NDLI: Assessing the Soil Carbon, Biomass Production, and Nitrous Oxide Emission Impact of Corn Stover Management for Bioenergy Feedstock Production Using DAYCENT

Content Provider	Springer Nature Link
Author	Campbell, Elear E. Johnson, Jane M. F. Jin, Virginia L. Lehman, R. Michael Osborne, Shann L. Varvel, Gary E. Paustian, Keith
Copyright Year	2014
Abstract	Harvesting crop residue needs to be managed to protect agroecosystem health and productivity. DAYCENT, a process-based modeling tool, may be suited to accommodate region-specific factors and provide regional predictions for a broad array of agroecosystem impacts associated with corn stover harvest. Grain yield, soil C, and N$_{2}$O emission data collected at Corn Stover Regional Partnership experimental sites were used to test DAYCENT performance modeling the impacts of corn stover removal. DAYCENT estimations of stover yields were correlated and reasonably accurate (adjusted r $^{2}$ = 0.53, slope = 1.18, p << 0.001, intercept = 0.36, p = 0.11). Measured and simulated average grain yields across sites did not differ as a function of residue removal, but the model tended to underestimate average measured grain yields. Modeled and measured soil organic carbon (SOC) change for all sites were correlated (adjusted r $^{2}$ = 0.54, p << 0.001), but DAYCENT overestimated SOC loss with conventional tillage. Simulated and measured SOC change did not vary by residue removal rate. DAYCENT simulated annual N$_{2}$O flux more accurately at low rates (≤2-kg N$_{2}$O-N ha$^{−1}$ year$^{−1}$) but underestimated when emission rates were >3-kg N$_{2}$O-N ha$^{−1}$ year$^{−1}$. Overall, DAYCENT performed well at simulating stover yields and low N$_{2}$O emission rates, reasonably well when simulating the effects of management practices on average grain yields and SOC change, and poorly when estimating high N$_{2}$O emissions. These biases should be considered when DAYCENT is used as a decision support tool for recommending sustainable corn stover removal practices to advance bioenergy industry based on corn stover feedstock material.
Starting Page	491
Ending Page	502
Page Count	12
File Format	PDF
ISSN	19391234
Journal	BioEnergy Research
Volume Number	7
Issue Number	2
e-ISSN	19391242
Language	English
Publisher	Springer US
Publisher Date	2014-02-04
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	DAYCENT Soil carbon change Corn stover Bioenergy N$_{2}$O emissions Plant Sciences Plant Genetics & Genomics Plant Breeding/Biotechnology Plant Ecology Wood Science & Technology
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment Agronomy and Crop Science

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