Integration of commodity and bioenergy crops
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Transcript of Integration of commodity and bioenergy crops
Integration of Commodity and Bioenergy Crops to Boost Conservation and Environmental Sustainability
Herbert Ssegane and M. Cristina Negri
69th SWCS International Annual ConferenceMaking Waves in ConservationJuly 27-30, 2014 Lombard, IL
[email protected], [email protected] 630-252-7051Work funded by the Bioenergy Technologies Office, US DOE-EERE
Pathways to sustainable expansion of biomass production
Iastate.edu
Bioenergycrops.com
biomassmagazine.com Biochar.org
aquanetviet.org
Use of marginal lands Corn stoverForest residues and
wood chips
Cover crops Algae
Site characterization: Monitoring vs. modeling
OBJECTIVE CRITERIAATTRIBUTE AND
DATA
Soil analysis
Terrain analysis
Hydrogeological analysis
Nutrient leaching
Intra-field crop variability
Site-specific intra-field
assessment for marginal lands
Soil map from soil cores
Longest flow pathso DEM from elevation
point cloud
MODFLOW conceptual modelo Water table elevation
Soil water analyzed for NO3, TOC, TP, and N2O
o Rhizon sampling
Yield map
Soils: Monitoring vs. SSURGO data
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3776
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Contours!. Soil core locations
Field boundaryComfrey loam, 0 - 2 % slopes, frequently floodedSymerton silt loam, 2 - 5 % slopesSymerton silt loam, 5 - 10 % slopes, eroded
±
0 50 10025 Meters
b)a)
DNDC scenario modeling
Scenarioa Yield Leached NO3 N2O flux
Mg ha-1 yr-1 kgN ha-1 yr-1 kgN ha-1 yr-1
Corn 10.4 ± 1.7 31.9 ± 4.4 2.2 ± 0.3
Corn/switchgrass 8.7 ± 1.0 11.6 ± 1.6 2.0 ± 0.2
Corn/willow 9.7 ± 0.6 12.5 ± 1.6 1.9 ± 0.2
% reductionb --- 61.0 ± 6.2 5.5 ± 3.1 --- 59.3 ± 4.0 10.8 ± 2.6