Prabakar Govinthasamy, Gopi Marappan, Kolluri Gautham, Rokade Jaydip Jaywant, Khillare Gautham, Pearlin Beulah V, Jadhav Sunil Ekanath, Tyagi Jagbir Singh, Mohan Jag
Division of Avian Physiology and Reproduction, ICAR-Central Avian Research Institute, Izatnagar, 243122, India.
Livestock Farm Complex, Veterinary College and Research Institute, Udumalpet, 642 126, India.
Biol Trace Elem Res. 2021 Dec;199(12):4721-4730. doi: 10.1007/s12011-021-02590-9. Epub 2021 Jan 26.
A biological study was conducted to explore the effect of zinc-methionine (Zn-Met) supplementation on productive, reproductive, and immunological response in broiler breeders. Adult healthy 45-week breeder males (192) and females (288) were used in a completely randomized design. Birds were randomly divided into four treatments consisting of six replicates and fed basal diet (control, 40 mg/kg), basal diet supplemented with Zn-Met 20 (T1), 40 (T2), and 60 mg/kg (T3). There was no effect (P > 0.05) on body weight and feed consumption among the breeders due to the supplementation of organic Zn. The T3 group had significantly (P < 0.05) higher semen volume, sperm motility, concentration, and live sperm count. The seminal plasma calcium and alkaline phosphatase activity were higher (P < 0.05), and total cholesterol and aspartate transaminase levels were low in the T3 group. Birds fed with additional supplementation of Zn (60 mg/kg) had improved both cellular and humoral immunity. Throughout the experimental period, the hen day egg production was comparable (P > 0.05) among the experimental groups. Organic Zn-supplemented group showed significant difference in both the internal and external egg qualities-albumen, yolk index, and shell thickness. The higher dose of organic Zn-fed groups had a significant difference in estrogen and progesterone concentration, and the highest testosterone concentration was observed in the T2 group. Supplementary organic Zn had a significant effect on the concentration of Zn and Cu in the seminal plasma. Serum Zn and Cu concentration was significantly increased due to the supplementation of organic zinc in both male and female breeders. The fertility and hatchability percentage were higher (P < 0.05) in the T2 group. It could be concluded that the additional supplementation of organic Zn (zinc-methionine) at 40 mg/kg to the basal diet improved the reproductive performance in broiler breeders.
进行了一项生物学研究，以探讨补充蛋氨酸锌（Zn-Met）对肉种鸡生产性能、繁殖性能和免疫反应的影响。选用45周龄健康成年种公鸡（192只）和种母鸡（288只），采用完全随机设计。将鸡随机分为四个处理组，每组六个重复，分别饲喂基础日粮（对照组，40 mg/kg）、添加20（T1）、40（T2）和60 mg/kg蛋氨酸锌（T3）的基础日粮。补充有机锌对种鸡的体重和采食量没有影响（P＞0.05）。T3组的精液量、精子活力、精子浓度和活精子数显著更高（P＜0.05）。T3组精浆钙和碱性磷酸酶活性较高（P＜0.05），总胆固醇和天冬氨酸转氨酶水平较低。额外补充60 mg/kg锌的鸡的细胞免疫和体液免疫均有所改善。在整个实验期间，各实验组的母鸡日产蛋量相当（P＞0.05）。补充有机锌的组在蛋的内外品质——蛋白、蛋黄指数和蛋壳厚度方面均表现出显著差异。高剂量有机锌饲喂组的雌激素和孕酮浓度有显著差异，T2组的睾酮浓度最高。补充有机锌对精浆中锌和铜的浓度有显著影响。补充有机锌后，雄性和雌性种鸡的血清锌和铜浓度均显著升高。T2组的受精率和孵化率较高（P＜0.05）。可以得出结论，在基础日粮中额外补充40 mg/kg的有机锌（蛋氨酸锌）可提高肉种鸡的繁殖性能。
