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제주지역 농경지 이용유형별 토양 탈수소효소활성과 미생물체량

Soil Dehydrogenase Activity and Microbial Biomass C in Croplands of JeJu Province

  • Joa, Jae-Ho (National Institute of Horticultural & Herbal Science, RDA) ;
  • Moon, Kyung-Hwan (National Institute of Horticultural & Herbal Science, RDA) ;
  • Choi, Kyung-San (National Institute of Horticultural & Herbal Science, RDA) ;
  • Kim, Seong-Cheol (National Institute of Horticultural & Herbal Science, RDA) ;
  • Koh, Sang-Wook (National Institute of Horticultural & Herbal Science, RDA)
  • 투고 : 2013.03.15
  • 심사 : 2013.04.05
  • 발행 : 2013.04.30

초록

본 연구는 제주지역 농경지 이용유형과 토양특성별 미생물체량과 탈수소효소활성을 평가 하고자 수행하였다. 제주지역 밭(50), 과수원(50), 논(30), 시설재배(30) 토양을 3월에 채취 후 토양화학성과 탈수소효소활성, 미생물체량을 분석하였다. 밭 토양의 평균 pH는 6.3이었고 과수원, 시설재배지 토양은 조사지점간에 화학성분 함량의 차이가 크게 나타났다. 돈분퇴비를 시용하는 감귤재배농가의 토양 내 아연과 구리함량은 증가하는 경향을 보였다. 토양 탈수소효소활성과 미생물체량은 농경지 이용유형에 상관없이 비화산회 토양이 화산회토양보다 높았다. 탈수소효소활성은 밭 토양이 과수원, 논, 시설재배지 토양보다 2-4배 이상 높았고 비화산회토의 밭토양은 38.7 ug TPF $24^{h-1}g^{-1}$를 나타냈다. 미생물체량은 시설재배지 토양이 가장 많았으며 시설재배지 비화산회토양은 216.8 $mg\;kg^{-1}$였다. 시설재배지의 비화산회토양은 탈수소효소활성과 토양유기물($R^2$=0.59), 아연($R^2$=0.65), 구리($R^2$=0.66)의 함량간에 높은 정의 상관관계를 보였다. 화산회토의 밭토양은 유기물함량과 탈수소효소 활성간에 높은 부의상관관계($R^2$=0.57)를 나타냈다.

This study was carried out to evaluate the soil dehydrogenase activity and microbial biomass C with soil type and land use in cropland of JeJu region. Soil chemical properties, dehydrogenase activity, and microbial biomass C were analyzed after sampling from upland (50 sites), orchard (50 sites), paddy (30 sites), horticultural facility (30 sites) in March. Average pH values was at 6.3 in upland soil, however soil chemical properties showed a large spatial variations in both orchard and horticultural facility soil. The Zn and Cu contents increased by the continuous application of pig manure compost in some citrus orchard soil. Soil dehydrogenase activity and microbial biomass C were higher in non-volcanic ash than in volcanic ash soil regardless of land use type. Soil dehydrogenase activity was two to four times higher in upland than in the others. It was at 38.7 ug TPF $24^{h-1}g^{-1}$ in non-volcanic ash of upland soil. Microbial biomass C content was very high in horticultural facility soil and it showed at 216.8 $mg\;kg^{-1}$ in non-volcanic ash. Soil dehydrogenase activity showed a positive correlation with organic matter ($r^2$=0.59), Zn ($r^2$=0.65), and Cu ($r^2$=0.66) in non-volcanic ash horticultural facility soil. There was a negative correlation ($r^2$=0.57) between soil organic matter and dehydrogenase activity in volcanic ash upland soil.

키워드

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