Effect of Gypsum, Popped Rice Hull and Zeolite on Soil Aggregation in Reclaimed Tideland

간척지 토양에서 석고, 팽화왕겨 및 Zeolite 처리가 토양의 입단형성에 미치는 영향

  • Kim, Seong-Jo (Div. of Life-Environment, College of Life Science and Natural Resources, Wonkwang University) ;
  • Baek, Seung-Hwa (Dept. of Food Science and Biotechnology, Chungbuk Provincial University of Science & Technology) ;
  • Lee, Sang-Uk (Div. of Life-Environment, College of Life Science and Natural Resources, Wonkwang University) ;
  • Kim, Dae-Geun (Div. of Life-Environment, College of Life Science and Natural Resources, Wonkwang University) ;
  • Na, Young-Joon (Div. of Life-Environment, College of Life Science and Natural Resources, Wonkwang University)
  • 김성조 (원광대학교 생명환경학부) ;
  • 백승화 (충북과학대학 식품생명과학과) ;
  • 이상욱 (원광대학교 생명환경학부) ;
  • 김대근 (원광대학교 생명환경학부) ;
  • 나영준 (원광대학교 생명환경학부)
  • Received : 2005.08.29
  • Accepted : 2005.09.20
  • Published : 2005.10.30

Abstract

Gypsum treated to fine sandy loam increased the fornation of >2 mm aggregates in $1,550kg\;CaSO_4{\cdot}2H_2O\;10a^{-1}$ (Kbfg1) and $3,100kg\;CaSO_4{\cdot}2H_2O\;10a^{-1}$ (Kbfg2) to compare with control, Kc, at 60DAT, and bigger aggregates in general at 90DAT. The higher treatment of gypsum level, the <0.1 mm aggregates were less decreased as in Kbfg1, Kbfg2, and $6,200kg\;CaSO_4{\cdot}2H_2O\;10a^{-1}$ (Kbfg3) and aggregates of 0.25->2 mm were increased with increasing level of gypsum with more effective in Kbfg2 and Kbfg3 at 120DAT. Gypsum treated to silt loam increased aggregates of 2.0-1.0 and 1.0-0.5 mm in $3,100kg\;CaSO_4{\cdot}2H_2O\;10a^{-1}$ (Mbfg2) to compare with control (Mc), at 60DAT. Degrees of aggregation from 0.5-0.25 mm to >2 mm aggregates at 90DAT were distinctly higher. The higher treatment of gypsum level accelerated more aggregation of silt loam soil, and aggregates of 0.5-0.25 mm was most increased in Mbfg2 at 120DAT. Popped rice hulls treated to fine sandy loam increased aggregates of 2.0-1.0 mm in plots of $1,000kg\;10a^{-1}$ (Kbfhl) only to compare with control (Kc), at 60DAT, and aggregates of >2 mm and 2.0-1.0 mm Kbfh1 at 90DAT. At 120DAT, aggregation by popped rice hulls was most effective in Kbfbl pot. Popped rice hulls treated to silt loam increased in aggregates of >2 mm and 2.0-1.0 mm in $2000kg\;10a^{-1}$, Mbfb2 to compare with control, Mc, at 60DAT. Degrees of aggregation by popped rice hulls at 90DAT were higher in $1,000kg\;10a^{-1}$, Mbfh1, and Mbfh2, and at 120DAT was in $3,000kg\;10a^{-1}$, Mbfb3. Zeolite treatment with popped rice hulls, $1,500kg\;10a^{-1}$, increased in >2.0 mm aggregates in $1,000kg\;10a^{-1}$, Kbfbz1, $2,000kg\;10a^{-1}$, Kbfbz2, $3,000kg\;10a^{-1}$, Kbfhz3, and Mbfbz1, $1,000kg\;10a^{-1}$, Mbfbz2, $2,000kg\;10a^{-1}$, and $3,000kg\;10a^{-1}$, Mbthz3, to compare with control (Kc and Mc), at 60DAT. irrespective of soil texture. At 90DAT, >2.0-0.5 mm aggregates increased in Kbfhz1 of fine sandy loam. aggregates of >0.25 mm in $200kg\;10a^{-1}$ (Mbfbz1), $400kg\;10a^{-1}$ (Mbfhz2), $800kg\;10a^{-1}$ (Mbfhz3) of silt loam increased with the level of zeolite treatment. At 120DAT, the effect of zeolite treated to both soils showed the decrease of <0.1 mm aggregates. As the result, soil amendments for soil aggregation was more effective in the order of popped rice hulls+Zeolite > gypsum > popped rice hulls in fine sandy loam, and in the order of gypsum > popped rice huUs+zeolite > popped rice hulls in silt loam, respectively.

본 연구는 간척지 토양인 계화도의 세사양토 와 김제 진봉의 미사질양토에 대하여 이수석고, 팽화왕겨, zeolite 등의 토양개량제가 입단형성에 미치는 영향을 조사하였다. 이수석고 처리 후 세사양토의 입단화율은 60일째의 경우 대조군 보다 Kbfg1과 Kbfg2에서 2 mm 이상의 입자비율이 증가하였고, 90일째는 Kbfg2의 입자크기 증가율이 높았으며, 120일째는 Kbfg1, Kbfg2, Kbfg3에서 0.1 mm 이하의 입자비율이 감소하였고, 다른 크기의 입자비율이 증가되었는데 특히 Kbfg2와 Kbfg3가 양호하였다. 또한 미사질양토의 업단화율은 60일째 대조군보다 Mbfg2에서 2.0-1.0 mm, 1.0-0.5 mm의 입자비율이 증가되었고, 90일째 Mbfg1과 Mbfg2에서 0.5-0.25 mm 이상부터 뚜렷한 증가를 나타내었으며, 120일째 모든 시험구가 입단화를 촉진하였고, 특히 Mbfg2에서 0.5-0.25 mm의 입자비율이 뚜렷하게 증가되었다. 팽화왕겨 처리 후 세사양토의 입단화율은 60일째 Kbfh1에서만 2.0-1.0 mm의 입자비율이 증가하였고, 90일째 Kbfh1에서 2.0 mm 이상 및 2.0-1.0 mm가 증가하였으며, 120일째는 Kbfh1가 양호하였다. 또한 미사질양토의 경우 입단화율은 60일째 Mbfh2에서 2.0 mm 이상과 2.0-1.0 mm가 증가하였고, 90일째는 Mbfh1과 Mbfh2가 양호하였으며, 120일째는 Mbfh3가 양호하였다. 팽화왕겨와 제오라이트 처리 후 세사양토의 입단화율은 60일째 Kbfhz1, Kbfhz2, Kbfhz3에서 2 mm 이상의 입자비율이 증가하였고, 90일째는 Kbfhz1에서 1.0-0.5 mm 이상의 입자비율이 증가하였으며, 120일째는 모든 시험구에서 0.1 mm 이하의 입자비율이 감소한 대신 다른 입자비율이 증가하였고, 특히 Kbfhz3에서 2 mm 이상 및 1.0-0.5 mm의 입자비율이 증가하였다. 또한 미사질양토의 입단화율은 60일째 Mbfhz1, Mbfhz2, Mbfhz3에서 2 mm 이상의 입자비율이 증가하였고, 90일째는 Mbfhz1, Mbfhz2, Mbfhz3에서 0.25 mm 이상의 입자비율이 증가한 가운데 특히, Mbfhz1이 양호하였다. 120일째는 모든 시험구에서 0.1 mm 이하의 입자비율이 감소한 대신 다른 입자의 비율이 증가하였고, 특히 Mbfhz2가 우수하였다.

Keywords

References

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