College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
Poult Sci. 2012 Aug;91(8):1869-78. doi: 10.3382/ps.2011-02059.
This experiment was carried out to investigate effects of maternal ME and CP levels on growth performance, carcass traits, and meat quality of broiler offspring. A total of 1,134 thirty-week-old Chinese Yellow broiler breeders was randomly assigned to 3 dietary ME levels (11.09, 11.51, and 11.92 MJ/kg) and 3 CP levels (15.5, 16.5, and 17.5%) in a 3×3 factorial arrangement. Each dietary treatment had 6 replicates with 21 hens per replicate. At 39 wk of age, 30 settable eggs per replicate were selected for hatching. All broiler offspring were fed the same diets. There were significant ME×CP interactions in egg CP and ether extract (EE) contents, BW at d 1, 22 to 42 d ADG, ADFI during 1 to 21 d and 43 to 63 d, shear force, plasma albumin, cholesterol, and triglycerides contents of broiler offspring. Dietary ME at 11.92 MJ/kg increased average egg weight, egg EE content, and broiler 1-d-old BW compared with 11.09 MJ/kg group at 16.5%, 15.5%, and 17.5% CP levels, respectively (P<0.05). Maternal 11.51 and 11.92 MJ/kg of ME increased 1 to 21-d ADFI, and 11.51 MJ/kg of ME decreased lightness (L*) value of broiler offspring compared with 11.09 MJ/kg group at 17.5 and 16.5% CP levels, respectively (P<0.05). Broiler breeder dietary CP at 17.5% decreased egg EE content, increased average egg weight, egg CP content, BW at d 1, and 1 to 21-d ADFI of broiler offspring compared with 15.5% CP group at 11.92 MJ/kg of ME level (P<0.05). Maternal dietary 15.5% CP increased dressing percentage and decreased yellowness (b*) value of broiler offspring compared with 16.5% and 17.5% CP groups at 11.51 MJ/kg of ME level, respectively (P<0.05). Collectively, the results indicate that maternal diets composed of 11.51 to 11.92 MJ/kg of ME and 17.5% CP at 39 wk of age increased growth performance during 1 to 21 d in Chinese Yellow broiler, whereas 11.51 MJ/kg of ME and 15.5% CP improved carcass dressing percentage and meat color of their offspring.
本实验旨在研究母本 ME 和 CP 水平对肉鸡后代生长性能、胴体性状和肉质的影响。选用 1134 只 30 周龄中国黄羽肉鸡母鸡，采用 3 种 ME（11.09、11.51 和 11.92MJ/kg）和 3 种 CP（15.5、16.5 和 17.5%）水平的 3×3 完全析因设计，每个处理设 6 个重复，每个重复 21 只母鸡。在 39 周龄时，每个重复选取 30 枚可孵化的鸡蛋。所有肉鸡后代均饲喂相同的日粮。ME×CP 存在互作效应对蛋 CP 和乙醚提取物（EE）含量、1 日龄 BW、22-42 日龄 ADG、1-21 日龄和 43-63 日龄 ADFI、剪切力、血浆白蛋白、胆固醇和甘油三酯含量有显著影响。与 11.09MJ/kg 组相比，11.92MJ/kg ME 组在 16.5%、15.5%和 17.5%CP 水平下，蛋 EE 含量和肉鸡 1 日龄 BW 均增加（P<0.05）。ME 为 11.51 和 11.92MJ/kg 组在 17.5%CP 水平下增加了 1-21 日龄 ADFI，11.51MJ/kg ME 组降低了肉鸡后代的亮度值（L*）（P<0.05）。与 15.5%CP 组相比，17.5%CP 组降低了蛋 EE 含量，增加了蛋重、蛋 CP 含量、1 日龄 BW 和 1-21 日龄 ADFI（P<0.05）。11.92MJ/kg ME 组，母本日粮 CP 为 15.5%，增加了肉鸡后代的出肉率，降低了黄度值（b*）（P<0.05）。与 16.5%和 17.5%CP 组相比，11.51MJ/kg ME 组 CP 为 15.5%，提高了肉鸡后代的肉色。总的来说，39 周龄时，母本日粮 ME 为 11.51-11.92MJ/kg、CP 为 17.5%可提高中国黄羽肉鸡 1-21 日龄的生长性能，而 ME 为 11.51MJ/kg、CP 为 15.5%可改善其后代的胴体出肉率和肉质颜色。
