Dietary supplementation with tryptophan improves the production and growth performance of breeding pigeons under 2+4 model
文献类型： 外文期刊
作者： Zheng, S. 1 ; Yan, K. 1 ; Tang, Y. 1 ; Zhang, W. 1 ; Zhang, Y. 1 ; Huang, W. 1 ; Yang, M. 1 ; Lu, H. 1 ; Li, Z. 1 ; He, Y. 1 ; Gou, Z. 2 ; Wang, Z. 3 ; Wang, J. 4 ; Li, Z. 1 ; Xu, X. 5 ; Gao, H. 1 ; Zhou, S. 1 ; Lv, Y. 1 ; Wang, W. 1 ; Huang, Y. 1 ; Peng, J. 1 ;
作者机构： 1.Zhongkai Univ Agr & Engn, Innovat Inst Anim Hlth Breeding, Coll Anim Sci & Technol, Coll Light Ind & Food Sci, Guangzhou 510225, Guangdong, Peoples R China
2.Minist Agr & Rural Affairs, Guangdong Acad Agr Sci, State Key Lab Livestock & Poultry Breeding, Guangdong Prov Key Lab Anim Breeding & Nutr,Inst A, Guangzhou, Guangdong, Peoples R China
3.Meizhou Jinlv Modern Agr Dev Co Ltd, Meizhou, Guangdong, Peoples R China
4.Guangdong Haid Grp Co Ltd, Anim Husb & Fisheries Res Ctr, Guangzhou, Guangdong, Peoples R China
5.Zhongshan Shiqi Pigeon Breeding Co Ltd, Zhongshan, Guangdong, Peoples R China
关键词： Tryptophan; breeding pigeons; squab; performance; reproductive metabolism
期刊名称：BRITISH POULTRY SCIENCE （ 影响因子：1.7； 五年影响因子：2.1 ）
ISSN： 0007-1668
年卷期： 2025 年
页码：
收录情况： SCI
摘要： 1. This study evaluated the effectiveness of different concentrations of tryptophan in the diet on reproductive performance, body weight loss and plasma biochemical indices of breeding pigeons. It included growth performance, carcass characteristics, meat quality and plasma biochemical indices of squabs.2. In this study, 360 pairs of Mimas breeding pigeons were randomly divided into six experimental groups based on the dietary tryptophan content. The pigeons with four squabs were fed diets containing 0.10%, 0.14%, 0.18%, 0.22%, 0.26% and 0.30% tryptophan (Trp) for 50 d.3. The results showed that dietary Trp supplementation increased egg-laying rate of breeding pigeons curvilinearly, with the highest rate occurring in the 0.18-0.30% group. The FCR of squabs showed a linear and quadratic trend and the 0.26% Trp group was the lowest. The increase in semi-eviscerated and eviscerated weight of squabs showed a curvilinear trend and the best slaughter performance of squabs was observed in the 0.26% Trp group.4. The 0.22-0.30% Trp supplementation resulted in an improvement in meat colour. Plasma biochemical index results showed that Trp supplementation significantly improved metabolic function in squabs and the best indices were observed in the 0.22-0.30% Trp group.5. A regression model was established using reproductive and growth performance indexes. Laying rate of breeding pigeons was highest during incubation and lactation periods at 0.210-0.272% Trp supplementation. At this rate, the level of oxidative stress in squabs was reduced, which improved growth.
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