Skip Navigation
Return to Layout View | Home | A-Z Directory | my UMaine | MaineStreet | Campus Map | Calendar
Follow UMaine on Twitter | Join UMaine on Facebook | Watch UMaine on YouTube | Admissions | Parents & Family | Apply | Give Now | Emergency

Plant, Soil, and Environmental Sciences

Site Navigation:

Faculty Directory - Ohno

Dr. Tsutomu Ohno
大野  カ

Research Area: Organic Matter Chemistry, Phosphorus Soil Chemistry,



Phone: 207-581-2975

Office: 103 Deering Hall

Go To Books That I Have Enjoyed!

Go To Research Website

Bio: Dr. Ohno received his B.S. degree in Chemistry from Kansas State University in 1977.  He received a M.S. (1981) and Ph.D. (1983) in Soil Science from Cornell University.  He joined the faculty in 1987.  He is currently a Professor of Soil Chemistry.

Teaching:  PSE546 Chemistry of Soils; PSE580 Scientific Communications I; PSE581 Scientific Communications II

Current Research:  My current research efforts focus on the interaction of dissolved organic matter and soil phosphorus in both managed agricultural systems as well as forest ecosystems. My specific projects involve using IR and fluorescence spectroscopy and soft-ionization mass spectrometry to characterize water-soluble organic matter isolated from plant biomass, animal manures, and soils.  The mechanism of bonding of organic matter and phosphorus to mineral surfaces is probed using ATR-FTIR.   Recently my research has utilized multi-dimensional fluorescence spectroscopy combined with PARAFAC to decompose the complex fluorescence landscape into chemically meaningful spectral components.

Recent Publications

Erich, M.S., A. Plante, J.M. Fernandez, E.B. Mallory, and T. Ohno. 2011.  Effects of profile depth and management on the composition of labile and total soil organic matter.  Soil Sci. Soc. Am. J. (in press).

Ohno, T., S. Hiradate, and Z. He. 2011.  Influence of surface charge and phosphorus speciation on water-extractable phosphorus solubility of agricultural soils.  Soil Sci. Soc. Am. J. 75:1704-1711.

Simon, K.S., T. Pipan, T. Ohno, and D.C. Culver. 2010.  Spatial and temporal patterns in abundance and character of dissolved organic matter in two karst aquifers.  Fundam. Appl. Limnol. 177:81-92.

Ohno, T. Z. He, R.L. Sleighter, and P.G. Hatcher. 2010. Ultrahigh resolution mass spectrometry and indicator species analysis to identify marker components of soil- and plant biomass-derived organic matter fractions.  Environ. Sci. Technol. 44:8594-8600.

He, Z., T. Ohno, D.C. Olk, and F. Wu. 2010.  Capillary electrophoresis profiles and fluorophore components of humic acids in Nebraska corn and Philipine rice soils.  Geroderma 156:143-151.

Ohno, T., and A. Amirbahman.  2010.  Phosphorus availability in boreal forest soils: A geochemical and nutrient uptake modeling approach.  Geoderma 155:46-54.

Ohno, T., Z. He, I.A. Tazisong, and Z.N. Senwo.  2009.  Influence of tillage, cropping, and nitrogen source on the chemical characteristics of humic acid, fulvic acid, and water-soluble organic matter fractions of a long-term cropping system study.  Soil Sci. 174:652-660.

He, Z., J. Mao, C.W. Honeycutt, T. Ohno, J.F. Hunt, B.J. Cade-Menum. 2009. Characterization of plant-derived dissolved organic matter by multiple spectroscopic techniques. Bio. Fertility Soils 45:609-616.

He, Z., T. Ohno, F. Wu, D.C. Olk, C.W. Honeycutt, and M. Olanya. 2008. Capillary electrophoresis and fluorescence excitation-emission matrix spectroscopy for characterization of humic substances. Soil Sci. Soc. Am. J. 72:1248-1255.

Hunt, J.F., T. Ohno, and I.J. Fernandez.  2008.  Influence of foliar phosphorus and nitrogen content on chemical properties of water extractable organic matter derived from fresh and decomposed sugar maple leaves.  Soil Bio. Biochem. 40:1931-1939.

Ohno, T., Z. Wang, and R. Bro.  2008.  PowerSlicing to determine fluorescence lifetimes of water-soluble organic matter derived from soils, plant biomass, and animal manures.  Anal. Bioanal. Chem. 390:2189-2194.

Ohno, T., A. Amirbahman, and R. Bro.   2008.  Parallel factor analysis of excitation-emission matrix fluorescence spectra of water-soluble organic matter as basis for the determination of conditional metal binding parameters.  Environ. Sci. Technol. 42:186-192.

Hunt, J.F., T. Ohno, Z. He, and D.B. Dail.  2007.  Inhibition of phosphorus sorption to goethite, gibbsite, and kaolin by fresh and decomposed organic matter.  Biol. Fertility Soils 44:277-288.

Ohno, T., B.R. Hoskins, and M.S. Erich. 2007.  Soil organic matter effects on plant available and water soluble phosphorus.  Biol. Fertility Soils 43:683-690.

Ohno, T., I.J. Fernandez, S. Hiradate, and J.F. Sherman.  2007.  Effects of soil acidification and forest type on water-soluble soil organic matter properties.  Geoderma 140:176-187.

Hunt, J.F., and T. Ohno.  2007.  Characterization of fresh and decomposed dissolved organic matter using excitation-emission matrix fluorescence spectroscopy and multi-way analysis.  J. Agric. Food Chem. 55:2121-2128.

Ohno, T., J. Chorover, A. Omoike, and J. Hunt. 2007. Molecular weight and humification index as predictors of adsorption of plant- and manure-derived dissolved organic matter to goethite. Eur. J. Soil Sci. 58:125-132.

Hunt, J.F., T. Ohno, Z. He, C.W. Honeycutt, and D.B. Dail.  2007.  Influence of decomposition on chemical properties of plant- and manure-derived dissolved organic matter and sorption to goethite. J. Environ. Qual. 36:135-143.

Banaitis, M.R., H. Waldrip-Dail, M.S. Diel, B.C. Holmes, J.F. Hunt, R.P. Lynch, and T. Ohno.  2006.  Investigating sorption-driven dissolved organic matter fractionation by multi-dimensional fluorescence spectroscopy and PARAFAC.  J. Colloid Interface Sci. 304:271-276 .

Ohno, T., and R. Bro.  2006.  Dissolved organic matter characterization using multi-way spectral decomposition of fluorescence landscapes.  Soil Sci. Soc. Am. J. 70:2028-2037.

He, Z., T. Ohno, B.J. Cade-Menun, M.S. Erich, and C.W. Honeycutt.  2006. Spectral and chemical characterization of phosphates associated with humic substances. Soil Sci. Soc. Am. J. 70:1741-1751.

Sherman, J., I.J. Fernandez, S.A. Norton, T. Ohno, and L.E. Rustad. 2006. Soil aluminum, iron, and phosphorus dynamics in response to long-term experimental nitrogen and sulfur additions at the Bear Brook Watershed in Maine, USA. Environ. Monitoring Assessment 121:419-427.

Updated: 31 March 2009

Image Description: Tsutomu Ohno

Back to Faculty Directory


Contact Information

Plant, Soil, and Environmental Sciences
5722 Deering Hall
Orono, Maine 04469-5722
Phone: (207) 581-2947 | Fax: (207) 581-2999
The University of Maine
Orono, Maine 04469
A Member of the University of Maine System