Reda Fayiz M, Swelum Ayman A, Hussein Elsayed O S, Elnesr Shaaban S, Alhimaidi Ahmad R, Alagawany Mahmoud
Poultry Department, Faculty of Agriculture, Zagazig University, Zagazig 44519, Egypt; fayizreda yahoo.com.
Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh 11451, Saudi Arabia.
Animals (Basel). 2020 Oct 9;10(10):1839. doi: 10.3390/ani10101839.
The present study was carried out to study the effects of varying dietary DL-methionine (0, 0.5, 1.5, 2.5, and 3.5 g/kg) levels on the productive and reproductive performance, egg quality and blood biochemical parameters of quail breeders. In total, 150 mature Japanese quails at eight weeks of age were randomly allotted to five groups of 30 for each group. Each group included five replicates, each of six quails (four females and two males). The results showed that egg number, egg weight and egg mass were higher ( 0.05) with the addition of all DL-methionine levels than that of the control group. Quails from the control group had a lower feed intake ( < 0.001) and a worse feed conversion ratio (FCR) than those from the DL-methionine-treated groups. Supplementation of DL-methionine up to 2.5 g/kg in quail diets increased fertility and hatchability percentages. Birds fed DL-methionine at 1.5 g/kg had the best egg production indices, better FCR and the highest values of fertility and hatchability. Egg weight, yolk %, Haugh unit, egg shape index and unit surface shell weight (USSW) were increased and eggshell % was decreased in quail supplemented with DL-methionine levels compared with the control quail ( 0.05). Dietary DL-methionine levels did not affect ( > 0.05) the hemoglobin (Hb), red blood cells (RBCs), white blood cells (WBCs) and packed cell volume (PCV) of quails. DL-methionine levels (0.5 and 2.5 g/kg) augmented lymphocytes and basophile ( 0.05). Low DL-methionine levels (0.5 or 1.5 g/kg) improved liver enzymes and kidney functions. Dietary DL-methionine levels (except 3.5 g/kg) declined serum lactate dehydrogenase (LDH) and decreased lipid profile parameters (except high-density lipoprotein-HDL). Supplementation of DL-methionine at 0.5 and 1.5 g/kg increased immunoglobulin (IgG, IgM and IgA) and superoxide dismutase (SOD), total antioxidant capacity (TAC), catalase (CAT) and reduced glutathione (GSH) ( 0.001) compared with the control. In conclusion, dietary supplementation of DL-methionine (1.5 g/kg) can enhance the reproductive performance and egg quality of quail breeders. DL-methionine use at levels of 0.5 or 1.5 g/kg improved the liver and kidney functions, lipid profile, immunity and antioxidant parameters of Japanese quail.
本研究旨在探讨不同日粮 DL-蛋氨酸水平（0、0.5、1.5、2.5 和 3.5 g/kg）对鹌鹑种蛋生产性能、繁殖性能、蛋品质及血液生化参数的影响。总共 150 只 8 周龄的日本成年鹌鹑被随机分为 5 组，每组 30 只。每组包括 5 个重复，每个重复 6 只鹌鹑（4 只雌性和 2 只雄性）。结果表明，添加所有 DL-蛋氨酸水平组的产蛋数、蛋重和产蛋量均高于对照组（P<0.05）。对照组鹌鹑的采食量较低（P<0.001），饲料转化率（FCR）也比 DL-蛋氨酸处理组差。在鹌鹑日粮中添加高达 2.5 g/kg 的 DL-蛋氨酸可提高受精率和孵化率。饲喂 1.5 g/kg DL-蛋氨酸的鹌鹑产蛋指标最佳，FCR 更好，受精率和孵化率最高。与对照鹌鹑相比，添加 DL-蛋氨酸水平的鹌鹑蛋重、蛋黄百分比、哈氏单位、蛋形指数和单位表面积蛋壳重量（USSW）增加，蛋壳百分比降低（P<0.05）。日粮 DL-蛋氨酸水平对鹌鹑的血红蛋白（Hb）、红细胞（RBC）、白细胞（WBC）和血细胞比容（PCV）没有影响（P>0.05）。DL-蛋氨酸水平（0.5 和 2.5 g/kg）可增加淋巴细胞和嗜碱性粒细胞（P<0.05）。低 DL-蛋氨酸水平（0.5 或 1.5 g/kg）可改善肝功能和肾功能。日粮 DL-蛋氨酸水平（3.5 g/kg 除外）可降低血清乳酸脱氢酶（LDH），并降低血脂参数（高密度脂蛋白-HDL 除外）。与对照组相比，添加 0.5 和 1.5 g/kg 的 DL-蛋氨酸可增加免疫球蛋白（IgG、IgM 和 IgA）、超氧化物歧化酶（SOD）、总抗氧化能力（TAC）、过氧化氢酶（CAT）和还原型谷胱甘肽（GSH）（P<0.001）。总之，日粮添加 DL-蛋氨酸（1.5 g/kg）可提高鹌鹑种蛋的繁殖性能和蛋品质。0.5 或 1.5 g/kg 水平的 DL-蛋氨酸可改善日本鹌鹑的肝功能、肾功能、血脂、免疫力和抗氧化参数。
