Author : Rachel Elizabeth Howdyshell
Publisher :
ISBN 13 :
Total Pages : 190 pages
Book Rating : 4.:/5 (423 download)
Book Synopsis Evaluating the Efficacy of Dietary Trace Mineral Levels on Physiological Responses and Tissue Mineral Composition in Weanling and Grower Pigs by : Rachel Elizabeth Howdyshell
Download or read book Evaluating the Efficacy of Dietary Trace Mineral Levels on Physiological Responses and Tissue Mineral Composition in Weanling and Grower Pigs written by Rachel Elizabeth Howdyshell and published by . This book was released on 2008 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The effects of dietary trace mineral concentration and source on weanling and grower pig growth performance, liver enzyme activity, blood/plasma constituents, and tissue mineral content were evaluated in two experiments. The first experiment used 160 crossbred pigs over a 35 d nursery period. This experiment was conducted in randomized complete block design in eight replicates. At weaning (17 ± 2 d), pigs were allotted to 1 of 5 dietary treatments (n=4/pen): (1) basal diet + 0% NRC trace mineral, (2) as 1 + 50% NRC organic trace mineral, (3) as 1 + 100% NRC organic trace mineral, (4) as 1 + 150% NRC organic trace mineral, and (5) as 1 + 100% NRC inorganic trace mineral. The non-fortified basal diet served as the negative control while the diet supplemented with inorganic trace minerals served as the positive control. Pigs were bled at d 0, 10, and 35 with hemoglobin (Hb), hematocrit (Hct), ceruloplasmin (Cp), and glutathione peroxidase (GSH-Px) activity determined. Tissues (liver, loin, heart, kidney, pancreas, and brain) were collected on d 35 for mineral analysis. Portions of the liver were frozen in liquid N for enzyme (catalase, Cu/Zn SOD, Mn SOD, and GSH-Px) activity determination. Pigs fed the non- fortified basal diet displayed reduced growth and exhibited symptoms typical of parakeratosis. Average daily gain (ADG), average daily feed intake (ADFI), feed efficiency (G:F), and liver enzyme activity were not affected by organic trace mineral level. On d 35, Hb, Hct, Cp, and GSH-Px increased (P