본 연구는 나라꽃으로서 상징성이 높은 무궁화를 실내공간에 도입하기 위하여 실내광원별 경관적 특성을 살펴서 효율적인 도입방안을 모색하기 위해 수행되었다. 공시식물로서 무궁화 품종 중 내음성이 비교적 강하다고 알려진 무궁화 “백단심” 을 선정하였으며 형광등, LED등, 삼파장등, 광섬유 4종류의 광원과 500, 750, 1500, 2,500lux의 광도에서 7개월간 실험하였다. 식물의 경관적 측정요소로 엽장, 엽폭, 초장, 엽수, 낙엽수, 절간장, 엽록소함량 등을 조사하였다. 식물의 생리적 요소로서 광합성률(Pn), CO2흡수율(CO2), 세포내 CO2농도(Ci), 대기중 CO2농도(Ca), 기공전도도(Cs), 증산량(Tr) 등을 측정하였다. 또한 기공수를 관찰하여 광합성이 잘 이루어지고 있는지 확인하였으며 광원별 개화율과 색차계를 이용한 화색을 조사하였다. 실험결과 및 도입방안은 다음과 같다. 첫째, 식물의 경관적 구성요소 중 엽수가 모든 광원에서 통계적 유의성을 보였다. 엽수는 엽장, 엽폭과 함께 수관 형성 및 수형에도 영향을 미치는데 광도가 높을수록 많이 출엽하였으며, 광섬유 1,500lux 하에서 가장 많이 출엽하였다. 엽장 엽폭은 광도가 높을수록 크기가 커지는 경향을 보였다. 둘째, 무궁화는 잎도 특이하지만 꽃이 아름답고 상징성이 있어서 선호되는데 무궁화 “백단심” 은 8월~10월에 개화한다. 꽃을 감상할 목적으로 광원별 광조건을 살펴보면, 형광등 750lux~2,500lux, LED등 1,500lux~2,500lux, 삼파장등 750lux~2,500lux, 광섬유1,500lux~2,500lux로 파악되었다. 가장 효과적인 광원 및 광도는 광섬유 1,500lux~2,500lux인 것으로 나타났다. 셋째, 잎의 신선도는 광합성량 및 잎의 기공의 특성으로도 가늠해 볼 수 있는데 광도가 높을수록 광합성률은 높아졌다. 광원별 기공의 수는 7~28개로 나타났으며 LED등 1,500lux와 광섬유 1,500lux에서 가장 많은 기공수를 보였다. 넷째, 색차계 분석결과 꽃색은 분홍빛 보다는 옅은 Green에 가까우며, Blue에 가까운 색상을 나타내었다. L*(명도)의 값은 90 이상의 수치를 나타내어 명도가 매우 높은 것으로 조사되었다. 최종적으로 생육상태 및 생장량, 개화율을 고려할 때 무궁화 백단심의 최적광원은 광섬유 1,500lux인 것으로 판단된다. 그러나 향후 더 많은 무궁화 품종을 대상으로 적정광원과 적정광도를 파악하고 무궁화 연령별 개화율에 대한 실험을 추가적으로 하여 나라꽃 무궁화의 활용가치 및 활용 영역을 향상할 필요성이 있다.

The purpose of this study is to investigate the current status of the creation of indoor gardens in elementary, middle, and high-schools in Gyeongsangnam-do (province) as part of a program to make schools comfortable and beautiful, and for use as base line data when introducing indoor gardens to schools. The participating schools comprised all 536 elementary, 306 middle, and 191 high schools in Gyeongsangnam-do, and the study was conducted between Dec. 20th, 2014 and July 23rd, 2015. The results demonstrate that indoor gardens were introduced to Gyeongsangnam-do schools in 2010, and, since then, 35 elementary and 3 middle schools have created indoor gardens, which is a low adoption rate. Eight-four percent of these indoor gardens were created for appreciation purposes only, without rest facilities. Indoor plants were the main material used for scene configurations, followed by rocks and sculptures. Taking into consideration that 92% of all indoor gardens were created in elementary schools, the current location of gardens near the main entrance, mainly for appreciation purposes, should be changed to areas in which students can play and rest, which would lead to an increase in students’ usage rate.

This study examined the preparations carried out to establish indoor garden areas in Seoul metropolitan subway stations and in 5 other metropolitan cities subway stations in order to present findings on how these preparations might be improved. The preparation ratio for indoor garden areas among Seoul metropolitan subway stations was 6.9%, 38 places, and the ratio overall for 5 metropolitan cities was 21.6%, 54 places. Among the 5 metropolitan cities, the ratio was 26.7% in Busan metropolitan city, 20.0% in Gwangju metropolitan city, 11.6% in Daegu metropolitan city, 18.2% in Daejeon metropolitan city, and 10.3% in Incheon metropolitan city. With regard to the results comparing the decoration ratio with natural flowers and artificial flowers among the prepared stations with indoor gardens, in the case of Seoul metropolitan area, places decorated with natural flowers numbered 23, and the ratio was 60.5%, but, in case of the 5 metropolitan cities, places decorated with natural flowers numbered just 6, and the ratio was just 11.1%. In the case of garden ornaments as material introduced in Seoul metropolitan area subway stations decorated with natural flowers and the 5 metropolitan cities subway stations, one to three kinds of ornament were introduced per each place, and the ornament items included rocks, garden lanterns, ponds, stone mortars, stone lamps, fountains, sculptures, mini water mills, and windmills. The introduced trees at subway stations in Korea that were decorated with natural flowers included 93 species of 70 genera of 45 families. The introduced trees included 87 species of 67 genera of 42 families in Seoul metropolitan area subway stations, and the introduced trees included 28 species of 16 genera of 11 families in the 5 metropolitan cities subway stations. Native trees included 21 species of 20 genera of 17 families. As for scenery formation elements according to the height of trees, in the case of Seoul metropolitan area, the introduced trees included 22 species of upper trees, 15 species of middle trees, and 46 species of lower trees. In the case of the 5 metropolitan cities, the introduced trees included 1 species of upper trees, 5 species of middle trees, and 18 species of lower trees. Therefore, volume and visual diversity in Seoul metropolitan area was provided by the height and bulk of trees, but the volume of scenery and diversity in the 5 metropolitan cities was insufficient. In the case of Seoul metropolitan area, using indoor garden spaces is necessary to connect with mini libraries, resting spaces, and snack bars, and various using types are necessary. In the case of the 5 metropolitan cities, only the visual image was provided, and therefore an activation plan for using spaces is necessary.