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Author
Kraus, D.
;
Weller, S.
;
Klatt, S.
;
Haas, E.
;
Wassmann, R.
;
Kiese, R.
;
Butterbach-Bahl, K.
Title
A new LandscapeDNDC biogeochemical module to predict CH4 and N2O emissions from lowland rice and upland cropping systems
Type
Journal Article
Year
2015
Publication
Plant and Soil
Abbreviated Journal
Plant Soil
Volume
386
Issue
1-2
Pages
125-149
Keywords
methane
;
nitrous oxide
;
paddy rice
;
maize
;
model
;
nitrous-oxide emissions
;
process-based model
;
methane transport capacity
;
process-oriented model
;
pnet-n-dndc
;
forest soils
;
paddy soils
;
sensitivity-analysis
;
residue management
;
organic-matter
Abstract
Replacing paddy rice by upland systems such as maize cultivation is an on-going trend in SE Asia caused by increasing water scarcity and higher demand for meat. How such land management changes will feedback on soil C and N cycles and soil greenhouse gas emissions is not well understood at present. A new LandscapeDNDC biogeochemical module was developed that allows the effect of land management changes on soil C and N cycle to be simulated. The new module is applied in combination with further modules simulating microclimate and crop growth and evaluated against observations from field experiments. The model simulations agree well with observed dynamics of CH (4) emissions in paddy rice depending on changes in climatic conditions and agricultural management. Magnitude and peak emission periods of N (2) O from maize cultivation are simulated correctly, though there are still deficits in reproducing day-to-day dynamics. These shortcomings are most likely related to simulated soil hydrology and may only be resolved if LandscapeDNDC is coupled to more complex hydrological models. LandscapeDNDC allows for simulation of changing land management practices in SE Asia. The possibility to couple LandscapeDNDC to more complex hydrological models is a feature needed to better understand related effects on soil-atmosphere-hydrosphere interactions.
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
English
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0032-079x
ISBN
Medium
Article
Area
Expedition
Conference
Notes
CropM, ft_macsur
Approved
no
Call Number
MA @ admin @
Serial
4530
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