This study was aimed to determine effects of soil organic amendment as plant growing media component on restoration of planting ground. The changes of soil physical and chemical properties and germination and growth of kentucky bluegrass (Poa pratensis L.) were investigated. For treatments, soil was excavated at depth of 0-50 cm (referred as S1) and at depth of 50-100 cm (referred as S2). Then the half amount of S1 soil was mixed with the soil organic amendment (coir dust 40% (v/v), bottom ash 25%, leaf mold 25%, vermiculite 5%, carbonized rice hull 5%) at a rate of 6% (v/v) (referred as S1CC) and also the half amount of S2 soil was mixed with the soil organic amendment at a rate of 6% (v/v) (referred as S2CC) on pot in a 16 cm diameter and 14 cm height. The experiment was replicated 3 times with 3 pots per replication in randomized block design, and 100 seeds were planted per pot. In results, there was no significant difference in soil pH among the treatments with a slight decrease in soil hydraulic conductivity. However, in the S1CC treatment, positive increases in soil chemical properties, including electrical conductivity, organic matter, phosphoric acid, total nitrogen, exchangeable cation, and cation exchange capacity. Also, the germination rate, plant height, and number of leaves were higher in the S1CC treatment than those in other treatments. These results suggest that the addition of organic amendment to the soil at depth of 0-50 cm might be proper for restoring planting ground.

본 연구는 옥상녹화에서 무기질계 인공토와 유기질계 인공토가 초본인 돌나물과 목본인 순비기나무의 생육에 미치는 영향을 살펴 봄으로써 유기질계 인공토의 효용성을 제시하고자 한다. 연구기간 은 2013년 5월에서 10월로 약 5개월이며, 식물종은 초본류에 돌나 물을, 목본류에 순비기나무를 대상으로 무기질계 인공토(Inorganic substrate=perlite, IOS), 자연토(natural soil, NS), 유기질계 인공 토Ⅰ(organic substrate=artificial compost Ⅰ, OS1), 유기질계 인공토 Ⅱ(organic substrate=artificial compost Ⅱ, OS2)로 구 성하였다. 돌나물의 초장, 줄기수, 엽수, 상대엽록소함량비는 유기 질계 인공토 Ⅰ처리구(OS1)> 자연토 처리구(NS)> 무기질계 인 공토(IOS) 순으로 높았으며, 통계적인 차이가 뚜렷하였다. 생체중 과 건물중 또한 OS1, NS, IOS 처리구 순으로 생육결과와 비교적 유사한 경향을 보였다. 순비기나무는 수고, 경경, 엽장, 엽폭은 유기 질계 인공토 Ⅱ(OS2)> 자연토 처리구(NS)> 무기질계 인공토 (IOS) 순으로 유의적으로 높았으며, 특히 유기질계 인공토 Ⅱ 처리 구에서 단기간의 실험임에도 불구하고 그 차이가 뚜렷했다. 이에 옥상녹화의 식재지반에서 무기질계 인공토의 단용처리는 식물생 육에 부정적인 영향을 미칠 수 있으므로 식물생육을 위한 적정비율 의 유기질계 인공토의 활용이 요구된다.