碩士 / 國立屏東科技大學 / 動物科學與畜產系所 / 104 / The trial was conducted to study the effects of dietary astaxanthin (AST) supplementation on laying performance, egg quality, and yolk characteristics of laying hens. A total of ninety Leghorn layers at 36 weeks of age were randomly assigned into 5 groups according to the egg production rate. Each group of hens had three replicates with 6 layers. A corn-soybean meal basal diet was offered in the control group; 4 experimental diets were added with 50, 100 and 500 ppm AST and 10 ppm Carophyll red®,respectively. All experimental diets contained 2900 kcal/kg ME and 17%crude protein. Feed and water were ad libitum. Hens fed with the experimental diets for 6 weeks and then all fed with control die for one week. The experimental period lased for 7 weeks. Feed intake, laying performance, egg quality and panel test were measured during the experimental period. The results indicated that hens fed with naturalpigment supplementation did not affect feed intake, hen-day egg production and body weight changes. Moreover, the hens fed with 500 ppm AST had significantly (P < 0.05) higher egg yolk percentage and egg white height(P < 0.05). A linear regression of egg yolk red color (P < 0.05) increased with the concentration of AST supplementation. In egg panel test, natural pigment supplementation was in creased purchasing intention(P < 0.05), especially for the high supplementation of AST and Carophyll red® treatments.Increasing AST supplementation gradually increased the concentration of astaxanthin and carotenoidsin the yolk (P < 0.05).Furthermore, hens fed with pigment supplementation had significantly higher antioxidant value (P < 0.05).In conclusion, the dietary pigment supplementation significantly increased red color of yolk and improved consumers purchasing intention. AST supplementation showed benefits to increase the additional value of egg product.
| Identifer | oai:union.ndltd.org:TW/104NPUS5289008 |
| Date | January 2016 |
| Creators | Su, Liang-Ju, 蘇亮如 |
| Contributors | Wu, Hsi-Hsun, 吳錫勳 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 84 |
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