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宇都宮大学 農学部 農業環境工学科
土壌・生物環境物理学研究室
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■研究
本研究室は、土壌の物質輸送・保持特性の実態解明・モデル化に関する課題に、取り組んでいます。
■卒業論文
| Graduated in | Name | Title |
| 2011.3 | Tatsuya NAGAI | Unsaturated hydraulic conductivity in pristine and drained peat layers |
| 2011.3 | Ryutaro SOMA | Gas diffusion coefficient of pristine- and drained-areas in peatlands |
| 2011.3 | Chigusa TSUJI | Soil gas diffusivity measurement with CO2-air- and N2-air-binary diffusion |
| 2012.3 | Kazuma MASAKI | Soil gas diffusivity measurement for water soluble gases |
| 2013.3 | Ryosuke IKEDA | Transition of Soil CO2 profiles affected by the distance from a tree |
| 2013.3 | Yuma WADA | Development of a CO2 measurement system with a portable infrared CO2 probe |
| 2013.3 | Hitomi AKUTSU | Comparison of soil water movement in top soils of grassland at various distances from a tree |
| 2013.3 | Takumi HIRAI | Evaluation of trunk-radial profile of sap flow and transpiration with thermal dissipation method |
| 2013.3 | Naoki KOIKE | Direct measurements of soil water distribution around a tree in a grassland |
| 2013.3 | Chihiro TSUNEKAWA | Observation of groundwater recharge in the presence of tree water uptake |
| 2014.3 | Hiroki AJITO | Depth profiles of soil moisture condition in rooting depth around a tree row |
| 2015.3 | Takayuki HOSHINO | Seasonal behaviors of in-situ matric potential and water storage in a grassland soil |
| 2015.3 | Daiki IIMURA | Development of a CO2 gas analyzing system and its application to soil gas monitoring in a field |
| 2015.3 | Natsumi GOKA | Comparison of soil moisture hysteresis between a volcanic ash soil and a loamy soil |
| 2015.3 | Koki TEZUKA | Predicting the hydraulic conductivity of unsaturated soils from soil moisture characteristic curves |
| 2015.3 | Yukio USUI | Probing moisture hysteretic behaviors in soil gas diffusivity |
| 2016.3 | Maiko CHO | Effects of soil moisture hysteresis on soil gas diffusivity |
| 2016.3 | Temma KURATA | Effects of soil pore structure on unsaturated hydraulic conductivity |
| 2016.3 | Kota TSUKAGOSHI | Changes in soil CO2 production through grassland renovation |
| 2017.3 | Hikaru SHOJI | Seasonal behaviors of the depth profile of in-situ soil CO2 production rates |
| 2018.3 | Karen ARAKAWA | Transition of in-situ soil moisture characteristics |
| 2018.3 | Hayato SUTO | Seasonal changes in dissolved CO2 flux in in-situ soil layers |
| 2019.3 | Miharu ANZAI | Measurement of soil pH under CO2 equilibrium between gas and liquid phases |
| 2019.3 | Kosuke OGASAWARA | Seasonal transition in soil water retentivity in a field |
| 2019.3 | Yusuke SAKANISHI | Changes in vertical profile of water potential near the land surface |
| 2020.3 | Jota KANEKO | Seasonal change in water conductance across a soil-atmosphere boundary |
| 2020.3 | Seiya TAKAKI | Estimation of infiltration rate of a field soil based on moisture condition
and hydraulic conductivity of the soil |
| 2020.3 | Nao TOTSUKA | Effects of in-situ soil moisture hysteresis on plant available water |
| 2021.3 | Keisuke KANISAWA | Estimation of thermal damping depth by monitoring diurnal fluctuation of soil temperature |
| 2021.3 | Chisato KAMOI | Estimation of soil thermal diffusivity through observation of soil temperature |
| 2021.3 | Chihiro KUROKAWA | Soil respiration rate analysis based on the depth profile of gaseous CO2 concentration |
*現在、卒業論文執筆中
■修士論文
| Graduated in | Name | Title |
| 2013.3 | Chigusa TSUJI | Soil gaseous behaviors affected by soil hardening in a top soil layer |
| 2013.3 | Tatsuya NAGAI | Soil moisture profiles with various groundwater table levels in peatlands |
| 2015.3 | Takumi HIRAI | Evaluation of plant availability of water and nutrition in soil |
| 2017.3 | Takayuki HOSHINO | Field monitoring of hysteretic behaviors in soil moisture characteristics |
| 2018.3 | Temma KURATA | Evaluation for the hydraulic conductivity based on field-monitored Soil moisture condition |
| 2020.3 | Hayato SUTO | Influence of soil gaseous CO2 profile on soil pH conditions in a field soil layer |
| 2021.3 | Miharu ANZAI | Soil pH affected by liquid-gaseous equilibrating process of CO2 in soil |
*現在、修士論文執筆中
■学術論文
Iiyama I, Osawa K, Surface O2 influx related to soil O2 profiles in a drained
tropical peatland. Soil Science and Plant Nutrition, 56, 517-520 (2010)
(doi: 10.1111/j.1747-0765.2010.00488.x).
Iiyama I, Osawa K, Nagata O, Soil O2 profile affected by gas diffusivity
and water retention in a drained peat layer. Soils and Foundations, 52,
49-58 (2012) (doi:10.1016/j.sandf.2012.01.005).
Suzuki K, Iiyama I, Detection of transition in wetland environment using
GeoEye-1 satellite imagery. J JSPRS, 51(3), 146-150 (2012). (in Japanese
with English summary)
Iiyama I, Osawa K, Nagai T, A seasonal behavior of surface soil moisture condition in a reclaimed tropical peatland. Soil Science and Plant Nutrition, 58, 543-552 (2012) (doi: 10.1080/00380768.2012.723222).
Eguchi S, Sawamoto M, Shiba M, Iiyama I, Hasegawa S, Wellbore-wall compression
effects on monitored ground water levels and qualities. Ground Water, 51(3),
452-460. (2013) (doi:10.1111/j.1745-6584.2012.00979.x.).
Iiyama I, Hirai T, Subsoil water available in suction and poor in amount
under continuous grassland use. Soil Science and Plant Nutrition, 60(4),
439-447 (2014) (doi: 10.1080/00380768.2014.915199.).
Iiyama I, Iimura D, A simple CO2 gas analyzing system for soil gas samples,
J Jpn Soc Soil Phys, 128, 33-38 (2014). (in Japanese with English summary)
Iiyama I, Differences between field-monitored and laboratory-measured soil
moisture characteristics. Soil Science and Plant Nutrition, 62(5-6), 416-422
(2016) (doi:10.1080/00380768.2016.1242367.).
Iiyama I, Characteristicsn of an in-situ unsaturated hydraulic conductivity
of soil. Soil Science and Plant Nutrition, 65(3), 215-222 (2019) (doi:10.1080/00380768.2019.1593793.).