Dr. Barry Shelp
University of Guelph
This research work will further test the hypothesis that nutrient use efficiency of modern cultivars of greenhouse-grown potted chrysanthemums can be improved by reducing nutrient supply during vegetative growth, in combination with an interrupted supply during reproductive growth, without sacrificing plant yield & quality. The current project objective is to optimize the delivery of the remaining macronutrients (calcium and magnesium), as well as the micronutrients, to sub-irrigated and drip-irrigated potted chrysanthemums.
Research in years one to four will study the delivery of specific macronutrient combinations during vegetative growth of sub-irrigated potted chrysanthemums over two growing seasons. The year five objective will be to determine whether the optimized nutrient delivery system established for sub-irrigated potted chrysanthemums in the research greenhouse is applicable to both sub-irrigated and drip-irrigated chrysanthemums.