Evaluation of Gebze-Orhangazi-İzmir Highway’s Landscape Plants

Özkan E., Zencirkıran M.

Bursa Uludağ Üniversitesi, Ziraat Fakültesi Dergisi, Journal of Agricultural Faculty of Bursa Uludag University, vol.36, no.1, pp.87-102, 2022 (Peer-Reviewed Journal)


In this study, Gebze-Orhangazi-İzmir Highway, which is the longest completed highway in Turkey with a length of 426 km, landscape plants have been examined in terms of ecological, aesthetic and suitability criteria. Gebze-Orhangazi-İzmir Highway consists of 7 sections, namely Gebze-Orhangazi, Orhangazi-Bursa, Bursa-Susurluk, Susurluk-Balıkesir, Balıkesir-Kırkağaç, Kırkağaç-Manisa, and Manisa-İzmir. It has been determined that 107 landscape plant taxa are used in the whole study area. It has been determined that GebzeOrhangazi section has the highest taxa diversity and Bursa-Susurluk section has the least taxa diversity. It is seen that a total of 6,144,974 plants are used in the whole highway. Of landscape plants which are used as taxa, 59.81% are exotic (foreign), 40.19% are natural (domestic). It has been found that 74.77% of them are resistant to frost, 63.55% of them are resistant to drought, and 37.38% of them are resistant to salinity. It is observed that 92.52% of the taxa are suitable for the highway landscape.