中国8个不同来源DDGS蛋公鸡氨基酸代谢率及评价方法相关性研究

 【目的】寻求快速评价DDGS氨基酸代谢率的方法，为家禽生产中合理利用DDGS资源提供科学依据。【方法】选择45只、（2.6±0.2）kg的健康成年海兰褐蛋种公鸡，采用2×9不完全拉丁方设计，随机分为9个处理组，每组5个重复，每个重复1只鸡，进行2期代谢试验。用无氮饲粮法测定了中国8个不同来源DDGS（A—H）的氨基酸代谢率，并研究其与DDGS的色泽和水溶物含量的相关性。【结果】8个DDGS的总氨基酸表观代谢率和真代谢率范围分别为60.18%—74.06%和74.13%—89.15%，赖氨酸表观代谢率低于60%，真代谢率为63.08%—82.07%。DDGS的水溶物含量与赖氨酸真代谢率存在高度正相关（R²=0.7601）。【结论】不同来源DDGS间的各种氨基酸代谢率有不同程度的差异，通过测定DDGS的水溶物含量可以初步估测鸡赖氨酸真代谢率。

Study on Amino Acids Metabolizability and Its Correlation of Evaluation Methods for Adult Roosters of Eight DDGS from Different Resources in China

【Objective】A method for rapiding evaluationthe of amino acid metabolizability in DDGS was found to provide scientific basis of rational utilization in DDGS on roosters. 【Method】 45 Hyline brown adult roosters, average body weight (2.6±0.2) kg, were randomly allocatted into 9 groups with 5 replicates per treatment, A 2×9 Youden Square design was carried out for two periods metabolism experiment to determine amino acid metabolizability of 8 DDGS from different sources in China by N-free diet methods and researched the amino acid metabolizability correlation with the DDGS color and water solubles matter. 【Result】 The range of the 8 DDGS total amino acids apparent metabolizability and true metabolizability is 60.18%—74.06% and 74.13%—89.15%, the lysine apparent metabolizability is lower than 60% and true metabolizability is from 63.08% to 82.07%. There is high positive correlation between water solubles matter and lysine true metabolizability (R2 = 0.7601).【Conclusion】The results indicate that there are variations of amino acids metabolizability between DDGS from different sources. Lysine true metabolizability of DDGS on poultry can be estimated by determining their water solubles matter.