Skip to Main Content
Genetic and silvicultural research promoting common walnut (Juglans regia) for timber production in the United KingdomAuthor(s): Gabriel E. Hemery
Source: In: Michler, C.H.; Pijut, P.M.; Van Sambeek, J.W.; Coggeshall, M.V.; Seifert, J.; Woeste, K.; Overton, R.; Ponder, F., Jr., eds. Proceedings of the 6th Walnut Council Research Symposium; Gen. Tech. Rep. NC-243. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 138-145
Publication Series: General Technical Report (GTR)
Station: North Central Research Station
PDF: Download Publication (214.56 KB)
DescriptionA combination of genetic and silvicultural research is required to improve the viability of common walnut for timber production in the UK. A summary of a research programme, initiated in 1996, is provided. Establishment of walnut plantations using tree shelters indicated positive benefits using 0.75 m shelters but larger shelters (1.20 m) caused early flushing and increased dieback. Direct seeding trials indicated that pretreatment of seed with gibberellins was highly effective in reducing the need for lengthy pre-treatments and promoted 87% germination. Artificial application of nitrogen fertiliser on newly established walnut trees indicated that applications up to 500 kg ha-1 had no effect on survival or early growth. Assessments of a range-wide collection of walnut, including provenances from Kyrgyzstan, point to high variability in flushing and growth between provenances and progenies 4 years after establishment. Genotype by site interaction within the three provenance trials is evident. Adoption of new, to the UK, silvicultural systems incorporating tree and shrub nurses indicated promising benefits from using the nitrogen-fixing nurse species autumn olive and Italian alder.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationHemery, Gabriel E. 2004. Genetic and silvicultural research promoting common walnut (Juglans regia) for timber production in the United Kingdom. In: Michler, C.H.; Pijut, P.M.; Van Sambeek, J.W.; Coggeshall, M.V.; Seifert, J.; Woeste, K.; Overton, R.; Ponder, F., Jr., eds. Proceedings of the 6th Walnut Council Research Symposium; Gen. Tech. Rep. NC-243. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 138-145
- Interplanting woody nurse crops promotes differential growth of black walnut saplings
- Growth response of black walnut to interplanted trees
- A new tree improvement programme for black walnut in the United Kingdom
XML: View XML