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Effect of Fertilizer Source on Nitrate Leaching and Turfgrass Quality. (C05-saha682689-oral)

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Effect of Fertilizer Source on Nitrate Leaching and Turfgrass Quality. (C05-saha682689-oral)

Authors:

S.K. Saha* - University of Florida L.E. Trenholm - University of Florida J.B. Unruh - University of Florida J.B. Sartain - University of Florida R. Schoellhorn - University of Florida T.K. Broschat - University of Florida

Abstract:

Due to concern over potential pollution of Florida's water resources from fertilization of home lawns, research is being conducted to verify landscape best management practices. The objectives of this study were to evaluate differences in plant quality, growth, and nutrient leaching between turf and landscape plants in response to different fertilizers. This study was conducted in a climate-controlled greenhouse at the Univ. of FL, Gainesville. ‘Floratam’ St. Augustinegrass (Stenotaphrum secundatum) was compared to a mix of common Florida ornamentals including Canna generalis, Nandina domestica, Ligustrum japonicum and Allamanda spp. Plants were grown in 300 l plastic pots in an Arredondo fine sand.

Three fertilizer treatments (16-4-8 quick-release, 15-0-15 quick-release, and 8-4-12 slow-release) were applied at 4.9 g N m-2 every 60 d. Experimental design was a randomized complete block design with four replications. Leachate was collected at 15, 30, and 60 d following fertilizer application and analyzed for nitrate and phosphate content. Best turfgrass responses occurred with the quick release fertilizers during the first two weeks after fertilizer application. Greatest thatch accumulation was

observed in the turf fertilized with 15-0-15 and the least was found in the 8-4-12. Throughout the study, water consumption was higher in ornamentals than in turf.

Speaker Information: Subhrajit Saha, University of Florida, 1001 SW 16th. Avenue # 83, Gainesville, FL 32601; Phone: 352-392-1831 ext. 239; E-mail: [email protected]

Session Information: Monday, November 3, 2003, 7:55 AM-11:15 AM Presentation Start: 10:00 AM

Keywords: St.Augustinegrass; Landscape plants; Nitrate Leaching; Turf Quality

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