학술논문
인공토양에 혼합된 지오휴머스가 토양 수분 증가와 식물의 건조스트레스에 미치는 영향 / Effects of Geohumus mixed with Artificial Soil on Soil Water Retention and Plant Stress Response
Document Type
Dissertation/ Thesis
Source
Subject
Language
Korean
Abstract
현대 사회는 도시화 및 산업화로 인해 도시 내의 녹지 공간 감소, 환경 오염 등 문제가 발생하였고 부정적인 영향을 미치고 있다. 도시 녹지 면적을 증가시키기 위한 방편으로 인공 지반의 녹화가 시도되고 있다. 본 연구는 인공 지반인 옥상 공간에서 생육이 가능한 식물인 돌단풍 (Mukdenia rossii), 수호초(Pachysandra terminalis), 패랭이 (Dianthus chinensis)를 대상으로, 토양개량제인 지오휴머스 (Geohumus)를 사용하여 토양수분 조건 차이에 의한 건조 스트레스 반응을 살피고, 이를 통해 향후 관수 관리를 위한 기초 자료로 활용하기 위한 것이 목적으로 연구를 하였다. 실험에서 토양수분 함량, 식물 스트레스 반응, 식물 생존율 3 가지를 측정하였다. 지오휴머스를 사용한 경우 인공 경량토양의 수분함유능력이 증가하였고 지오휴머스 사용량에 비례하여 차이를 보였다. 지오휴머스는 수분함유능력이 낮은 토양에서 더 큰 효과가 있는 것으로 나타났다. 지오휴머스를 사용한 경우 토양수분 함량에 따라 식물 스트레스 반응에도 차이를 보였다. 식물의 스트레스 반응은 패랭이가 가장 낮았고, 다음은 돌단풍, 수호초의 순으로 높아졌다. 수호초는 수분 스트레스를 가장 많이 받아 생존율이 다른 두 식물보다 낮았다. 무관수 옥상조건에서 건조에 따른 식물의 한계점은 6주 정도인 것으로 판단된다. 그리고 생존율은 지오휴머스의 양에 따라 차이를 보였다. 측정 결과를 통하여 지오휴머스를 사용하면 토양수분 함량, 식물 스트레스, 식물 생존에 도움을 주는 것으로 나타났다. 지오휴머스는 토양수분 조건을 개선하여 식물의 생장에 긍정적인 영향을 미치는 것으로 생각된다.
Currently, urban green space is disappearing due to urbanization, industrialization and various environmental problems, and the disruption of green ecological environments in urban situation. To solve such problems and increase urban green area, roof greening has been started. Through observing the growth of three plant species(Mukdenia rossii, Pachysandra terminalis, Dianthus chinensis) cultivated in soil mixed with Geohumus, this study investigated the change of soil water content and stress responses of the plants. The results of this study can be used for irrigation management on green roofs in the future. Soil water content of the artificial soils has been increased by mixing Geohumus with soil. The responses were proportional to the amount of Geohumus in the mixture. It seemed that Geohumus exerted a stronger influence on raising soil moisture content for the soils with lower water-holding capacity. The stress responses of the plants varied in relation to the amount of Geohumus and soil moisture content. The stress response was lowest for Dianthus chinensis and increased by the order of Mukdenia rossii and Pachysandra terminalis. With the highest plant stress, Pachysandra terminalis showed the lowest survival rate among the three species. Without irrigation, the three plants survived only for six weeks on green roofs. The survival rate differs depending on the amount of Geohumus used. The results of the experiment showed that Geohumus helped to improve soil water content, reduce plant stress, and extend plant survival period. The Geohumus is thought to have a positive effect on the growth of plants by improving soil moisture conditions.
Currently, urban green space is disappearing due to urbanization, industrialization and various environmental problems, and the disruption of green ecological environments in urban situation. To solve such problems and increase urban green area, roof greening has been started. Through observing the growth of three plant species(Mukdenia rossii, Pachysandra terminalis, Dianthus chinensis) cultivated in soil mixed with Geohumus, this study investigated the change of soil water content and stress responses of the plants. The results of this study can be used for irrigation management on green roofs in the future. Soil water content of the artificial soils has been increased by mixing Geohumus with soil. The responses were proportional to the amount of Geohumus in the mixture. It seemed that Geohumus exerted a stronger influence on raising soil moisture content for the soils with lower water-holding capacity. The stress responses of the plants varied in relation to the amount of Geohumus and soil moisture content. The stress response was lowest for Dianthus chinensis and increased by the order of Mukdenia rossii and Pachysandra terminalis. With the highest plant stress, Pachysandra terminalis showed the lowest survival rate among the three species. Without irrigation, the three plants survived only for six weeks on green roofs. The survival rate differs depending on the amount of Geohumus used. The results of the experiment showed that Geohumus helped to improve soil water content, reduce plant stress, and extend plant survival period. The Geohumus is thought to have a positive effect on the growth of plants by improving soil moisture conditions.