{"title":"Effect of dietary micronutrient supplementation on growth and reproductive parameters in bull calves","authors":"Parul Kuraichya , Prasanth M. Nair , Rashika Srivastava , Vaibhav Dhaigude , Parul Chaudhary , Mukesh Bhakat , Veena Mani , Goutam Mondal","doi":"10.1016/j.jtherbio.2025.104225","DOIUrl":null,"url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"132 ","pages":"Article 104225"},"PeriodicalIF":2.9000,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of thermal biology","FirstCategoryId":"99","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0306456525001822","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"BIOLOGY","Score":null,"Total":0}
引用次数: 0
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.
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