Effects of Dietary Supplementation of Organic Selenium on Reproductive Performances of Roosters.

• Main Authors: ChiaHua, 陳嘉華
• Other Authors: How-Hong Hsieh, Ph. D
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/19430518468442525035

碩士 === 國立屏東科技大學 === 畜產系 === 92 === Abstract The objectives of this study were to investigate the effects of organic selenium supplementation on reproductive performances, sperm selenium content, and semen lipid peroxidation of the native chicken roosters. In the experiment, 24 roosters at 45 weeks of age were randomly distributed into 4 treatment groups with six individually caged birds in each group. Four levels of organic Se supplementation at 0, 0.2, 0.4, and 0.6 ppm were added to the diet of each treatment group. The criteria of semen characteristics, sperm mortality, and sperm morphology were measured after birds were fed on the experimental diets for 4, 8, and 16 weeks. The fertility, hatchability, sperm selenium content, and semen peroxidation from the experimental roosters were measured after 16 weeks of the experimental period. Results showed that roosters fed diet supplemented with 0.4 ppm organic Se, were higher in semen volume after 16 weeks. Roosters diets supplemented with 0.4 ppm and 0.6 ppm organic Se supplemented diets, were higher in semen concentration than that of control after 8 weeks. Roosters fed diets supplemented with organic Se increased sperm motility after 4 weeks. In the sperm mortality, diet supplemented with organic Se decreased sperm mortality after 8 weeks (P＜0.05); and those supplemented with 0.4 ppm organic Se diet had the lowest mortality. Sperm mortality decreased as experimental periods increased in organic Se treatment groups. In the morphology of sperm, middle piece abnormality of sperm decreased as experimental periods increased in control group. Diets supplemented with organic Se decreased middle piece abnormality of sperm, tail abnormamlity of sperm, and sperm corkscrew significantly after 8 weeks (P＜0.05), whereas the groups supplemented with 0.4ppm organic Se diet had the most significant effect. When organic Se was supplemented in the rooster diets, sperm Se content and fertility were increased significantly, whereas semen lipid peroxidation was decreased signicantly (P＜0.05). There were highly significant positive correlation coefficients between sperm Se content and sperm motility (P＜0.01) ; and negatively correlated with sperm mortality, middle piece abnormality of sperm, tail abnormality of sperm, sperm corkscrew and semen lipid peroxidation (P＜0.01). These results suggested that diets supplemented with organic Se at 0.4 ppm increased sperm motility, decreased sperm mortality, sperm abnormality, and semen lipid peroxidation, therefore had positive effects on the improvement of sperm quality of roosters.