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Subject: Animal Nutrition × Author: RAMACHANDRAIAH, M. × End date: 2019 × Start date: 2015 × Thesis Type: M.V.Sc. ×
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    ThesisItemOpen Access
    EFFECT OF ZINC SUPPLEMENTATION ON GROWTH PERFORMANCE OF LAMBS
    (KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2017-10) RAMACHANDRAIAH, M.; Dr. K. CHANDRAPAL SINGH
    A study was undertaken to evaluate the effect of dietary supplemental Zn on feed intake, digestibility of nutrients, growth performance and blood biochemical parameters in growing Mandya lambs. Eighteen lambs, aged 3-4 months with average body weight of 9.71 kg were divided into three groups of six each based on body weight. The experimental groups viz. T1, T2 and T3 received a basal diet comprising finger millet straw (Elucine coracana) and compounded feed mixture, fed in calculated quantities to a targeted body weight gain of 100 g per day. The Zn content in the diet of group T1 was 29.4 (control), while the groups T2 and T3 received additional supplementation of Zn (as ZnSO4) at 100 and 200 ppm respectively. The duration of the growth trial was 12 weeks. Dietary supplementation of Zn increased (P<0.05) the average daily weight gain of lambs (82.6, 103 and 102 g per day for T1, T2 and T3 groups respectively). Zinc supplementation also increased (P<0.05) the feed intake and apparent digestibility of DM, OM, NDF and ADF. The concentration of alkaline phosphatase and total serum proteins in groups T2 and T3 was higher (P<0.05) than the control groups. Feeding 200 ppm of Zn had no advantage compared to 100 ppm supplementation, in any of the parameters studied. It was concluded from the study that, as against the recommended levels of 30 ppm of Zn the diet of growing lambs, supplementation of 100 ppm could be more beneficial for achieving a higher growth performance in lambs.