本试验旨在研究1~28日龄饲粮代谢能（ME）和粗蛋白质（CP）水平对二郎山山地鸡生长性能、屠宰性能及肉品质的影响。采用3×3双因子完全随机试验设计，因子1为饲粮代谢能水平，设10.88、12.13和13.39 MJ/kg 3个水平；因子2为粗蛋白质水平，设16%、19%和22% 3个水平。将1日龄二郎山山地鸡1 620只随机分到9个组，每组6个重复，每个重复30只。1~28日龄各组分别饲喂9种不同代谢能和粗蛋白质水平饲粮，29~73日龄饲喂相同代谢能和粗蛋白质水平饲粮。试验期73 d。结果表明：1~28日龄饲粮代谢能水平对1~28日龄、29~49日龄和1~73日龄鸡只的平均日采食量及1~28日龄和1~73日龄料重比影响显著（P<0.05）；1~28日龄饲粮粗蛋白质水平对1~28日龄和50~73日龄平均增重，29~49日龄平均日采食量及1~28日龄、50~73日龄和1~73日龄的料重比影响显著（P<0.05）。1~28日龄饲粮代谢能与粗蛋白质水平对73日龄屠宰性能无显著影响（P>0.05）。1~28日龄饲粮代谢能水平对屠宰后45 min胸肌pH影响显著（P<0.05），同时饲粮粗蛋白质水平对屠宰后24 h胸肌L^*值影响显著（P<0.05）。1~28日龄饲粮代谢能水平对干物质、代谢能及粗蛋白质的表观利用率影响显著（P<0.05），均随代谢能水平的提高而提高；1~28日龄饲粮粗蛋白质水平对干物质、代谢能及粗蛋白质的表观消化率影响显著（P<0.05）。综上，以1~28日龄平均增重为指标，二郎山山地鸡1~28日龄饲粮适宜代谢能和粗蛋白质水平分别为10.88 MJ/kg和22%；以1~28日龄料重比为指标时，二郎山山地鸡1~28日龄饲粮适宜代谢能和粗蛋白质水平分别为13.39 MJ/kg和22%；综合29~73日龄生长性能，二郎山山地鸡1~28日龄饲粮适宜代谢能和粗蛋白质水平分别为12.13 MJ/kg和16%。1~28日龄饲粮粗蛋白质和代谢能水平对二郎山山地鸡的生长性能具有一定的后续效应，表现出补偿生长特点。

This study was conducted to investigate the effects of dietary metabolic energy (ME) and crude protein (CP) levels on growth performance, slaughter performance and meat quality of Erlang mountain chicken aged from 1 to 28 days. This experiment took a 3×3 factorial design with 3 ME levels (10.88, 12.13 and 13.39 MJ/kg) and 3 CP levels (16%, 19% and 22%). A total of 1 800 one-day-old chickens were randomly divided into 9 groups with 6 replicates per group and 30 chickens per replicate. The chickens in each group were fed 9 kinds of diets with different ME and CP levels during 1 to 28 days of age, respectively, and then fed the same diet with the same ME and CP levels during 29 to 73 days of age. The experiment lasted for 73 d. The results showed as follows: average daily feed intake of chickens during 1 to 28, 29 to 49 and 1 to 73 days of age and feed to gain ratio of chickens during 1 to 28 and 1 to 73 days of age were significantly affected by dietary ME level for 1 to 28 days of age (P<0.05). Average gain of chickens during 1 to 28 and 50 to 73 days of age and average daily feed intake of chickens during 1 to 28 days of age were significantly affected by dietary CP level for 1 to 28 days of age (P<0.05). And so was the feed to gain ratio of chickens during 1 to 28, 50 to 73 and 1 to 73 days of age (P<0.05). Slaughter performance of chickens aged 73 days was not significantly affected by dietary ME and CP levels for 1 to 28 days of age (P>0.05). Pectorales' pH at 45 min after slaughter was significantly affected by dietary ME level for 1 to 28 days of age (P<0.05). Pectorales' L^* value at 24 h after slaughter was significantly affected by dietary CP level for 1 to 28 days of age (P<0.05). Apparent utilization of dry matter, ME and CP was significantly affected by dietary ME level for 1 to 28 days of age (P<0.05), and increased with the increasing of ME level. Apparent utilization of dry matter, ME and CP was significantly affected by dietary CP level for 1 to 28 days of age (P<0.05). In conclusion, with index of the average weight at 1 to 28 days of age, the appropriate dietary ME and CP levels for Erlang mountain chicken aged 1 to 28 days are 10.88 MJ/kg and 22%, respectively. With index of the feed to gain ratio at 1 to 28 days of age, the appropriate dietary ME and CP levels for Erlang mountain chicken aged 1 to 28 days are 13.39 MJ/kg and 22%, respectively. With index of the growth performance at 29 to 73 days of age, the appropriate dietary ME and CP levels for Erlang mountain chicken aged 1 to 28 days are 12.13 MJ/kg and 16%, respectively. There is a subsequent effect on growth performance of mountain chicken by dietary ME and CP levels for 1 to 28 days of age, and shows a characteristic of compensatory growth.