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Field pennycress (Thlaspi arvense L.) has potential as an interseeded cover crop

Published online by Cambridge University Press:  11 June 2019

Sam E. Wortman Open the ORCID record for Sam E. Wortman [Opens in a new window]
Sam E. Wortman*
Affiliation:
Department of Agronomy and Horticulture, University of Nebraska – Lincoln, 279 Plant Sciences Hall, Lincoln, NE68583, USA
*
Author for correspondence: Sam E. Wortman, E-mail: swortman@unl.edu
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Abstract

Interseeding provides flexibility in cover crop establishment, but most cover crop species are not well-adapted to the duration of low-intensity light beneath the cash crop canopy. Field pennycress (Thlaspi arvense L.) has physiological seed dormancy traits and its emergence pattern may be better synchronized with cash crop senescence. The objective of this study was to demonstrate proof-of-concept for using pennycress as an interseeded cover crop. A 2-year field experiment was conducted where cereal rye (Secale cereale L.), mustard (Guillenia flavescens L.) or pennycress were interseeded into edamame [Glycine max (L.) Merr.] 1 month after planting. Rye and mustard emerged within 6 days, whereas pennycress emergence was delayed up to 56 days after interseeding. Pennycress provided 37–57% soil cover in fall and produced 0.4–2.5 Mg ha−1 biomass the following spring. Preliminary results demonstrate the utility of pennycress as an interseeded cover crop and the potential value of seed dormancy traits in interseeding systems.

Keywords

Catch cropssoil conservationsustainable agriculture
Type
From the Field
Information
Renewable Agriculture and Food Systems , Volume 35 , Issue 5 , October 2020 , pp. 594 - 598
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Copyright
Copyright © Cambridge University Press 2019

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