The influence of climatic factors on the onset of flowering and leafing in poplar clones in Delta del Paraná, Argentina
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.Downloads
© CSIC. Manuscripts published in both the printed and online versions of this Journal are the property of Consejo Superior de Investigaciones Científicas, and quoting this source is a requirement for any partial or full reproduction.
All contents of this electronic edition, except where otherwise noted, are distributed under a “Creative Commons Attribution 4.0 International” (CC BY 4.0) License. You may read here the basic information and the legal text of the license. The indication of the CC BY 4.0 License must be expressly stated in this way when necessary.
Self-archiving in repositories, personal webpages or similar, of any version other than the published by the Editor, is not allowed.