Managing Global Resources for a Secure Future

2017 Annual Meeting | Oct. 22-25 | Tampa, FL

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106547 Influence of Preemergent Herbicides on Nitrogen and Phosphorus Uptake and Leaching from Tifway 419 Bermudagrass.

Poster Number 921

See more from this Division: C05 Turfgrass Science
See more from this Session: Turf Fertility, Nutrition and Water Quality Poster (includes student competition)

Tuesday, October 24, 2017
Tampa Convention Center, East Exhibit Hall

Lucas Oliveira Ribeiro Maia, University of Florida, Davie, FL, Travis W. Shaddox, Fort Lauderdale Research and Education Center, University of Florida, Ft. Lauderdale, FL, Ramon G Leon, Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC., NC and Jason Kruse, University of Florida, Gainesville, FL
Poster Presentation
  • Influence of Preemergent Herbicides on Nitrogen and Phosphorus Uptake and Leaching from Tifway 419 Bermudagrass - Lucas Maia - ASA 2017.pdf (1.6 MB)
    • Abstract:

    Influence of Preemergent Herbicides on Nitrogen and Phosphorus Uptake and Leaching from Tifway 419 Bermudagrass

    L. O. Maia, T. W. Shaddox, R. G. Leon, and J. K. Kruse

    Abstract

    Nutrients applied according to the best management practices (BMPs) for Florida golf courses have very little opportunity to contribute to nonpoint source pollution when applied to healthy turfgrass. Some pre-emergent herbicides are documented to inhibit root growth, which may increase nutrient leaching even on healthy turfgrass.  The objective of this research is to determine  the effects of pre-emergent herbicides on nitrogen (N) and phosphorous leaching and nutrient uptake of tifway 419 hybrid bermudagrass [Cynodon dactylon (L.) Pers. × C. transvaalensis Burtt-Davy]. Treatments were arranged in a randomized complete block design with four replications and included a no-turf control, a no-herbicide control, oxidiazon (224 kg ha-1), prodiamine (1.17 L ha-1), and indaziflam (0.33 L ha-1). Bermudagrass sprigs were planted on February 23rd on a mixture of 90% sand and 10% peat and data collection began June 1, 2017. Nutrients were be applied to all plots every two months using a 15-5-15. Leachate was collected as needed and analyzed for NO3-N, NH4-N, and orthophosphate. Tissue nutrients, thermal images, and NDVI were measured every two weeks. Roots were collected 4 and 8 weeks after treatment and analyzed for root length, diameter, dry weight, and visual assessment for abnormal growth.  This study has a potential impact of validating that current BMPs are appropriate even under the conditions of root inhibition by pre-emergent herbicides. Should pre-emergent herbicides result in N and P leaching, best management practice would be amended accordingly.

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    L. O. Maia, M.S. student, Fort Lauderdale Res. and Educ. Center, Univ. of Florida, Fort Lauderdale, FL 33314-7799.

    T. W. Shaddox, Assistant Professor, Fort Lauderdale Res. and Educ. Center, Univ. of Florida, Fort Lauderdale, FL 33314-7799.

    See more from this Division: C05 Turfgrass Science
    See more from this Session: Turf Fertility, Nutrition and Water Quality Poster (includes student competition)

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