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Factors Affecting Carbohydrate Reserves of Cool Season Turfgrasses¹

Changes in levels of soluble carbohydrate reserves were determined for four turfgrass species under two levels of nitrogen and two levels of potassium fertilization under standard golf course management practices. Soil temperatures and the level of nitrogen fertilization were the most important factors in producing seasonal fluctuations in soluble carbohydrate levels. The main soluble carbohydrate reserves were localized in the stem tissue. The percent total soluble carbohydrates were found to be proportionally higher than the percent total fructose for all species and at all sampling periods.

Key Words: Nitrogen fertilization • Soil temperature

² Graduate Assistant, University of Massachusetts (now Graduate Assistant, Department of Plant Pathology, University of Rhode Island); Associate Professor, Professor, and Professor, Department of Plant and Soil Sciences, University of Massachusetts, respectively.

Received for publication August 7, 1968.

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