Sphagnum Peat in the Growing Medium and Nitrogen Application Influence Asparagus Growth

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  • 1 Department of Horticultural Science and Landscape Architecture, University of Minnesota, St. Paul, MN 55108

High levels of sphagnum peat in the growing medium promoted growth of asparagus (Asparagus officinalis L. cv. Viking 2K) in a greenhouse study. Application of NH4NO3 > 1 g/pot (84 kg·ha-1 equivalent) was detrimental to root growth. High N rates and high organic matter levels decreased fibrous root development. Shoot dry weight was highly correlated with fleshy root number, root dry weight, and shoot vigor.

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