Full TGIF Record # 179312
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Author(s):Erickson, John E.; Kenworthy, Kevin E.
Author Affiliation:Agronomy Department, University of Florida, Gainesville, FL
Title:Nitrogen and light affect water use and water use efficiency of zoysiagrass genotypes differing in canopy structure
Section:Turf management
Other records with the "Turf management" Section
Source:HortScience. Vol. 46, No. 4, April 2011, p. 643-647.
# of Pages:5
Publishing Information:Alexandria, VA: American Society for Horticultural Science
Keywords:TIC Keywords: Evapotranspiration rate; Growth studies; Irrigation efficiency; Irrigation practices; Lawn turf; Nitrogen fertilization; Potable water; Quality evaluation; Shade resistance; Water conservation; Zoysia japonica
Cultivar Names:Empire
Abstract/Contents:"Irrigation of residential lawns represents one of the major uses of potable water in many regions. An increased understanding of physiological responses underlying effects of turfgrass genotypes and management practices on water use rates and water use efficiencies could contribute to water conservation. Thus, we evaluated the effects of nitrogen (N) fertilization (0.0 and 2.5 g·m-2) and light environment (full sun and 50% shade) on average daily evapotranspiration (ETAVE), daily ET per unit leaf area (ETLA), carbon exchange rate (CER), and water use efficiency (WUE) in upright (experimental TAES 5343-22) and prostrate ('Empire') zoysiagrasses (Zoysia japonica Steud.) during two repeated trials. Across all treatments, ETAVE was 4.0 and 5.4 mm·d-1 during Trials 1 and 2, respectively. In the upright-growing genotype, ETAVE was ≅10% greater than the prostrate genotype during Trial 1. Nitrogen fertilization increased water use by ≅20% compared with non-fertilized pots. However, N fertilization reduced ETLA and increased WUE. Thus, ETAVE was positively related with WUE. As a result, there was a tradeoff between ETAVE and WUE, indicating that efforts to achieve reductions in water use through low N fertilization or genotypes can be accomplished, but in some cases at the expense of using water less efficiently to assimilate carbon for plant growth processes. In turfgrass, reductions in growth and WUE might be acceptable to minimize water use, but vigor and quality need to be maintained."
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Erickson, J. E., and K. E. Kenworthy. 2011. Nitrogen and light affect water use and water use efficiency of zoysiagrass genotypes differing in canopy structure. HortScience. 46(4):p. 643-647.
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DOI: 10.21273/HORTSCI.46.4.643
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MSU catalog number: b2217685a
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