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对中国７个地方品种鸡（含２个杂种）８４日龄胸肌水分、粗蛋白、粗脂肪、灰分、钙、磷含量进行了研究分析。结果表明，胸肌中各常量化学成分含量范围为：水分７３．００％～７３．９１％，蛋白质２４．１９％～２５．２０％，脂肪０．２５７％～０．５４７％，灰分１．１３１％～１．１８１％，磷２３２９～２４４７ｍｇ／ｋｇ，钙１１１．２～１２９．５ｍｇ／ｋｇ。除肌间脂肪外，胸肌中各常量化学成分含量在部分品种间存在差异，就其常量养分营养价值，５个地方鸡品种顺序为乌骨鸡＞肖山鸡＞狼山鸡＞油鸡＞白耳鸡；肌肉的多汁性、风味和嫩度，其顺序为乌骨鸡＞油鸡＞白耳鸡＞肖山鸡＞狼山鸡。性别仅对８４日龄肌肉水分有明显影响，对其他常量化学成分影响不大。
The water, crude protein, crude fat, ash, calcium and phosphorus content of chest muscle of 84 local breeds of chicken (including 2 hybrids) in China were studied. The results showed that the content of each constant chemical component in the chest muscle ranged from 73.00% to 73.91% moisture, from 24.19% to 25.20% protein, from 0.257% to 0.547% fat, and from 1.131% % ~ 1.181%, phosphorus 2329 ~ 2447mg / kg, calcium 111.2 ~ 129.5mg / kg. Except for intermyosteric fat, the content of each constant chemical component in the muscle of the pectoralis was different among some of the cultivars. In terms of their nutritional value of the macronutrients, the order of the five local chicken breeds was Silky> Chrysalis> Wolfhan> Ear chicken; muscle juicy, flavor and tenderness, the order of Silky> You chicken> white ear chicken> Shaw chicken> Wolf mountain chicken. Sex only had a significant effect on muscle moisture at 84 days of age, but had little effect on other constant chemical components.