A5013746530- Rice Cultivation and Yield Improvement
- Soil Carbon and Nitrogen Dynamics
- Atmospheric and Environmental Gas Dynamics
- Climate change impacts on agriculture
- Plant responses to water stress
- Water-Energy-Food Nexus Studies
- Agriculture Sustainability and Environmental Impact
- Microbial metabolism and enzyme function
- Anaerobic Digestion and Biogas Production
- Methane Hydrates and Related Phenomena
- Plant Water Relations and Carbon Dynamics
- Soil and Unsaturated Flow
- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Peatlands and Wetlands Ecology
- Environmental Impact and Sustainability
- Climate variability and models
- Groundwater and Isotope Geochemistry
- Transboundary Water Resource Management
- Biofuel production and bioconversion
- Insect and Arachnid Ecology and Behavior
- Agricultural Systems and Practices
- Plant nutrient uptake and metabolism
- Soil erosion and sediment transport
- Energy and Environment Impacts
International Rice Research Institute
2015-2024
Karlsruhe Institute of Technology
2014-2023
Center for International Forestry Research
2023
Wageningen University & Research
2001-2023
World Agroforestry Centre
2023
Kiel University
2022
Garmisch-Partenkirchen Medical Center
1993-2021
Institute for Food and Environmental Research
2008-2009
FZI Research Center for Information Technology
2008
Agricultural Research Service
2003-2004
Abstract: Plant root exudates play important roles in the rhizosphere. We tested three media (nutrient solution, deionized water and CaSO 4 solution) for periods of time (2, 6 h) collecting soil‐grown rice plants. Nutrient culture solution created complications analyses total organic C (TOC) by wet digestion method acids HPLC due to interference its components. Deionized excluded such analytical but affected turgor cells; roots four widely different cultivars excreted 20 60 % more TOC than...
More than 100 countries pledged to reduce agricultural greenhouse gas (GHG) emissions in the 2015 Paris Agreement of United Nations Framework Convention on Climate Change. Yet technical information about how much mitigation is needed sector vs. feasible remains poor. We identify a preliminary global target for reducing from agriculture ~1 GtCO2 e yr-1 by 2030 limit warming 2100 2 °C above pre-industrial levels. plausible development pathways with cobenefits deliver only 21-40% mitigation....
Open-burning of rice straw residues pollutes the air and contributes to global warming through emissions greenhouse gases (GHGs). Although burning emits large amounts CO2, this component smoke is not considered as net GHG only concludes annual carbon cycle that has started with photosynthesis. Hence, we focused on CH4 N2O from open-field against a baseline incorporation. The experimental approach combined newly designed combustion chamber for collection followed by chemical analysis (Exp. A)...
A biogeochemical model, Denitrification‐Decomposition (DNDC), was modified to enhance its capacity of predicting greenhouse gas (GHG) emissions from paddy rice ecosystems. The major modifications focused on simulations anaerobic biogeochemistry and growth as well parameterization management. new model tested for sensitivities management alternatives variations in natural conditions including weather soil properties. test results indicated that (1) varying practices could substantially affect...
Abstract. The Denitrification and Decomposition (DNDC) model was evaluated for its ability to simulate methane (CH4), nitrous oxide (N2O) carbon dioxide (CO2) emissions from Indian rice fields with various management practices. calibrated validated field experiments in New Delhi, India. observed yield, N uptake greenhouse gas (GHG) were good agreement the values predicted by model. then applied estimation of GHG India using a newly compiled soil/climate/land use database. Continuous flooding...
Global rice agriculture will be increasingly challenged by water scarcity, while at the same time changes in demand (e.g. diets or increasing for biofuels) feed back on agricultural practices. These factors are changing traditional cropping patterns from double-rice to introduction of upland crops dry season. For a comprehensive assessment greenhouse gas (GHG) balances, we measured methane (CH4 )/nitrous oxide (N2 O) emissions and agronomic parameters over 2.5 years (R-R) paddy rotations...
Abstract Rice, with its wide geographic distribution extending from 50° N to 35° S , is expected be the most vulnerable cultivated crop future changing climates. Among different abiotic stresses, extreme temperatures coinciding critical developmental stages, increasingly frequent floods and drought spells, worsening sea water inundation are some of major threats sustainable rice productivity. Following successful implementation molecular marker‐assisted backcrossing introgress large‐effect...
Limited information is available on the dynamics of dissolved organic C (DOC) and its relationship with CH 4 emissions in flooded rice ( Oryza sativa L.) soils as affected by cultivar. Greenhouse laboratory experiments were conducted to determine root release culture solution, DOC concentration soil emission a planted three cultivars. Soil solutions sampled zone (soil surrounding roots) non‐root outside zone). The exudates increased order: IR65598 (new plant type) < IR72 (modern cultivar)...