5 Feb 2019
Consumer Perceptions, Attitudes, and Purchase Behavior with Landscape Plants During Real and Perceived Drought Periods
Knuth, M. (Texas A&M University), Behe, B.K. (Michigan State University), Hall, C.R. (Texas A&M University), Fernandez, R.T. and P.T. Huddleston (Michigan State University)
A survey of 1543 subjects was conducted to explore consumer attitudes and behavior during real and perceived drought situations, especially in terms of their landscape purchases and gardening/landscaping activities. Findings could better inform educational programs and marketing strategies on the future demand of plant products and services. Read on, to learn how subjects perceived if the region in which they lived was experiencing drought.
22 Jan 2019
Removal of Nitrogen and Phosphorus from Nursery Runoff using Zeolite and Woodchips
Anna Birnbaum and Jim Owen (Virginia Tech)
Nitrogen (N) and Phosphorus (P) runoff from containerized nurseries contributes impaired US waterways. Virginia Tech aimed to evaluate the effectiveness of ferric aided zeolite sieves with or without bioreactors as a potential BMP for N and P removal of containerized nursery production tail-water (i.e. runoff). The ferric aided zeolite sieve without woodchip bioreactor achieved an average P removal efficiency of 30% with no effect on N removal. Woodchip bioreactors preceding zeolite was effective for N removal with an average rate of 14%. Woodchip bioreactors reduced efficacy at N removal was presumed to be a result of retention times >24hrs and high sulfur concentrations. Ferric aided zeolite+woodchip bioreactor treatment trains may be effective for N and P reduction in nursery tail-water if designed properly to avoid excessive retention times in the denitrification bioreactors.
Watch the presentation here https://youtu.be/7V_H_6orlJc
RemovalNitrogenPhosphorusfromNurseryRunoffusingZeoliteandWoodchips (4957 KB)
8 Jan 2019
Global Warming Potential, Variable Costs, and Water Use of a Model Greenhouse Production System for 11.4-cm Annual Plants Using Life Cycle Assessment
Ingram, D.L. (University of Kentucky), Hall, C.R. (Texas A&M), and J. Knight (University of Kentucky)
Life cycle assessment (LCA) was used to analyze production system components for a 11.4-cm container of wax begonia in a 12-plant shuttle tray modeled in a gutter-connected, Dutch-style greenhouse with natural ventilation in the northeastern U.S. The global warming potential (GWP) of input products, equipment use and environmental controls for an individual plant would be 0.140 kg CO2e and the variable costs would total $0.666. Fifty-seven percent of the GWP and 43% of the variable costs would be due to the container and the portion of a 12-plant shuttle tray assigned to a plant. Electricity for irrigation and general overhead would be only 13% of GWP and 2% of variable costs. Natural gas use for heating would be 0.01% of GWP and 0.001% of variable costs, even at a northeastern U.S. location. This was due to the rapid crop turnover, and only heated for 3 months of a 50-wk production year
HortScience 2018 (464 KB)