Assessment of Microbial Decomposition in Soil Organic Matter Accumulation with Depth in Golf Greens

골프장 그린에서 토심별 토양 유기물 집적에 대한 미생물 분해성 평가

  • Huh, Keun-Young (Dept. of Landscape Architecture, Jinju National University) ;
  • Kim, In-Hea (Dept. of Landscape Architecture, Jinju National University) ;
  • Deurer, Markus (Plant and Food Research Ltd.)
  • 허근영 (진주산업대학교 조경학과) ;
  • 김인혜 (진주산업대학교 조경학과) ;
  • Published : 2009.10.31

Abstract

Excessive soil organic matter (SOM) is detrimental to turfgrass quality when used intensively in sand-based root zones, thereby affecting the sustainability of turfgrass systems. As part of a major project examining the sustainable management of SOM on golf greens, microbial decomposition on soil organic matter accumulation with depth was assessed and the effect of soil air-condition improvement and Ca fertilization was investigated by soil microbial respiration (SMR). Three soil samples from three depths(0~5, 5~10, and 10~15cm) of 5 year and 30 year old green were analyzed for SOM content. In 30 year old green, SMR and dehydrogenase activity(DHA) were analyzed to assess the soil microbial decomposition with depth. It was then divided into 4 plots: untreated as a control, dolomite-treated, 0~5cm deep section-removed, and 0~5 cm deep section-removed+dolomite-treated. After treatment, three soil samples were taken at 1, 2 and 4 weeks by the above-mentioned method, and analyzed for SMR to better understand SOM decomposition. SOM accumulation in the 0~5cm depth of golf greens can be controlled by intensive cultivation such as coring, but below 5cm is more difficult as the results showed that SOM content below 5cm increased over time. Soil microbial decomposition of organic matter will be necessary to reduce SOM accumulation, but SMR below 5cm was low and wasn't significantly altered by increasing exposure to air and fertilizing with Ca. As a result, aeration treatments such as coring and Ca fertilization might not be effective at improving soil microbial decomposition below 5cm depth in aged greens.

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