CLIMAT URBAIN ET IMPACT SUR LE DEBOURREMENT DES BOURGEONS DE LA VEGETATION URBAINE DANS LA VILLE DE SETIF

Abstract

The budburst phase is one of the most temperature-sensitive parameters. The study of the morpho-physiological parameters of urban vegetation will allow a better characterization of the behavior of the tree in the city. This study concerns five woody species in the city of Setif (northeast of Algeria): Rosa sp, Euonyms japonicus, Populus tremula, Morus alba and Ligustrum vulgare. The observations were based on phenological behavior such as bud burst, leaf expansion and senescence during the period of january to april 2022 at six sites. The results obtained showed that the phenophase of the beginning of the buds took place between the beginning of february and the beginning of march for all the sites. Statistical analysis showed that the rosebush and the Japanese spindle are the first species whose appearance of buds was observed. The phenological monitoring of the expansion of the leaves shows that the rosebush and the mulberry occupy the first group followed by the other species. These results illustrate the manifestations of climate change, in particular the rise in temperatures in january and february in the city of Setif.