Pourmollaei Fahimeh, Ghazaghi Mahmoud, Rokouei Mohammad, Bagherzadeh-Kasmani Farzad, Mehri Mehran
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 Feb;104(2):104700. doi: 10.1016/j.psj.2024.104700. Epub 2024 Dec 20.
An experiment was conducted to estimate the optimal calcium (Ca) requirement for growth performance and bone health in quail from 21 to 35 days posthatch. Five dietary treatments containing 0.45, 0.60, 0.75, 0.90, and 1.05 % Ca were evaluated in a completely randomized design with 6 replicates per treatment and 12 birds per pen. Body weight gain (BW gain; P = 0.04), tibia-Ca (P = 0.01), tibia ash (P = 0.01), and bone breaking strength (BBS; P = 0.01) increased quadratically with increasing dietary Ca levels, while feed conversion ratio (FCR) showed a tendency to decrease (P = 0.07). Based on the statistical model, the optimal Ca requirements for BW gain and FCR were estimated to range from 0.75 to 0.84 % and 0.74 to 0.83 %, respectively. The Ca requirements for the Seedor index, tibia mass, and tibia length were estimated to range from 0.83 to 0.87 %, 0.81 to 0.87 %, and 0.78 to 0.86 %, respectively. The corresponding values for tibia-Ca, tibia ash, and BBS ranged from 0.67 to 0.73 %, 0.68 to 0.73 %, and 0.75 to 0.83 %, respectively. The study revealed that Ca requirements for optimal bone density may exceed those for growth performance, indicating the need for dietary Ca recommendations to be influenced by bone health considerations. These findings suggest that dietary calcium levels between 0.75 % and 0.87 % are optimal for growth performance and bone health in quail during the post-hatch growth period, with higher levels potentially required to maximize bone density and strength.
进行了一项实验，以估计雏鹌鹑出壳后21至35天生长性能和骨骼健康所需的最佳钙（Ca）含量。采用完全随机设计，评估了五种钙含量分别为0.45%、0.60%、0.75%、0.90%和1.05%的日粮处理，每个处理6个重复，每栏12只鸟。随着日粮钙水平的增加，体重增加（BW增加；P = 0.04）、胫骨钙（P = 0.01）、胫骨灰分（P = 0.01）和骨骼断裂强度（BBS；P = 0.01）呈二次增加，而饲料转化率（FCR）呈下降趋势（P = 0.07）。根据统计模型，估计体重增加和饲料转化率的最佳钙需求量分别为0.75%至0.84%和0.74%至0.83%。种蛋指数、胫骨质量和胫骨长度的钙需求量估计分别为0.83%至0.87%、0.81%至0.87%和0.78%至0.86%。胫骨钙、胫骨灰分和骨骼断裂强度的相应值分别为0.67%至0.73%、0.68%至0.73%和0.75%至0.83%。该研究表明，最佳骨密度所需的钙含量可能超过生长性能所需的钙含量，这表明日粮钙推荐需要考虑骨骼健康因素。这些发现表明，日粮钙水平在0.75%至0.87%之间对雏鹌鹑出壳后生长阶段的生长性能和骨骼健康最为适宜，可能需要更高的钙水平来最大化骨密度和强度。
