14 May 2019
Survey of Suspended Solids in Irrigation Water of Ornamental Plant Nurseries and Effects of Filtration
Jinsheng Huang and Paul Fisher (University of Florida)
Filtration to remove suspended particles can be a significant investment for greenhouse and nursery business, especially when irrigating with recirculated or surface water sources. Filtration to remove particles from irrigation water is a key first step underlying other aspects of water treatment, to remove pathogen spores, material that can clog irrigation lines, and reduce demand for sanitizing chemicals. Objectives for this research included characterizing the particle size distribution and amount of suspended solids in irrigation water sources from a survey of plant nurseries, before and after filtration.
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Suspended Solids in Irrigation Water Summary (21 KB)
15 Apr 2019
Understanding Carbon Footprint in Production and Use of Landscape Plants
Ingram, D.L. (University of Kentucky), Hall, C.R. (Texas A&M University), and J. Knight (University of Kentucky)
Understanding carbon footprint (CF) and the underlying science is important to minimizing the negative impacts of new product development and assessing positive or negative cradle-to-grave life-cycle impacts. Life cycle assessment was used to characterize representative production models of field-grown and container-grown landscape plants. The dominant contributor to CF and variable costs of field-grown trees is equipment use, the majority of which is at harvest. Plastics, energy use for irrigation, and fertilization are the major contributor to CF of container-grown plants. Greenhouse heating can also be impactful on the CF of plants depending on the location of the greenhouse and the length and season(s) of production. Knowing the input products and activities that contribute most toward CF and costs allows nursery and greenhouse managers to consider protocol modifications that are most impactful on profit potential and environmental impact.
2 Apr 2019
Removal of Agrichemicals from Water Using Granular Activated Carbon Filtration
Grant, G.A., P.R. Fisher, J.E. Barrett, and P.C. Wilson (University of Florida)
The objective was to evaluate removal efficacy of agrichemicals from water using a small-scale granular activated carbon (GAC) system. Chemicals reduced below their minimum detection limits after 64 seconds of GAC filtration included acephate, flurprimidol, paclobutrazol, uniconazole, peracetic acid, DDAC, and chlorine. Percent reduction for other chemicals with 64 s GAC was 72.2% for bifenthrin, 89% chlorphyrifos, 85.3% imidacloprid, 99% glyphosate, 99.4% triclopyr, 99.3% hydrogen peroxide, 47.6% iron-EDDHA, and 94.6% soracid blue dye. GAC filtration can remove many agrichemical contaminants used in greenhouse and nursery production, although greater contact time would be needed in commercial production than in this study.