Relations Between Climatic Factors and Diameter Increment of Zanthoxylum rhoifolia Lam. and Zanthoxylum hyemale St. Hil. at the Region of Santa Maria, RS
Keywords:
Dendroecology, Growth and climate, Water balanceAbstract
The relationship between meteorological variables and the diameter increment of Zanthoxylum rhoifolia (mamica-de-cadela) and Zanthoxylum hyemale (coentrilho) was studied. It was taken data of two trees for each species in Santa Maria - Rio Grande do Sul, Brazil. The observation period included years from 1974 to 1996 for mamica-de-cadela and from 1977 to 1996 for coentrilho. The stem analysis was used to restore the tree´s diameter increment. Discs were taken at 1,30m, 2,70m and 3,80m high of each tree.The 4 radii on perpendicular cross sections were measured on each disc. To identify the short-term variation in radial increment, the synchronization and standardization of disc´s sequence were performed for each tree. Temperature and precipitation data from Santa Maria Meteorological Station were used to calculate the evapotranspiration and the potential water balance. The correlation analysis between tree´s annual increment and potential water balance showed significant statistical results for both species.
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