HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Figures Only Full Text Free Full Text (PDF) Free Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (2) Citing Articles via Google Scholar Google Scholar Articles by McCullough, P. E. Articles by Toler, J. E. Search for Related Content PubMed Articles by McCullough, P. E. Articles by Toler, J. E. Agricola Articles by McCullough, P. E. Articles by Toler, J. E. Related Collections Turfgrass

TURFGRASS SCIENCE

Bermudagrass Putting Green Growth, Color, and Nutrient Partitioning Influenced by Nitrogen and Trinexapac-Ethyl

^a Dep. of Plant Biology and Pathology, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901-8520
^b Dep. of Horticulture, D-136 Poole Ag. Center, Clemson, SC 29634-0319
^c Dep. of Applied Economics and Statistics, Clemson University, Clemson, SC 29634-0319

^* Corresponding author (haibol{at}clemson.edu)

Plant growth regulators (PGRs) improve turf color by inhibiting leaf growth and may reduce fertilization requirements of bermudagrass [Cynodon dactylon (L.) Pers. x C. transvaalensis Burtt-Davy] golf greens by reducing nutrients removed through clipping collection. To test this hypothesis, growth, color, and nutrient allocation of ‘TifEagle’ bermudagrass maintained at 3.2 mm were investigated in field experiments conducted in Clemson, SC, from April to August in 2003 and 2004. Ammonium nitrate was applied at 6, 12, 18, or 24 kg N ha^–1 wk^–1 with a PGR, trinexapac-ethyl {[4-(cyclopropyl-[]-hydroxymethylene)-3,5-dioxo-cyclohexane carboxylic acid ethyl ester]} (TE), at 0 or 0.05 kg a.i. ha^–1 3 wk^–1. Turf required 18 to 24 kg N ha^–1 wk^–1 from May to June and 12 kg N ha^–1 wk^–1 from July to August to maintain acceptable color (7, 1–9 scale). Trinexapac-ethyl initially caused discoloration but bermudagrass recovered and had color enhanced 10 to 25% from nontreated. Trinexapac-ethyl reduced clippings 67% from nontreated while clippings, percentage of lateral regrowth, and aerification recovery increased with N rate. Bermudagrass treated with TE had similar root mass to nontreated but 5% greater stolon and rhizome mass, 18% higher chlorophyll concentration, up to 67% reduced lateral regrowth, and up to 38% reduced aerification recovery. Trinexapac-ethyl reduced leaf N, P, K, Mg, S, and Fe concentrations 10 to 25% and increased rhizome concentrations 8 to 36%. Nutrients recovered through clippings were reduced 70% from TE applications while TE-treated turf had increased N, P, K, Ca, Mg, S, Mn, and Fe retention in stolons and rhizomes. Overall, TE enhanced color while reducing nutrient translocation from rhizomes to leaves, thus increasing bermudagrass nutrient retention.

Abbreviations: PGR, plant growth regulator • TE, trinexapac-ethyl • USGA, United States Golf Association • WAA, week after aerification • WAINT, week after initial N treatment

This article has been cited by other articles:

				P. E. McCullough, H. Liu, L. B. McCarty, and J. E. Toler Trinexapac-Ethyl Application Regimens Influence Growth, Quality, and Performance of Bermuda Grass and Creeping Bentgrass Putting Greens Crop Sci., September 1, 2007; 47(5): 2138 - 2144. [Abstract] [Full Text] [PDF]