Sahin K, Kucuk O
Department of Animal Nutrition, Veterinary Faculty, University of Fýrat, 23119 Elazýg, Turkey.
J Anim Physiol Anim Nutr (Berl). 2001 Dec;85(11-12):335-41. doi: 10.1046/j.1439-0396.2001.00339.x.
This study was conducted to determine the effects of vitamin C (L-ascorbic acid) and vitamin E (DL-alpha-Tocopheryl acetate) on performance, digestion of nutrients and carcass characteristics of Japanese quails reared under chronic heat stress (34 degrees C). A total of 180 10-day-old Japanese quails were randomly assigned to six treatment groups, three replicates of 10 birds each. The birds with a 2 x 3 factorial design received either two levels of vitamin C (100 and 200 mg/kg of diet) or three levels of vitamin E (125, 250, or 500 mg/kg of diet). Then, 200-mg vitamin C/kg of diet, compared with that of 100 mg/kg of diet, and higher dietary vitamin E inclusions resulted in a higher performance. The interaction between vitamin C and vitamin E for final body weight change (p=0.01) and feed efficiency (p=0.02) was detected. Final body weight change and feed efficiency increased to a higher extent by increasing dietary vitamin C when higher vitamin E levels were fed. Carcass characteristics improved with an increase of both dietary vitamin C and vitamin E (p=0.004). The interactions on carcass characteristics were all significant (p=0.02) and manifested themselves in a way that they were improved to a higher extent by an increase of dietary vitamin C when higher vitamin E levels were fed. Digestibility of nutrients (DM, OM, CP and EE) was greater with higher dietary vitamin C (p < 0.02) and also with higher vitamin E (p=0.07). There were no interactions detected for digestibility of nutrients (p=0.32). Taken together, the results of the present study conclude that a combination of 200 mg of vitamin C and 250 mg of vitamin E provides the greatest performance in Japanese quails reared under heat stress and can be considered as a protective management practice in poultry diet, alleviating the negative effects of heat stress.
本研究旨在确定维生素C（L-抗坏血酸）和维生素E（DL-α-生育酚乙酸酯）对在慢性热应激（34摄氏度）条件下饲养的日本鹌鹑的生产性能、养分消化率和胴体特性的影响。总共180只10日龄的日本鹌鹑被随机分配到六个处理组，每组10只，重复三次。采用2×3析因设计，鹌鹑分别接受两种水平的维生素C（100和200毫克/千克日粮）或三种水平的维生素E（125、250或500毫克/千克日粮）。然后，与日粮中维生素C含量为100毫克/千克相比，日粮中维生素C含量为200毫克/千克以及日粮中维生素E添加量较高时，鹌鹑的生产性能更高。检测到维生素C和维生素E对最终体重变化（p=0.01）和饲料效率（p=0.02）存在交互作用。当饲喂较高水平的维生素E时，通过增加日粮中维生素C的含量，最终体重变化和饲料效率提高的幅度更大。随着日粮中维生素C和维生素E含量的增加，胴体特性得到改善（p=0.004）。在胴体特性方面的交互作用均显著（p=0.02），其表现为当饲喂较高水平的维生素E时，通过增加日粮中维生素C的含量，胴体特性改善的幅度更大。日粮中维生素C含量较高时，养分（干物质、有机物、粗蛋白和粗脂肪）的消化率更高（p<0.02），维生素E含量较高时，养分消化率也更高（p=0.07）。在养分消化率方面未检测到交互作用（p=0.32）。综上所述，本研究结果表明，在热应激条件下饲养的日本鹌鹑中，200毫克维生素C和250毫克维生素E的组合可提供最佳生产性能，可被视为家禽日粮中的一种保护性管理措施，减轻热应激的负面影响。
