Journal of the Korean Institute of Landscape Architecture (한국조경학회지)

The Korean Institute of Landscape Architecture (한국조경학회)
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Organic Matter Dynamics on Golf Course Greens

골프장 그린에서 토섬별 유기물의 경시적 변화

  • Huh, Keun-Young (Dept. of Landscape Architecture, Jinju National University) ;
  • Ko, Byong-Gu (Environment and Ecology Division, National Institute of Agricultural and Science Technology)
  • 허근영 (진주산업대학교 조경학과) ;
  • 고병구 (농업과학기술원 환경생태과)
  • Published : 2008.08.31
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Abstract

The management of soil organic matter(SOM) is a key component of golf course green maintenance. As part of a major project examining the sustainable management of SOM on golf course greens, the SOM status of different age greens maintained in the same root zone composition and management were compared. Then the microbial activity, tiller number, bulk density, water content, pH, EC, and T-N in the soil were measured. In the 0${\sim}$5cm depth SOM accumulation showed no significant difference between greens. Below 5cm SOM showed a strong significance between greens and had a positive(+) correlation with year and negative(-) correlation with depth. when regression equations were used to predict SOM accumulation with year and depth, SOM below 5cm tended to increase with a rate of 0.061% . year$^{-1}$ and decrease with a rate of 0.079% . $cm^{-1}$(R2==0.841). Soil microbial activity was investigated with age and depth by using a dehydrogenase assay. Results showed a sharp drop with depth in all greens. The soil microbial activity below 5cm showed no difference between greens. The accumulated SOM below 5cm may be very resistant to decomposition in the long-term. Five years after establishment, the bulk density did not significantly change. The water content, EC, and T-N had a significant correlation with SOM. The pH decreased with the year, which may influence SOM accumulation. Organic matter accumulation was mainly affected by the pH decrase，low soil microbial activity, and high organic matter resistant to decomposition, but the effects of water content, EC, and T-N were obscure.

토양 유기물 관리는 골프장 그린 관리 중 핵심적인 요소이다. 골프장 그린의 유기물에 대한 지속적인 관리를 연구하는 중요한 프로젝트의 일환으로서, 우리는 동일한 근권부 조성과 관리 하에서 유지되고 있는 서로 다른 조성 시기의 그린들에서 토양 유기물의 상태를 비교하였다. 그리고 그 토양 미생물 활성, 잔디 분얼경수, 용적밀도, 수분함량, pH, EC, 그리고 총질소를 측정하였다. 토심 0${\sim}$5cm에서 토양 유기물 집적은 그린들 간에 유의차를 보이지 않았다. 토심 5cm 이하에서 SOM은 그린들 간에 강한 유의차를 보였고, 경과 연수와 정(+)의 상관을 가졌고 토심과 음(-)의 상관을 가졌다. 토심 5${\sim}$25cm 단층부에서는 시간 경과와 토섬에 따른 SOM의 집적을 예측하기 위해서 회귀 분석한 결과에서 그린의 경과 연수가 증가함에 따라서 유기물 함량이 0.061% year$^{-1}$로 증가하고， 토심이 깊어질수록 유기물 함량이 0.079% cm$^{-1}$로 감소하는 것으로 나타났다. 경과 연도와 토심에 따른 토양 미생물 활성이 탈수소효소 검정을 이용하여 측정되었다. 결과는 모든 그린들에서 토심에 따라서 급격한 감소를 보였다. 토심 5cm 이하에서 토양 미생물 활성은 그린툴 간에 유의차가 없음을 보였다. 집적된 토심 5cm 이하의 SOM은 장기적으로 분해에 대하여 강한 저항성을 가지는 것으로 보인다. 그린 조성 후 5년부터 용적밀도는 유의성 있는 변화를 나타내지 않았다. 수분함량, Ee, 그리고 총질소는 SOM과 유의성 있는 상관을 가지고 있었다. pH는 시간이 경과하며 낮아졌는데, 이것은 SOM 집적에 영향을 미칠 것이다. 유기물 집적은 pH 저하, 미생물 활성 감소 토양 유기물의 분해 저항성 증가 등에 주요하게 영향을 받았지만, 수분 함량, EC, 총질소에 의한 영향은 분명하지 않았다.

Keywords

References

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