Assessment of Sedum Plants Covering as Ground Cover Plants on Extensive Green Roof System

This study was carried out to assess the covering of 11 Sedum species on an extensive green roof system under the urban climate of South Korea for 2 years. The eleven Sedum species which came up to the criteria were selected: S. acre, S. album, S. kamtschaticum, S. oryzifolium, S. polystichoides, S. reflexum, S. rupestre, S. sarmentosum, S. sexangulare, S. spurium, and S. telephium. The plants were planted in the extensive green roof system with the substrate of porous glass+bark+field soil (v:v:v, 3:2:5) and then evaluated. The covering area of the Sedum species were about 72cm2 at the start after the establishment. When a year had passed since the systems were established, S. acre, S. oryzifolium and S. sexangulare maintained 200-500cm2/plant of covering area and the others maintained 800-1200cm2/plant. Most covering area increased continuously for about two years and showed a large quantity of increment in summer season with the exception of S. kamtschaticum, S. polystichoides, S. sarmentosum, and S. telephium, whose above-parts were not alive in winter. Keywords: Climate change, Global warming, Substrate, Urban desert, Urban heat island

Acre · Agroforestry · Agronomy · Archaeology · Biology · Botany · Canopy · Geography · Green roof · Growing season · Plant cover · Roof · Sedum · Diverse Approaches in Healthcare and Education Studies · Ecology and Conservation Studies · Environmental Science · Forestry · Horticulture