Effects of High Levels of Dietary Silicon on Bone Development of Growing Rats and Turkeys Fed Semi-purified Diets

Two experiments were conducted using a completely randomized design to study the effects of high levels of silicon (Si) supplementation on bone development, structure, and strength in growing rats and turkeys. Rats were supplemented at two dietary Si levels: 0 and 500 ppm; and the turkeys were supplemented at four dietary Si levels: 0, 135, 270, and 540 ppm in semi-purified diets of dextrose-albumin for rats and dextrose-casein for turkeys. The experiments lasted 8 and 4 weeks for the rats and turkeys, respectively. Physical, mechanical, and chemical parameters of bones were measured. All the physical and mechanical measures of bone size and strength were not different ( P > 0.05) between treatments in rats and turkeys except the moment of inertia, which was lower ( P 0.05) by Si supplementation, plasma magnesium ( P = 0.08) in rats and plasma calcium ( P