Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Effect of Organic Fertilizer Application depends on Soil Depths on the Growth of Spiraea bumalda 'Gold Mound' in a Extensive Green Roof System

조방형 옥상녹화에서 노랑조팝나무의 활착에 미치는 토심별 유기질 토양개량제의 시용 효과

  • Ju, Jin-Hee (Department of Green Technology Convergence, Konkuk University) ;
  • Gu, Eun-Pyung (Department of Green Technology Convergence, Konkuk University) ;
  • Yoon, Yong-Han (Department of Green Technology Convergence, Konkuk University)
  • 주진희 (건국대학교 녹색기술융합학과) ;
  • 구은평 (건국대학교 녹색기술융합학과) ;
  • 윤용한 (건국대학교 녹색기술융합학과)
  • Received : 2013.08.22
  • Accepted : 2013.11.13
  • Published : 2014.02.28
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Abstract

This study investigated the effects of soil depths and soil organic fertilizer application on the growth characteristics of Spiraea bumalda 'Gold Mound' in a extensive green roof system. The treatments were 3 soil depths (10, 15 and 25 cm) and 5 soil types in mixture of artificial soil and organic fertilizer. We measured plant height, leaf width, leaf length, number of flowers, visual quality and survival rate from March to October in 2011. The growing medium of 10 cm soil depth showed the highest plant growth in $A_1$ (amended soil 100%), and the lowest plant growth in $O_1A_4$ (organic fertilizer 20% + amended soil 80%) treatment. In case of 15 cm soil depth, Spiraea bumalda 'Gold Mound' showed a high leaf length and visual quality in $O_1A_2$(organic fertilizer 33% + amended soil 67%) treatment and high leaf width and number of flowers in $O_1$ (organic fertilizer 100%) treatment. $A_1$ treatment without organic fertilizer showed the lowest leaf length and poorest visual quality, and $O_1A_4$ treatment showed the lowest plant height and lowest number of flowers. At soil depth 25 cm, $O_1A_1$ (organic fertilizer 50% + amended soil 50%) treatment showed greater plant height, visual quality and number of flowers than other treatments. The leaf length and leaf width were more effective in $O_1$ treatment. $A_1$ treatment showed a relatively low leaf length, leaf width and visual quality. The higher the organic conditioner, the better the plant growth. And, survival rates of Spiraea bumalda 'Gold Mound' showed 92%, 88% and 76% at soil depths of 25 cm, 15 cm and 10 cm, respectively, in this a extensive green roof system. Therefore, the results showed that the growth of Spiraea bumalda 'Gold Mound' was affected by both soil quality and soil depth. Different optimal mixtures of organic fertilizer and amended soil were determined, depending upon soil depth.

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References

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