In high value species, the proportion of heartwood is a very important variable to determine the price of wood. Knowing the physiology of heartwood formation , could be posible to device silvicultural treatments and genetic improvement strategies to increase the proportion of ths quality wood,
The paper by Kojima et al (2009) is of interest since it discusses different silvicultural strategies for trees planted near or south of the equator considering the minimization of juvenile wood production.
https://www.researchgate.net/publication/237151748_Determining_factor_of_xylem_maturation_in_Eucalyptus_grandis_planted_in_different_latitudes_and_climatic_divisions_of_South_America_A_view_based_on_fiber_length
Hello Ronnie,
I work with walnut plantations for timber production. This point is very important for us.
Im doing my Phd in the iuFOR and is focused in the heartwood formation of hybrid walnut,
One of the last publication I find very interesting is from Dr. Roger Moya, probably you already know it:Article Heartwood formation and prediction of heartwood parameters i...
My approach where focused:
-Genetic: we have three trials in different location in Spain with five years with different clones and one of the aspect to be selected was the heartwood formation observed in cores. Conference Paper Characterization of walnut hybrid plus trees for good qualit...
Until now I don´t observe the start of heartwood.
-Selvicultural: We made two trials in three clonal plantations with 15 year with different treatment of thinnings. The trials are in the second year. Until now I haven´t data to differences in heartwood formation.
-On the other hand, the industrial: The market value heartwood of walnut for aestetical aspect so we try to induce the aspect by different treatment of drying. One of the publication we saw is: Article Colour variation and use of steamed walnutwood (juglans regi...
Now we can change the color of our wood without any chemical traetment.
I had empirically modeled the heartwood volume, VH, of trees by using DBH and VH determined from trees of different sizes and using stem analysis to determine VH. The relationship is of course different between the species of trees and it seems age also describes an important part of the VH variability. Try the empirical method and the conclusions you would most likely come up with are: (i) open the forest a bit to let desirable trees grow in DBH, (ii) for large old trees the gain in AVH/AT is quite small so do not wait anymore to harvest, and (iii) for some species, for young trees improve site conditions to reduce the SW/HW (SW= softwood; HD=heartwood) ratio. Althoug for other tree species, the viceversa may be true.
Hope these comments would improve your understanding on heartwood formation.
Kind Regards
Sincerely
Jose Navar, Ph.D
Dear José Navar, thank you very much for ypur refkexios. They will be useful d fefine better hw to stady the physyiology , buy¡t asi ti define silvicultural interventions. Best regards.
Also thanks Antonio Ca¡rlos, and Ignacio. You are giving me good oreintatiins. I will h¡keep you all informed.
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The proportion of heartwood is a very important variable to determine the price of wood in Beech trees. I see in large trees have red heartwood in Beech trees.These trees have problem in price...
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