서울대학교 · 농업·생명과학
이 교수의 연구실은 토양에서의 질소 순환 메커니즘과 질소 순환 과정에서의 동위원소 분수 효과, 토양 구조와 수분 보유 특성 간의 관계를 중심으로 한 토양생태학 및 토양물리학 분야에서 활발히 연구를 진행하고 있습니다. 특히, 토양 수분 조건이 질소 변환 반응(예: 질산화)에 미치는 영향과 토양 텍스처가 해안 갈라지대의 질소 제거 메커니즘에 어떻게 작용하는지에 중점을 두고 있으며, 토양 입도 분포와 수분 보유곡선 간의 비대칭성을 고려한 새로운 모델링 기법도 개발하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
To interpret the response of ammonia oxidation to changing soil moisture, we conducted a batch aerobic incubation with a loam soil at different soil water potentials (SWP) from −1100 to −11 kPa, and calculated net nitrification rates and apparent isotope fractionation factors (αs/p). With increasing SWP, net nitrification rates increased from 2.3 to 9.8 mg N kg−1 d−1, while αs/p increased from 1.025 to 1.031 at field-capacity (SWP of −33 kPa) but decreased with increasing SWP above field capacit
Tidal-flats play important roles in oceanic nitrogen (N) cycles. Particularly, N loss in the tidal-flats depends on soil texture and yet the dominant N removal mechanism in relation to soil texture is not clear. Therefore, the objective of this study was to investigate the effect of soil texture on NO3−-N removal and transport in texturally contrasting tidal-flats of the western coast of Korea [Gangwha (GH, silt) and Saemangeum (SMG, loamy sand) sites]. To interpret the experimental results, we
By examining the symmetry between the distributions of particle‐size (PSD) and pore‐size (POD) in a soil, as hypothesized by early pore‐solid fractal (PSF) models, we found significant discrepancies in fractal dimensions between the PSD and the water retention curve (WRC) of a soil. Therefore, we developed an asymmetry‐based PSF model to estimate better the WRC directly from the PSD data of a soil. To do so, we adopted the concept of a microscopic arrangement of different‐sized particles to addr
SummaryA pot-lysimeter experiment was designed to assess the N requirements of 'Fuji'/M.9 apple (Malus domestica Borkh.) trees fertilized by drip irrigation with three N rates during 2.5 growing seasons (July 1996 to October 1998). Nitrogen rates of 17 (low), 34 (medium), and 67 mg l–1 (high) were chosen for comparison. Low, medium, and high N rates averaged 0.47, 0.89, and 2.18.g N tree–1 for 1996; 1.07, 2.35, and 4.90 g N tree–1 for 1997; 3.81, 6.93, and 13.69 g N tree–1 for 1998. Correspondin
