Effect of dietary micronutrient supplementation on growth and reproductive parameters in bull calves

IF 2.9 2区 生物学 Q2 BIOLOGY
Parul Kuraichya , Prasanth M. Nair , Rashika Srivastava , Vaibhav Dhaigude , Parul Chaudhary , Mukesh Bhakat , Veena Mani , Goutam Mondal
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Abstract

Optimal nutrition during early growth is crucial for enhancing calves' development and future productivity. This study evaluated the impact of supra-nutritional supplementation of specific micronutrients on growth, antioxidant status, immunity, and reproductive parameters in Sahiwal bull calves. Eighteen male calves (6 months old) were randomly assigned to three groups (n = 6): T1 (basal diet), T2 (25 % higher Zn, Mn, Vit. A & E than in the basal diet), and T3 (50 % higher than in the basal diet). The trial lasted for 180 days. No significant differences (P > 0.05) were observed among groups for body weight, morphometric measurements, average daily gain (0.54–0.57 kg/day), dry matter intake, nutrient digestibility, or nitrogen balance. Hematological and most biochemical parameters (Haemoglobin: 9.6–10.2 g/dL, Red Blood Cells, White Blood Cells, glucose, total protein, albumin, globulin) remained unaffected. However, alkaline phosphatase activity increased significantly in T2 (88.3 IU/L) and T3 (93.6 IU/L) compared to T1 (74.5 IU/L) (P < 0.01). Supplementation improved (P < 0.01) antioxidant status: superoxide dismutase activity increased by 18–22 %, and ferric Reducing Antioxidant Power by 15–19 % in T2 and T3. Total immunoglobulin levels were higher (P < 0.05) in the supplemented groups (T2: 2.87 mg/mL; T3: 2.95 mg/mL) compared to the control (T1: 2.61 mg/mL). Plasma mineral levels of zinc and manganese and vitamin A and E concentrations increased significantly (P < 0.05) in T2 and T3. Notably, testosterone levels rose significantly after four months (T1: 1.42 ng/mL; T2: 1.62 ng/mL; T3: 1.67 ng/mL; P < 0.05), indicating potential for earlier puberty onset. Scrotal circumference and testicular temperature gradient measured by infrared thermography were similar (P > 0.05) among the groups. In conclusion, dietary supplementation with Zn, Mn, vitamin A, and E at 25 % above basal levels enhances antioxidant status, immune response, and testosterone production in bull calves without affecting growth performance, supporting earlier reproductive maturity.

Abstract Image

饲粮微量营养素添加对公牛犊牛生长和繁殖参数的影响
生长早期的最佳营养对提高犊牛的发育和未来的生产力至关重要。本研究评估了特定微量营养素的超营养补充对Sahiwal公牛犊牛生长、抗氧化状态、免疫和生殖参数的影响。选取18头6月龄雄性犊牛,随机分为3组(n = 6): T1组(基础饲粮),T2组(高25% Zn、Mn、Vit)。A &; E比基础日粮高)和T3(比基础日粮高50%)。试验期180 d。各组间体重、形态测量、平均日增重(0.54 ~ 0.57 kg/d)、干物质采食量、营养物质消化率和氮平衡均无显著差异(P > 0.05)。血液学和大多数生化参数(血红蛋白:9.6-10.2 g/dL,红细胞,白细胞,葡萄糖,总蛋白,白蛋白,球蛋白)未受影响。T2 (88.3 IU/L)和T3 (93.6 IU/L)碱性磷酸酶活性显著高于T1 (74.5 IU/L)。在T2和T3阶段,添加铁提高了抗氧化能力(P < 0.01):超氧化物歧化酶活性提高了18 - 22%,铁还原抗氧化能力提高了15 - 19%。T2组(2.87 mg/mL)和T3组(2.95 mg/mL)的总免疫球蛋白水平均高于对照组(2.61 mg/mL) (P < 0.05)。血浆锌、锰矿物质水平和维生素A、E浓度在T2和T3显著升高(P < 0.05)。值得注意的是,四个月后,睾酮水平显著上升(T1: 1.42 ng/mL; T2: 1.62 ng/mL; T3: 1.67 ng/mL; P < 0.05),表明青春期可能提前发生。红外热像仪测得的阴囊周长和睾丸温度梯度各组间差异无统计学意义(P > 0.05)。综上所述,饲粮中添加高于基础水平25%的锌、锰、维生素A和E可提高公牛犊牛的抗氧化能力、免疫反应和睾酮分泌,且不影响其生长性能,有利于提前生殖成熟。
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来源期刊
Journal of thermal biology
Journal of thermal biology 生物-动物学
CiteScore
5.30
自引率
7.40%
发文量
196
审稿时长
14.5 weeks
期刊介绍: The Journal of Thermal Biology publishes articles that advance our knowledge on the ways and mechanisms through which temperature affects man and animals. This includes studies of their responses to these effects and on the ecological consequences. Directly relevant to this theme are: • The mechanisms of thermal limitation, heat and cold injury, and the resistance of organisms to extremes of temperature • The mechanisms involved in acclimation, acclimatization and evolutionary adaptation to temperature • Mechanisms underlying the patterns of hibernation, torpor, dormancy, aestivation and diapause • Effects of temperature on reproduction and development, growth, ageing and life-span • Studies on modelling heat transfer between organisms and their environment • The contributions of temperature to effects of climate change on animal species and man • Studies of conservation biology and physiology related to temperature • Behavioural and physiological regulation of body temperature including its pathophysiology and fever • Medical applications of hypo- and hyperthermia Article types: • Original articles • Review articles
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