Department of Animal Science and Biotechnology, Chungnam National University, Yuseong-gu, Daejeon, South Korea.
Biol Trace Elem Res. 2012 Jun;147(1-3):120-9. doi: 10.1007/s12011-011-9282-8. Epub 2011 Dec 14.
Zinc (Zn) is an essential mineral for animal development and function. A study was carried out to evaluate the effect of sex and dietary organic zinc (OZ) on growth performance, carcass traits, tissue mineral content, and blood parameters of broiler chickens. A total of 240 1-day-old male and 240 female broiler chicks (Cobb × Cobb) were assigned to two dietary levels of OZ (2 × 2 factorial) with six replicates per treatment (20 birds/replicate pen). The OZ supplementation levels were 0 and 25 ppm. Results showed that OZ supplementation did not affect the growth performance of male and female broilers, but the males showed significantly better (P < 0.05) growth performance than females did. Similarly, OZ supplementation did not affect the thickness of both the back and thigh skin of male and female broilers; however, males had thicker skin than females. Dietary OZ supplementation did not affect collagen contents in the skin and meat samples. Male broilers had higher skin collagen contents than females, but no sex difference was found in meat collagen contents. OZ supplementation did not affect the shear force values of skin and meat samples. Male broilers had higher shear force values of back skin than females, but not in the meat samples. Dietary OZ supplementation increased (P < 0.05) the thigh meat Zn content in both sexes. The plasma Ca content was significantly (P < 0.05) increased by dietary OZ supplementation; however, other blood parameters were not affected by dietary OZ supplementation. Males had higher plasma glucose and cholesterol content than females. It is concluded that dietary OZ supplementation at the level of 25 ppm does not affect the growth performance and skin quality of broiler chickens but increases the Zn content in thigh meat and Ca content in plasma of broiler chickens. Male broilers had better growth performance and skin quality than females.
锌（Zn）是动物发育和功能所必需的矿物质。本研究旨在评估性别和日粮有机锌（OZ）对肉鸡生长性能、胴体性状、组织矿物质含量和血液参数的影响。将 240 只 1 日龄雄性和 240 只雌性肉鸡（科宝×科宝）分为两种 OZ 日粮水平（2×2 析因），每个处理有 6 个重复（每个重复 20 只鸡/笼）。OZ 添加水平分别为 0 和 25 ppm。结果表明，OZ 添加并未影响雄性和雌性肉鸡的生长性能，但雄性肉鸡的生长性能明显优于雌性肉鸡（P<0.05）。同样，OZ 添加并未影响雄性和雌性肉鸡背部和大腿皮肤的厚度；然而，雄性肉鸡的皮肤比雌性肉鸡更厚。日粮 OZ 添加不影响皮肤和肌肉样本中的胶原蛋白含量。雄性肉鸡的皮肤胶原蛋白含量高于雌性肉鸡，但肌肉胶原蛋白含量无性别差异。OZ 添加不影响皮肤和肌肉样本的剪切力值。雄性肉鸡背部皮肤的剪切力值高于雌性肉鸡，但在肌肉样本中则不然。日粮 OZ 添加增加了（P<0.05）雌雄肉鸡大腿肉的 Zn 含量。日粮 OZ 添加显著（P<0.05）增加了血浆 Ca 含量；然而，其他血液参数不受日粮 OZ 添加的影响。雄性肉鸡的血浆葡萄糖和胆固醇含量高于雌性肉鸡。综上所述，日粮 OZ 添加 25 ppm 水平不会影响肉鸡的生长性能和皮肤质量，但会增加大腿肉的 Zn 含量和血浆 Ca 含量。雄性肉鸡的生长性能和皮肤质量优于雌性肉鸡。
