Soil Management
Staff
Research Topics
How to reduce greenhouse gas emissions from soil amended with organic matter?
Agriculture is responsible for emissions of greenhouse gases such as carbon dioxide (CO2) and nitrous oxide (N2O). Production of these gases in soil results from the biological processes like organic matter decomposition, nitrification and denitrification. These processes are regulated by easily decomposable carbon, mineral nitrogen, temperature, pH and moisture content in soil. We aim at analyzing effects of these parameters on CO2 and N2O emissions. In particular, we are interested in agricultural soil amended with livestock compost. |
Analysis of groundwater contamination with inorganic N in Central Vietnam by using stable isotopes and microbial technologies
High concentrations of inorganic nitrogen (NH4-N and/or NO3-N) were found in groundwater below vegetable fields in the downstream areas of the Huong River, Central Vietnam. The objective of the study is to determine the contamination sources and mechanisms of nitrogen contamination in groundwater by using 15N natural abundance (δ15N) and functional genes of microorganisms. We have developed a new method to collect NH4-N, NO3-N, and organic N in water samples for δ15N analysis. Functional genes like narG, napK, and nosZ are quantified to obtain the information on nitrogen dynamics in deep soil. |
Publication List
- Wakai, N., Maeda, M., T., Ono, Hanafusa, T., Yamashita, J., and Saito, K.: Radiocesium concentration in stems, leaves, and panicles of rice grown in a sandy soil replacement paddy field treated with different rates of cattle manure compost in Kawamata, Fukushima, Journal of Environmental Science for Sustainable Society, 9, 1-10 (2019)
- Hoang, V.N.T. and Maeda, M: Interactive effects of ammonium application rates and temperature on nitrous oxide emission from tropical agricultural soil, Soil Science and Plant Nutrition, 64(6), 767-773
- Hayami Y., M. Maeda: Effects of nitrate content and moisture in nutrient accumulated soil on eggplant (Solanum. melongena L.) growth and nutrient uptake, Japanese Journal of Soil Science and Plan Nutrition, 89 (3), 204-212 (2018)
- Tran, Q.T., Maeda, M., Oshita, K., Takaoka, M and Saito, K.: Phosphorus and potassium availability from cattle manure ash in relation to their extractability and grass tetany hazard, Soil Science and Plant Nutrition, 369-376 (2018)
- Nguyen V. H., M. Maeda: Effects of pH and oxygen on phosphorus release from agricultural drainage ditch sediment in reclaimed land, Kasaoka Bay, Japan, Journal of Water and Environment Technology, accepted, 2016
- Ha, T.T. K., M. Maeda, T. Fujiwara, H. Nagare, S. Akao: Effects of soil type and nitrate concentration on denitrification products (N2O and N2) under flooded conditions in laboratory microcosms, Soil Science and Plant Nutrition, 61 (6), 999-1004 (2015)
- Maeda, M., Kayano, E., Fujiwara, T., Nagare, H. and Akao S.: Nitrous oxide emissions during biological soil disinfestation with different organic matter and plastic mulch films in laboratory-scale tests, Environmental Technology, 37(4), 432-438 (2015)