Robert (Bob) O. Myer, Cheryl L. Mackowiak, Ann R. Blount, Ronald D. Barnett
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Soluble Carbohydrate Concentrations in Annual Cool-Season Forages Grown in the Southeastern USA
Forages high in soluble carbohydrates are desirable nutritionally for ruminant animals. A 2-year study was conducted to evaluate the influence of species, cultivar within species, and harvest date on water soluble carbohydrate and ethanol soluble carbohydrate concentrations in annual cool-season forages grown in the southeastern USA (north Florida, 31°N). Three common or recommended cultivars each of oat and three of annual ryegrass were grown in small field plots with repeated clippings during the 2006-2007 and 2007-2008 winter-spring seasons. Concentrations of non-structural carbohydrates such as soluble sugars, as measured by water soluble and ethanol soluble carbohydrates, varied by species and cultivar within species, but the greatest variation was due to clipping date during the winter-spring season. Concentrations decreased linearly for ryegrass and curvilinearly for oat as the winter-spring season progressed.
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