Growth of individual mistol (Ziziphus mistol Griseb.) trees: an important species of the Argentinian Chaco
DOI:
https://doi.org/10.29298/rmcf.v6i31.196Keywords:
Argentina, Chaco, annual increase (AI), mean annual increase (MAI), quebracho, Ziziphus mistol GrisebAbstract
Ziziphus mistol is, together with white quebracho, the most prevalent tree species in the Argentinian Chaco. The objective of this research was to model the growth of individual mistol trees and to analyze their possibilities in relation to logging. The study was carried out with samples from Villa La Punta, Guasayán and Santos Lugares, Alberdi, Santiago del Estero, Argentina. 26 randomly selected trees were logged. Cross-cutting sections of the stem cut at the height of the BHD (1.30 m) were used. The count and measurement of the rings was performed with the ANIOL computer system and the CATRAS software. The ring width or Radial Increase (RI) was measured. RI, BHD, NS and stem volume (SV) were modeled according to tree age. The mean annual increase (MAI) and the annual increase (AI) were estimated for the variables BHD, NS and SV. Mistol has thin, moderately demarcated growth rings (0.273 cm), with statistically significant differences between sites. The AI and MAI in NS and SV do not intercept in the studied age interval (78 years). Because of its poor health status and of its narrow heartwood, harvesting is recommended after the tree has attained a BHD of 25 cm.
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