This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/70040
Description
Title
Utilization of Soy Protein by the Young Pig
Author(s)
Giesting, Donald Walter
Issue Date
1987
Department of Study
Animal Sciences
Discipline
Animal Sciences
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Agriculture, Animal Culture and Nutrition
Abstract
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.
Evaluation of nutrient digestibility at the ileum showed young pigs digest diets based on casein more effectively than diets containing soy protein sources. Addition of fumaric acid does not improve nutrient digestibility. Fumaric acid addition does not affect gastric emptying rate, digesta pH or pepsin production but reduces organic acid production in gastric cannulated pigs. Supplementation of corn-soybean diets with inorganic acids (HCl, H(,3)PO(,4), and H(,2)SO(,4)) is generally ineffective in promoting improved postweaning performance of starter pigs. Similarly, direct treatment of finely ground soybean meal with H(,3)PO(,4) and (or) NaOH was without effect. It was apparent that addition of some inorganic acids has a deleterious effect on the metabolism of young pigs. Exposure to soy protein for a brief period (days 8 to 10 of life) or daily from day 8 to weaning on day 21 does not affect postweaning performance, antibody titers against soy protein or the cell mediated immune response of pigs to phytohemagglutinin or a soy protein extract. Apparently, the absorption of antibodies from sow colostrum modulates the immune response to dietary proteins in the young pig.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
