Steam flaking characteristics and nutritional value of different corn hybrids

Date

1997-05

Journal Title

Journal ISSN

Volume Title

Publisher

Texas Tech University

Abstract

Approximately twenty percent of the cattle being fed in the United States are found in the Panhandle of Texas. Presently, the preferred method for processing com for feedlot cattle is steam-flaking. Steam-flaking is a method which involves moderately high temperatures, the uptake of moisture, and the physical dismption of the kemel by mechanical forces. Steam-flaking improves the feeding value of com by 5 to 6% when compared to dry rolling alone. This increase in feeding value is partly due to the cleavage of disulfide bonds in the starch-protein matrix. The intent of this research was to determine nutrient differences and steam-flaking characteristics of twelve commercial com hybrids. Steam-flaking characteristics include electrical energy consumption, flake durability, and percent fines. Nutrient content of the flaked grains in combination with starch availability and free sulfhydryl groups were determined to identify nutrient differences. Commercial com hybrids were steamed for exactly 30 minutes and then flaked utilizing a laboratory steam-flaker. Differences (P<.05) were found for electrical energy and time required to process each hybrid. Hybrid 2 required the least (P<.05) KWH when compared to hybrid 8 which required the most. Hybrid 3 required the least amount of time to process. However, this was only less (P<.05) than hybrids 7, 8, and 9. Hybrid 7 had the highest (P<.05) flake durability index rating of 92.5% when compared to hybrid 6 which had the lowest rating of 85.9 %.

Description

Keywords

Hybrid corn, Cattle, Corn as feed

Citation