Utilization of Soy Protein by the Young Pig

A series of experiments were conducted to evaluate the limitations of a corn-soy protein diet for providing nutrients to young pigs weaned at three to four weeks of age. Soy protein sources were shown to limit feed efficiency when compared to a milk protein, i.e., casein. Cornstarch reduces feed intake and gain in comparison to lactose in the diet. Removal of the soluble carbohydrate fraction of the soybean was not effective for improving performance beyond that supported by soybean meal. Extrusion cooking of corn and (or) soybeans was found to improve performance of starter pigs over feeding diets based on raw corn, soybean meal and soy oil. Addition of fumaric acid (2 or 3%) improves feed efficiency of pigs fed either a simple, corn-soybean meal diet or a diet supplemented with 25% dried skim milk. Pigs fed corn-based diets supplemented with soy protein concentrate respond more favorably to fumaric acid addition than contemporaries fed a corn-casein diet. Addition of sodium bicarbonate (2.5%) improves performance of pigs fed acidified diets but does not favorably affect the performance of pigs fed diets without fumaric acid.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Animal Sciences

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Giesting, Donald Walter

• Agriculture, Animal Culture and Nutrition

Identifier

(UMI)AAI8711800

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/70040