College-wide Navigational Links | Go to Local Content
Main Content |

Commodities: Field Crops: Forages

Common Terms Used in Animal Feeding and Nutrition

Glossary: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

H

Heat Damage: Also See Acid Detergent Insoluble Crude Protein. Heat damage is the result of exposing the feedstuff to excessive heat during processing or storage that irreversibly binds protein to the fiber (carbohydrates) portion of the feed through a chemical reaction called “Maillard Reaction” or “Browning Reaction”, making proteins partially or wholly unavailable for digestion.

Hemicellulose: Like cellulose, hemi-cellulose is a carbohydrate that exists in almost all plant cell walls along with cellulose. Whereas cellulose is composed of only glucose, hemicellulose is composed of many different other sugars (e.g., glucose, xylose, mannose, galactose, arabinose etc.) in chains of 500-3000 sugar units. Hemicellulose is a branched polymer. In contrast, cellulose is not branched. As hemi-cellulose content increases in animal feed, the voluntary feed intake typically decreases.