The influence of climatic factors on the onset of flowering and leafing in poplar clones in Delta del Paraná, Argentina

  • A. Garau Universidad de Buenos Aires
  • S. Filippini de Delfino Universidad de Buenos Aires
  • G. Berrondo INTA
Keywords: Bioclimate, Poplar, Populus deltoides, Flowering, Leafing

Abstract

We studied the effect of different climatic factors on the burst of flower and leaf buds of several poplar clones through a multivariate analysis technique. Six Populus deltoides clones of wide cultivation in Argentina were studied and phenological observations were done for six years. Meteorological information were photoperiod, chilling hours (as numer of hours with temperature equal or minor than 7 °C), precipitations and temperature considered as degree-day model. Four threshold temperatures and two start dates were considered. Statistical analysis was performed using univariated and multivariate analysis. Temperature summation, with a threshold temperature of 4 °C, beginning on July 1st was the main factor for the begining of the phenophases. Photoperiod, precipitations and chilling hours were less important. The relative importance of the several climatic factors analyzed is discussed related to the geographic origen of Populus deltoides.

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Published
2001-06-01
How to Cite
Garau, A., Filippini de Delfino, S., & Berrondo, G. (2001). The influence of climatic factors on the onset of flowering and leafing in poplar clones in Delta del Paraná, Argentina. Forest Systems, 9(1), 169-176. https://doi.org/10.5424/661
Section
Research Articles

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