Full TGIF Record # 192077
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Author(s):Cai, Xiaoya; Trenholm, Laurie E.; Kruse, Jason; Sartain, Jerry B.
Author Affiliation:Cai: Horticulture Science Department, Texas A & M University, College Station, TX; Trenholm and Kruse: Environmental Horticulture Department; Sartain: Soil and Water Science Department, University of Florida, Gainesville, FL
Title:Response of 'Captiva' St. Augustinegrass to shade and potassium
Section:Turf management
Other records with the "Turf management" Section
Source:HortScience. Vol. 46, No. 10, October 2011, p. 1400-1403.
# of Pages:4
Publishing Information:Alexandria, VA: American Society for Horticultural Science
Keywords:TIC Keywords: Color evaluation; Cultivar evaluation; Dry weight; Leaf blade length; Leaf tissue; Leaf width; Nitrogen level; Potassium; Root growth rate; Shade resistance; Shade stress; Stenotaphrum secundatum; Visual evaluation
Cultivar Names:Captiva
Abstract/Contents:"The effects of potassium (K) on stress tolerance of turfgrass have been documented for some environmental stresses but not for shade tolerance. 'Captiva' st. augustinegrass [Stenotaphrum secundatum (Walt.) Kuntze] was evaluated in this research project to determine the effects of K and shade on turf performance. The study was conducted at the University of Florida Envirotron Turfgrass Research Laboratory in Gainesville, FL. Grasses were planted in 15.2-cm plastic pots in a climate-controlled glass house. Two consecutive studies were conducted, the first from 20 May to 24 Oct. 2009 and the second from 18 Jan. to 20 June 2010. Grasses were placed in either full sun or under shade structures covered with woven black shadecloth to provide 30%, 50%, or 70% shade. Potassium was applied as potassium chloride (KCl) (0-0-62) at four rates (0, 0.6, 1.2, or 2.4 g·m-2) every 30 days. In both trials, turf visual quality and color scores and dry weight (DW) of shoot and root were lowest at 70% shade and highest at 30% shade. Turf visual quality score increased as K rate increased. Leaf length increased and leaf width decreased as shade level increased. Leaf tissue total Kjedahl nitrogen (TKN) and K concentration increased as shade level increased from 0% to 70%. Thatch DW was greatest at 70% shade and lowest at 30% shade. In the first trial, turf treated with a higher K rate had longer leaf length and greater root DW. Results from this study showed that Captiva could maintain acceptable visual quality at up to 50% shade and that K at 2.4 g·m-2 may help turfgrass grow in a shaded environment by improving turf visual quality score, root growth, and leaf tissue K concentration. Additional field plot research should be conducted to verify these responses."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Cai, X., L. E. Trenholm, J. Kruse, and J. B. Sartain. 2011. Response of 'Captiva' St. Augustinegrass to shade and potassium. HortScience. 46(10):p. 1400-1403.
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DOI: 10.21273/HORTSCI.46.10.1400
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MSU catalog number: b2217685a
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