Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Increased Available Phosphate by Shell Meal Fertilizer Application in Upland Soil

밭 토양에서 패화석비료 시용에 따른 유효인산의 증대

  • Lee, Chang-Hoon (Division of Applied Life Science, Graduate School, Gyeongsang National University) ;
  • Lee, Ju-Young (Division of Plant Nutrition, National Institute of Agricultural Science and Technology, RDA) ;
  • Ha, Byung-Hyun (Product Development Team, Namhae Chemical Co.) ;
  • Kim, Pil-Joo (Division of Applied Life Science, Graduate School, Gyeongsang National University)
  • 이창훈 (경상대학교 대학원 응용생명과학과) ;
  • 이주영 (농업과학기술원 식물영양과) ;
  • 하병연 (남해화학 중앙연구소) ;
  • 김필주 (경상대학교 대학원 응용생명과학과)
  • Received : 2005.01.13
  • Accepted : 2005.01.31
  • Published : 2005.02.28
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Abstract

Previous studies showed that shell meal fertilizer from the oyster farming industry could be a potential inorganic soil amendment to increase Chinese cabbage productivity and to restore the soil nutrient balance in upland soil (Lee et al., 2004). Herein, shell meal fertilizer was applied at rates of 0, 4, 8, 12, and $16Mg\;ha^{-1}$ to upland soil (Pyeontaeg series, Fine silty, Typic Endoaquepts) for Chinese cabbage cultivation. We found available phosphate increased significantly with shell meal fertilizer application, due to high content of phosphate ($1.5g\;P_2O_5\;kg^{-1}$) in the applied shell meal fertilizer. In addition, high pH of shell meal fertilizer contributed to increase available phosphate content by neutralization of acidic soil. Total and residual P contents increased significantly with increasing shell meal fertilizer application, but we could not find any tendency in organic and inorganic P fraction. Of extractable P fraction, water-soluble phosphorus (W-P) and calcium-bound P (Ca-P) contents increased significantly with increasing application level. By contrast, aluminum and iron-bound P (Al-P and Fe-P) decreased slightly with shell meal application. The present experiment indicated that shell meal fertilizer had a positive benefit on increasing available phosphate content in arable soil. And so the increased available phosphate by shell meal fertilizer may decrease phosphate application level and then reduce phosphorus loss in arable soil.

굴껍질을 주원료로 하는 패화석비료가 토양개량제로서 배추의 생육 및 수량을 증진시키고 토양의 이화학적 특성 개선에 효과가 있는 것으로 알려져 있다. 평택통 (Fine silty, Typic Endoaquepts)의 밭 토양에 굴패화석비료를 0, 4, 8, 12, and $16Mg\;ha^{-1}$ 처리하여 봄배추를 재배하는 과정 중 패화석비료 시용량이 증가함에 따라 토양내 유효인산함량은 일정하게 증가되는 것이 확인되었다. 유효인산 함량의 증가는 1차적으로 패화석비료내 포함된 인산 ($1.5g\;P_2O_5\;kg^{-1}$)의 직접투입이 토양 내 전 인산을 증가시키고 유효인산을 증진시킨 것으로 평가되었다. 그리고 알카리성 제재인 패화석비료가 pH 5.8의 공시토양의 pH를 중성범위로 높이면서 간접적으로 유효인산함량을 증진시킨 것으로 해석되었다. 패화석비료의 시용량이 증가함에 따라 토양내 수용성 인산과 Ca-P 함량을 다소 증가시켰으나, Al-P와 Fe-P의 비율을 크게 감소되었다. 결과적으로 패화석비료는 토양내 유효인산함량 증진에 효과가 있으며, 이렇게 많아진 유효인산을 이용하여 인산시비량을 저감하고 나아가 인산유출을 저감할 수 있는 방법이 될 수 있을 것으로 판단된다.

Keywords

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