Mehri Mehran, Sargazi Mohsen, Ghazaghi Mahmoud, Bagherzadeh-Kasmani Farzad, Asghari-Moghadam Morteza, Behboodi Hamid-Reza, Rokouei Mohammad
Department of Animal Sciences, Faculty of Agriculture, University of Zabol, Sistan, 98661-5538, Iran.
Department of Animal Sciences, Faculty of Agriculture, University of Zabol, Sistan, 98661-5538, Iran.
Poult Sci. 2025 May 28;104(9):105346. doi: 10.1016/j.psj.2025.105346.
Available phosphorus (AP) is a crucial nutrient for laying quails, influencing eggshell quality and overall production performance. This study investigated the optimal levels of dietary AP in laying quails from 10 to 16 weeks of age. A total of 375 laying quails were used in a completely randomized design with five experimental diets (0.25, 0.30, 0.35, 0.40, and 0.45 % AP) and five replicates. Dietary AP levels did not affect feed intake, feed conversion ratio (FCR), egg mass (EM), or egg production (EP) percentage (P > 0.05). Egg characteristics were influenced by AP levels, with significant effects observed for egg width (P = 0.011), egg volume (P = 0.025), and shell thickness (P = 0.041), all displaying linear trends. Serum alkaline phosphatase (ALP) concentration exhibited a nonlinear response, decreasing with increasing AP levels, supporting an estimated AP requirement of 0.357 % based on the broken-line model. Estimated P requirements indicated that optimal AP levels for FCR, EP, and ALP were 0.374 %, 0.383 %, and 0.357 %, respectively. Overall, an AP level of approximately 0.38 % was identified as optimal for maximizing egg production while maintaining efficient feed utilization and eggshell quality in laying quails.
有效磷（AP）是产蛋鹌鹑的一种关键营养素，会影响蛋壳质量和总体生产性能。本研究调查了10至16周龄产蛋鹌鹑日粮中AP的最佳水平。总共375只产蛋鹌鹑被用于完全随机设计，设有五种实验日粮（AP含量分别为0.25%、0.30%、0.35%、0.40%和0.45%），每个处理设五个重复。日粮AP水平对采食量、饲料转化率（FCR）、蛋重（EM）或产蛋率（EP）百分比没有影响（P>0.05）。蛋的特性受AP水平影响，蛋宽（P = 0.011）、蛋体积（P = 0.025）和蛋壳厚度（P = 0.041）均有显著影响，且都呈现线性趋势。血清碱性磷酸酶（ALP）浓度呈现非线性反应，随AP水平升高而降低，根据折线模型估计AP需求量为0.357%。估计的磷需求量表明，FCR、EP和ALP的最佳AP水平分别为0.374%、0.383%和0.357%。总体而言，对于产蛋鹌鹑，约0.38%的AP水平被确定为在维持高效饲料利用和蛋壳质量的同时使产蛋量最大化的最佳水平。
