Effect of organic and nano forms of copper at reduced dietary levels on excretion and tissue deposition of selected minerals in Giriraja Chicken Aminullah Noor, Prabhu T.M.*, Naik Jaya, Suresh B.N., Chikkaramappa T.1, Umashankar B.C. Department of Animal Nutrition, Veterinary College Bengaluru, KVAFSU, Bidar, Karnataka-560024, India 1Department of Soil Science and Agricultural Chemistry, UAS, Bengaluru-560065, India *Corresponding author: prabhutmann@gmail.com
Online Published on 28 November, 2022. Abstract Aminullah, N., Prabhu, T.M., Naik, J., Suresh, B.N., Chikkaramappa, T. and Umashankar, B.C. 2022. Effect of organic and nano forms of copper at reduced dietary levels on excretion and tissue deposition of selected minerals in giriraja chicken. Animal Nutrition and Feed Technology, 22: 489–501. This study was aimed to evaluate the effect of reduced dietary copper (Cu) levels using organic and nanoparticle forms on excretion and tissue deposition of selected minerals in improved native chickens. Day-old Giriraja chicks (n=420) were assigned to 7 groups, each consisting 4 replicates of 15 chicks. The chick (1–6 weeks) and grower phase (7–10 weeks) basal diets were correspondingly supplemented with 20 and 30 ppm Cu from inorganic source as control. Basal diets were supplemented with organic Cu at 100 (0C-100), 75 (OC-75) and 50% (0C-50) of control or with nanoparticle Cu at 75 (NC-75), 50 (NC-50) and 25% (NC-25) of control and served as the test diets. A conventional metabolism trial and sampling of tissues were conducted at termination of the experiment. Intake, excretion and retention of Ca and P were similar among the groups. Cu intake was proportional to its inclusion level in the diet. Cu excretion (% intake or mg/bird/d) was reduced (P<0.05) and retention was improved (P<0.05) in all the test groups compared to control. Fe excretion was higher (P=0.048) in 0C-50 compared to NC-50. Zn and Mn excretion and retention were similar among all the groups. Bone Ca was higher (P=0.010) in NC-50 compared to 0C-100. Cu deposition in liver and muscle was higher (P=0.001) in 0C-100 and NC-75, while the lowest was noticed in control and NC-25. Fe concentration in liver was higher (P=0.020) in 0C-100 than in control, while Zn content was higher (P=0.05) in 0C-50 and NC-50 than in 0C-100. Mn content in liver and Fe, Zn and Mn content in muscle were unaffected. The study revealed that the Cu excretion could be reduced with better Cu deposition in tissues using organic or nano particle source in the diet of Giriraja birds without affecting Fe, Zn, Mn, Ca and P balance in chicken. Top Keywords Copper, Excretion, Giriraja chicks, Nanoparticles, Organic form, Tissue minerals. Top |