Key Laboratory of Arid and Grassland Ecology, Ministry of Education, School of Life Science, Lanzhou University, China.
Poult Sci. 2012 Jan;91(1):224-31. doi: 10.3382/ps.2011-01598.
The objective of this study was to evaluate the characteristics of lipid oxidation in the meat of free-range broilers feeding on grasshoppers in alpine rangeland on the Tibetan Plateau. Eighty 28-d-old Qinjiaoma male broilers were introduced into a rangeland where there was a dense population of grasshoppers (PB). Control birds were reared under intensive conditions and given a maize-soybean diet. At 91 d of age, 24 birds from each treatment were slaughtered. Fresh breast and thigh meats were packaged and refrigerated for determination. The results indicate that rearing conditions, which included a diet rich in grasshoppers for PB broilers, significantly (P < 0.05) affected α-tocopherol content, total iron, heme iron, and nonheme iron content in the muscle of both the breast and leg. Rearing system and diet also had an important effect on antioxidant activity and lipid oxidation during refrigerated storage. This influence changed with storage time between different tissues. The activities of glutathione peroxidase and superoxide dismutase in the muscle of chicken breasts or legs from PB broilers were significantly (P < 0.05) higher than those from the controls, but no significant (P > 0.05) differences were found for the activities of catalase between the PB broilers and the controls. In conclusion, the meat in free-range broilers feeding on grasshoppers has more antioxidative potential and longer storage life.
本研究旨在评估在青藏高原高山草甸上自由放养的以蝗虫为食的肉鸡的肉中脂质氧化的特征。将 80 只 28 日龄的秦嘉马雄性肉鸡引入蝗虫密度较高的草原（PB）。对照鸡在集约条件下饲养，给予玉米-大豆日粮。在 91 日龄时，从每个处理中宰杀 24 只鸡。新鲜的鸡胸肉和大腿肉进行包装并冷藏，以进行测定。结果表明，饲养条件，包括 PB 肉鸡的蝗虫丰富饮食，显著（P < 0.05）影响了肌肉中 α-生育酚、总铁、血红素铁和非血红素铁的含量。饲养系统和饮食对冷藏过程中的抗氧化活性和脂质氧化也有重要影响。这种影响随不同组织之间的储存时间而变化。PB 肉鸡鸡胸或鸡腿肌肉中的谷胱甘肽过氧化物酶和超氧化物歧化酶的活性显著（P < 0.05）高于对照组，但对照组和 PB 肉鸡之间的过氧化氢酶活性没有显著差异（P > 0.05）。总之，以蝗虫为食的自由放养肉鸡的肉具有更高的抗氧化潜力和更长的储存寿命。
