A Comparison of Methods for Age Determination of the Oldest Croatian Olive Tree (CROSBI ID 592696)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Radunić, Mira ; Klepo, Tatjana ; Drvodelić, Damir ; Oršanić, Milan ; Mikac, Stjepan
engleski
A Comparison of Methods for Age Determination of the Oldest Croatian Olive Tree
Olive (Olea europaea L.) is one of the 17 tree species that can reach more than a 1000 years of age. The oldest Croatian olive tree, ‘Perišićeva mastrinka’ that grows in Kaštela area, is a monument to a long olive growing tradition. Unknown origin and morphological characterization results (high yield, fruit size, oil content, ect.) indicate that this tree is probably a spontaneous seedling of some unknown cultivar. The exact age of this tree is unknown, although morphological assessment (trunk and crown diameter) puts it between 1500 and 2000 years. The diameter increment is an autogenous feature of olive trees, controlled by various external factors, particularly climate. The main object of this study was to compare two methods (based on counting the number of annual tree rings) of tree age determination on seven sections made of branches removed after pruning of the monumental olive tree. The traditional method used for measuring the core increment is a destructive method and, in this case, not applicable. This method was compared to the nondestructive resistograph (IML RESI F500) method with 0, 1 mm resolution and catheter (diameter of 1 mm). The TSAPWin 4.67, ARSTAN and COFECHA softwares were used in this analysis. Preliminary results have shown that the two methods are very similar (more than 90%). The tree ring width ranged from 0, 08 to 2, 94 mm, with the average value of 0, 70 mm. Autocorrelations in tree ring series ranged from 0, 6 to 0, 7, and mean sensitivity is very low with the average of 0, 37. These results indicate the possible use of this nondestructive method in age determination of very old olive trees. However, the central part of the tree is poorly conserved, and a more precise age determination would need to include at least 10 olive trees grown in similar climate condition.
Olea europaea; monumental olive; annual tree rings; resistograph
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Podaci o prilogu
P-2-P-2.
2012.
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objavljeno
Podaci o matičnoj publikaciji
Book of Abstract VIIth International Symposium on Olive Growing
San Juan:
Podaci o skupu
VIIth International Symposium on Olive Growing
poster
25.09.2012-29.09.2012
San Juan, Argentina