Timing of collection and preparation of hardwood stem cuttings for propagating hybrid hazelnuts

Research output: Contribution to journalArticlepeer-review

Abstract

In previous trials we had found that dormant hybrid hazelnuts crown suckers collected in the fall after leaf drop can be successfully rooted if they are chilled at least until January before being placed in low-cost humidity tents in a greenhouse. The first objective of this experiment was to determine if cuttings could be rooted if started earlier, so as to avoid the heat stress found in the greenhouse in late spring and early summer. The second objective was to see if rooting rates could be improved by collecting non-dormant crown suckers in September and October, before leaf drop. We hypothesized that by collecting stems at a time in the fall when woody plants are translocating resources from leaves to their root systems, we could direct those resources towards growth of adventitious roots. This hypothesis proved to be wrong: stems collected in full leaf died, even with measures to avoid moisture loss from leaves. However, we found that stems collected soon after leaf abscission, in early November, could be rooted if placed in the humidity tents in late November, after only three weeks of artificial chilling at 2 C (36 F). That is much less chilling than we previously thought was needed.

Original languageEnglish (US)
Pages (from-to)81-84
Number of pages4
JournalJournal of Environmental Horticulture
Volume37
Issue number3
DOIs
StatePublished - Sep 2019

Bibliographical note

Funding Information:
1Received for publication January 20, 2019; in revised form May 19, 2019. This research was part of USDA-NIFA Specialty Crop Research Initiative grant Award no 2011-51181-30681. It was also made possible by the University of Minnesota’s Undergraduate Research Opportunities Program (UROP) which enabled an undergraduate, Kaixin Chen, to have a meaningful role in this research. Thanks also to Kevin Betts for keeping the greenhouse going. 2Research Associate, PhD, Department of Agronomy and Plant Genetics, University of Minnesota. brau0259@umn.edu, corresponding author. 3Professor, Department of Agronomy and Plant Genetics, University of Minnesota.

Funding Information:
This research was part of USDA-NIFA Specialty Crop Research Initiative grant Award no 2011-51181-30681. It was also made possible by the University of Minnesota?s Undergraduate Research Opportunities Program (UROP) which enabled an undergraduate, Kaixin Chen, to have a meaningful role in this research. Thanks also to Kevin Betts for keeping the greenhouse going.

Publisher Copyright:
© 2019 Horticultural Research Institute.

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

Keywords

  • Chilling requirement
  • Corylus americana (Walter)
  • Corylus avellana (L.)
  • Propagation
  • Rooting

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