intake (ADCPI) of Taihang chickens during growing period (P<0.05), with dietary metabolizable energy level increasing, the ADMEI of Taihang chickens during growing period was increased. Dietary crude protein level had significant effects on the ADCPI of Taihang chickens during growing period (P<0.05), with dietary crude protein level increasing, the ADCPI of Taihang chickens during growing period was increased. Dietary metabolizable energy and crude protein levels showed significant interaction effects on ADMEI and ADCPI of Taihang chickens during growing period (P<0.05). 3) Dietary metabolizable energy level had significant effects on serum triglyceride content of Taihang chickens during growing period (P<0.05). Dietary metabolizable energy and crude protein levels showed significant interaction effects on serum triglyceride content of Taihang chickens during growing period (P<0.05). Comprehensive the serum biochemical indexes, dietary metabolizable energy level was 11.5 MJ/kg, it can meet the energy requirement of Taihang chickens. In conclusion, considering all the indexes, the optimum dietary metabolizable energy level of Taihang chickens during growing period is 11.5 MJ/kg, and the optimum dietary crude protein level is 14% to 15%.