Student Research Reports
Fenološko motrenje žućenja listova divlje i kultivirane smokve
Organization(s):Ekonomska i trgovačka škola Dubrovnik
Country:Croatia
Student(s):Matea Kolić, Katarina Bojanović, Antonela Lučić
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Educator(s):Sanja Ćulić
Contributors:
Report Type(s):Standard Research Report
Protocols:Green-Up / Green-Down
Language(s):Croatian
Date Submitted:01/12/2025
This project investigates the phenological process of yellowing and leaf fall of two fig trees, a cultivated fig at the Montovjerna location near the Dubrovnik School of Economics and Trade and a wild fig at the Ombla location in the period from 4 September 2023 to 23 December 2023. Both figs have a similar age, face the southeast and are exposed to a similar and considerable amount of solar radiation. Observing a wild fig near the river that grew into an unusual tree, on an inaccessible rocky terrain, without any human care and comparing it with the fig growing near the house with human care, the question arose whether the phenological cycle of fig green-down would be different. We assumed that the wild fig, due to its growth in conditions that are not influenced by humans, has acquired greater resistance to external factors and will have a longer yellowing phenological cycle than the cultivated fig. The crown of the wild fig was denser, and the leaves thicker, greener and smaller than the leaves of the cultivated fig whose crown was thinned and pruned. We compared the change in the color of the leavesand analyzed the data obtained by measuring the air temperature, cloud cover percentage and the presence of wind, as well as those obtained by measuring the soil temperature, pH-value and composition. We determined the differences and concluded that along the river, there were always lower air and soil temperatures, different soil composition and soil pH-value, higher soil moisture, greater protection from north and south winds and a higher canopy density, which probably resulted in a longer photosynthetic activity of wild fig.