Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Changes in Soil Biota Affected by the Application of Organic Materials in Reclaimed Upland and Paddy-converted Soils Cultivated with Korea Ginseng

개간 및 답전윤환 인삼재배지에서 유기물처리에 따른 토양생물상 변화

  • Eo, Jin-U (Department of Herbal Crop Research, Rural Development Administration) ;
  • Park, Kee-Choon (Department of Herbal Crop Research, Rural Development Administration) ;
  • Yeon, Byung-Ryul (Department of Herbal Crop Research, Rural Development Administration)
  • 어진우 (농촌진흥청 국립원예특작과학원) ;
  • 박기춘 (농촌진흥청 국립원예특작과학원) ;
  • 연병열 (농촌진흥청 국립원예특작과학원)
  • Received : 2011.09.22
  • Accepted : 2011.10.14
  • Published : 2011.10.31
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Abstract

Cultivation of Korea ginseng in newly reclaimed and paddy-converted fields has been increasing, and evaluation of organic amendment effectiveness is needed in the two soil types. Soil organisms influence organic matter decomposition, and their responses to applications of organic matter were studied. De-oiled cake and compost were applied at $20Mg\;ha^{-1}$ and $40Mg\;ha^{-1}$ in both soil types. Changes in microflora were assessed by analyzing phospholipid fatty acid (PLFA). The abundance of nematodes and microarthropods was measured. Microbial PLFA indicators for microorganisms and microarthropod abundance were greater in reclaimed upland than in paddy-converted soil. There were few differences in the microflora and fauna of reclaimed uplands, regardless of treatment. In paddy-converted soil, the abundance of Oribatida was increased by the application of compost at $20Mg\;ha^{-1}$ and was correlated with PLFA indicators of fungi. The results suggested a minimal influence of organic amendments in reclaimed upland, because the organic matter content and abundance of soil organisms are low in mineral soils. In paddy-converted soil, the effects of organic amendment differ among different soil organisms, and soil properties are important mediators of the effect.

인삼재배에서 논전환밭의 이용이 증가하는 추세이며, 개간밭과 더불어 유기물투입의 효과를 조사할 필요가 있다. 토양생물은 유기물의 분해에 영향을 미치는 중요한 요소이기 때문에 유기물 시용이 토양생태계에 미치는 영향을 조사했다. 유박과 퇴비를 개간밭과 논전환밭에 $20Mg\;ha^{-1}$ 와 $40Mg\;ha^{-1}$로 투입하였다. 미생물상 변화는 인지 질지방산을 분석하여 검정하였고, 동물상의 변화는 미소동물의 개체밀도를 측정하였다. 미생물에 대한 PLFA 지수나 미소동물의 밀도는 개간밭보다 논전환밭에서 높았다. 개간밭에서는 유기물 투입에 의한 처리간 차이가 적었다. 논전환밭에서는 퇴비 $40Mg\;ha^{-1}$ 처리구에서 날개응애 밀도가 증가하였고, 이들의 밀도는 곰팡이 PLFA와 양의 상관관계가 나타났다. 위의 결과는 개간밭에서 유기물 함량이나 토양생물의 밀도가 낮은 심토로 개간하면 유기물을 투입하여도 토양생물에 대한 효과가 적을 수 있다는 것을 보여준다. 논전환밭에서는 유기물에 대한 토양생물들의 반응이 다르며 토양의 물리화학성도 토양생태계에 영향을 미칠 수 있다. 논전환밭과 개간밭에서는 유기물에 대한 토양생물의 반응이 다르므로, 투입된 유기물의 분해나 이에 따른 양분의 순환이 다를 수 있기 때문에 두 토양에서 시비방법을 다르게 할 필요성이 있다고 생각된다.

Keywords

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