Abstract
Feeding trials and chemical analysis are the two most common methods used to estimate forage quality. Feeding trials are labor intensive and costly, therefore limited in use. Laboratory methods that predict forage value based on chemical composition and in vitro digestibility are also expensive and time-consuming. Infrared reflectance (IR) techniques have been developed that have potential for rapid, routine prediction of a wide variety of forage quality characteristics and animal responses to these forages. During the early 1960's, the Agricultural Research Service developed near-infrared spectroscopy to determine moisture, oil, and protein content of ground grain. In 1971, commercial instruments using these principles were available to the grain industry (Williams 1975). The objectives of this study were to assess the potential of the IR technique, using fecal or diet samples, to predict forage quality parameters and elk (Cervus elaphus) weight response.
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