Ref ID: 10167
Ref Type: Journal
Authors: Williams, D. R., Potts, B. M., and Smethurst, P. J.
Pub Date: 2003
Journal Name: Canadian Journal of Forest Research
Volume: 33
Issue:
Start Page: 74
End Page: 81
ISBN/ISSN:
Keywords: affected/bud/combination/commercial/Dean/Deane/deficient/effect/efficacy/eucalypt/Eucalyptus/Eucalyptus nitens/experiment/fertilisation/fertiliser/fertilizer/flower/flowering/growth/immature/induction/Maiden/mechanism/nitrogen/nitrogen fertiliser/nitrogen fertiliser/paclobutrazol/phosphorus/seed/site/sites/soil/system/Tasmania/test/tree/trial/phosphorus fertiliser/trees/forest/research/volume
Abstract: We examined the effects of nitrogen and phosphorus fertiliser and paclobutrazol on flowering precocity and abundance in Eucalyptus nitens (Deane and Maiden). Trials to test these effects consisted of a factorial nitrogen by phosphorus experiment replicated on 2 sites and factorial nitrogen by paclobutrazol experiments conducted separately on reproductively immature and reproductively mature trees. The increase in tree size due to nitrogen fertilisation increased the occurrence and abundance of precocious flower buds. However, the increase in tree size alone could not account for the nitrogen effect on flowering, indicating a secondary mechanism of flower induction by nitrogen. The application of both nitrogen fertiliser and paclobutrazol substantially increased the occurrence of precociously flowering trees over that of either treatment applied alone. The efficacy of both paclobutrazol and nitrogen in stimulating the flowering of the reproductively mature trees was affected by soil type, but this effect was overcome through the combination of nitrogen and paclobutrazol. The combination of nitrogen and paclobutrazol also restricted tree growth and combined applications on nitrogen deficient sites will be beneficial in commercial systems for producing eucalypt seed.
The full-text link provided is a pre-publication version of an article submitted for publication in the Canadian Journal of Forest Research in the volume stated in this citation. The publisher of the Canadian Journal of Forest Research is NRC Research Press, http://pubs.nrc-cnrc.gc.ca
Notes: Entered by Dean Williams (19/2/2003)
Reprint: In File
Program: SPF Genetic Improvement
Project: A1; B1
Deliverable: A1-3.1; B1-1.4
Confidentiality: Public
Availability: Authors; CSIRO FFP Library Hobart;
Report: Annual Report 2002/3
Type: Article
Address: Dean.Williams@utas.edu.au
Misc 2: Published