Optimal Standardized Ileal Digestible Arginine to Lysine Ratio for Japanese Quails in the Egg-Laying Phase

ABSTRACT This study was conducted to determine the optimal standardized ileal digestible arginine to lysine (SID Arg:Lys) ratio for Japanese quails in the egg-laying phase. A total of two hundred forty-five 35-week-old Japanese quails (181 ± 1.30 g initial body weight) were randomly assigned to five treatment groups with seven replicates of seven quails. Graded levels of L-Arginine were added to a basal diet in order to produce five SID Arg:Lys ratios (101, 106, 111, 116 and 121%). Collected data were analyzed as one-way ANOVA and optimal ratio was estimated using polynomial regression model (linear and quadratic) based on performance traits. Statistical differences were considered for p<0.05. Graded SID Arg:Lys ratios did not affect performance traits assessed. Based on results, the SID Arg:Lys ratio of 101% is sufficient to warrant proper performance of Japanese quails in the egg-laying phase.

摘要 本试验旨在确定产蛋期日本鹌鹑的标准化回肠可消化精氨酸与赖氨酸（standardized ileal digestible arginine to lysine，SID Arg:Lys）最优比值。试验共选取245只35周龄、初始体重为181±1.30g的日本鹌鹑，随机分为5个处理组，每组设置7个重复，每个重复包含7只鹌鹑。在基础日粮中添加梯度水平的L-精氨酸，以配制得到5种SID Arg:Lys比值（101%、106%、111%、116%及121%）的试验日粮。试验数据采用单因素方差分析（one-way ANOVA）进行统计，并基于生产性能指标通过线性与二次多项式回归模型估算最优比值。统计显著性判定标准为p<0.05。梯度SID Arg:Lys比值对本次评估的各项生产性能指标无显著影响。基于本试验结果，产蛋期日本鹌鹑的SID Arg:Lys比值为101%即可保障其正常生产性能。