Title page for ETD etd-1118103-115616

Type of Document Master's Thesis
Author Komma, Chandrasekhar R
Author's Email Address ckomma1@lsu.edu
URN etd-1118103-115616
Title Identification of Morphological Characteristics in St. Augustinegrass and Zoyisagrass Cultivars during Establishment and Growing under Shade and Sun
Degree Master of Science (M.S.)
Department Horticulture
Advisory Committee
Advisor Name Title
James Mc Crimmon Committee Co-Chair
Paul Wilson Committee Co-Chair
Edward W. Bush Committee Member
Jeff S. Kuehny Committee Member
  • sun and shade study
  • nutrient analysis
  • turfgrass
  • st. augustinegrass
  • zoysiagrass
  • visual quality
  • growth parameters
Date of Defense 2003-10-14
Availability unrestricted
Shade is one of the most important factors affecting turfgrass growth for home lawns. It affects both shoot and root growth and the overall quality of the turf stand. A study was initiated to investigate the effects of shade on growth and quality of St. Augustinegrass (“Bitterblue”, “Delmar”, “Floratam”, “Palmetto”, “Raleigh”, “Seville”, and“TR-610”) and two cultivars of zoysiagrass (“Empire” and “Empress”) were planted in both the shade and sun to study the effects on growth and quality. Quality measurements were taken for color, texture, density, uniformity, and overall quality on a monthly basis. Growth parameters were taken for internode length , stolon width, leaf width, and leaf length during initial, middle, and final stages of the study period.

“TR-610” was the best cultivar under shade for its outstanding quality in color, density, uniformity, and overall quality. “Delmar”, “Palmetto”, and “Raleigh” performed relatively better in shade compared to other cultivars. “Empire” and “Empress” zoysiagrasses had good quality until the middle of the study period but quality decreased toward the end of the study. The quality of “Empire” was relatively better compared to “Empress” at the end of the study period. “Bitterblue” and “Floratam” did not perform well in the shade.

“TR-610” showed shade tolerance by performing similarly in both shade and sun for all the growth parameters. “Bitterblue” had poor shade tolerance compared to the other cultivars. It had longer internodes, thicker stolons, and wider leaf blades in shade during the study period. “Floratam” was relatively better compared to “Bitterblue”. Reduced internode length, optimum stolon and leaf width, and increased leaf lengths were identified as the shade tolerant characters.

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