Surveying phenological characteristic of Tamarix ramosissima around Abyaneh for introducing and creating diversity in urban green space

The First International Conferense of IALE-Iran

ABSTRACT:

  Urban green space is a fundamental and attractive element of cities around the world all through the year. Selecting species resistant to dryness is an essential decision for planting them in the urban green space in arid and semi-arid regions. One of the most important experiments to introduce new plants in new regions is phenology of different species. Quantitative investigation of phenology, through recording colours of different parts of plants can be a complement for descriptive method in determining exact appearance of the phenomena. In this study, the phenological characteristics of Tamarix ramosissima have been identifying using two different methods descriptive and analytical digital photography. For this purpose, ten species of Tamarix ramosissima were monitored during one year at monthly intervals in the distance of 15 kilometer away Abyaneh Village. The time of phonological phenomenon of each tree was registered in information forms, and different parts of the tree were photographed with a digital camera. The spectral spectrum of the leaf and fruit of the tree were produced and the colours were analyzed in RGB system, with radiometric resolution of 28 for each colour. The results of qualitative observation indicated that foliation and flowering were occurred in early Farvardin (end of March) and mid-Ordibehesht (early May), respectively. The diagrams’ results regarded to changing leaf color showed that red and green curves have met each other in Mehr (September and October) which illustrated evolution of leaves color. In this way, the diagram related on flowering represented that with the onset of flowering in early Ordibehesht, the three curves are close to each other and as the flowering continues, these three curves fall apart. In according to fruit diagram, red curve is the upper one among other curves during entire fruit lifetime.