Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)


Animal Science

First Advisor

Richard C. Wahlstrom


Genetic selection by swine producers the past 10 to 15 years has resulted in faster growing, heavier muscled pig. In addition, confinement rearing has placed an increased emphasis upon skeletal development and bone formation. Recent research conducted at Ohio State University indicated that growing swine responded to increasing dietary protein levels if both calcium and phosphorus are also correspondingly increased but maintained at approximately a 1.3:1 ratio. This and other research has led some investigators to believe that the National Research Council's requirements for protein, calcium and phosphorus may not be adequate to support maximum growth and development. Much attention has been given to the nutritional requirements of growing and finishing swine in recent years. Previous research has shown that maximum bone formation and muscle development occur during the first 12 weeks of life in swine. The purpose of the research reported herein was to investigate the effect of dietary protein levels and varying levels of calcium and phosphorus on performance of young weaned pigs. Three trials were conducted to study different levels of these three nutrients in starter diets. Parameters analyzed were average daily gain, feed consumption, feed efficiency, bone ash, bone weight, serum calcium and serum phosphorus.

Library of Congress Subject Headings

Swine -- Feeding and feeds.
Proteins in animal nutrition.
Calcium in animal nutrition.
Phosphorus in animal nutrition.



Number of Pages



South Dakota State University