Effects of Geohumus Mixed with Artificial Soil on Soil Water Retention and Plant Stress Response

인공토양에 혼합된 지오휴머스가 토양수분 증가와 식물의 건조 스트레스에 미치는 영향

Li, Yan;Kim, Dong Yeob;Kim, Hyoung Bo;Kim, Young Ki

  • Received : 2015.07.29
  • Accepted : 2016.02.17
  • Published : 2016.02.29


Currently, urban green space is disappearing due to urbanization, industrialization and various environmental problems including the disruption of the ecology in urban areas. To solve such problems and increase urban green area, roof greening has been suggested as an alternative. Through observing the responses of three plant species (Mukdenia rossii, Dianthus chinensis, and Pachysandra terminalis) plantrd on the soil mixed with Geohumus, this study investigated the effect of Gehumus on soil water content and plant survival. Soil water content of the rooftop soils has been increased when mixed with Geohumus. The responses were proportional to the amount of Geohumus in the mixture. Geohumus exerted a stronger influence on raising soil moisture content for soil A which had 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 in 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 plants survived only for six weeks on green roofs. The survival rate differed depending on the amount of Geohumus mixed. The results of the experiment showed, with some exceptions, that Geohumus helped to improve soil water content, reduce plant stress, and extend plant survival period.


Plant growth media;Geohumus;Soil Water Retention;Drought stress;Survival Rate


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