For some species like Fagus orientalis or Quercus spp, is it very easy to spot the borders of sapwood and do the measurements. But for some species, the sapwood area is not visually recognizable. Do you have any suggestion for measuring the sapwood area of Carpinus betulus using the standard instruments? I should mention that we don't have high tech instruments like x-ray or tomography.
Hello,
Have you read this paper of: Gebauer T, Horna V, Leuschner C (2008) Variability in radial sap flux density patterns and sapwood area among seven co-occurring temperate broad-leaved tree species. Tree Physiol 28:1821–1830
I also suggest this paper for you: http://download.springer.com/static/pdf/683/art%253A10.1007%252Fs13595-012-0189-0.pdf?auth66=1420818152_1172588cc69ac1611fd81f07a43e446c&ext=.pdf and http://emguldner.free.fr/ExpeER/7%20Hesse%201.19%20Longdoz%202008%20%2810%29.pdf
And here are some additional articles:
http://www.biogeosciences.net/4/137/2007/bg-4-137-2007.pdf
http://treephys.oxfordjournals.org/content/28/12/1821.full.pdf
http://treephys.oxfordjournals.org/content/33/8/817.full.pdf
http://www.idosi.org/mejsr/mejsr8%283%2911/22.pdf
http://journals.tubitak.gov.tr/agriculture/issues/tar-11-35-2/tar-35-2-7-0912-515.pdf
http://www.idosi.org/mejsr/mejsr8%283%2911/22.pdf
http://emguldner.free.fr/ExpeER/7%20Hesse%201.19%20Longdoz%202008%20%2810%29.pdf
Hi Hormoz,
Have you tried using a colour dye on stem cores? Methyl orange works well on many species. The difference in pH between sapwood and heartwood causing the dye to turn slightly different colours.
Michael
Michael A Forster , I like your method but won't a deep core as the one you did hurt the plant? I would like to test it on a commercial orchard but I am afraid the grower won't be happy if I drill his trees :).
It will cause a minor wound on the tree. You can plug the wound with a pruning sealer to prevent infection.
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