NDLI: Soil Greenhouse Gas Emissions and Carbon Dynamics of a No-Till, Corn-Based Cellulosic Ethanol Production System

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Soil Greenhouse Gas Emissions and Carbon Dynamics of a No-Till, Corn-Based Cellulosic Ethanol Production System

Content Provider	Springer Nature Link
Author	Lehman, R. Michael Osborne, Shann L.
Copyright Year	2016
Abstract	Crop residues like corn (Zea mays L.) stover perform important functions that promote soil health and provide ecosystem services that influence agricultural sustainability and global biogeochemical cycles. We evaluated the effect of corn stover removal from a no-till, corn-soybean (Glycine max (L.) Merr) rotation on soil greenhouse gas (GHG; CO$_{2}$, N$_{2}$O, CH$_{4}$) fluxes, crop yields, and soil organic carbon (SOC) dynamics. We conducted a 4-year study using replicated field plots managed with two levels of corn stover removal (none; 55 % stover removal) for four complete crop cycles prior to initiation of ground surface gas flux measurements. Corn and soybean yields were not affected by stover removal with yields averaging 7.28 Mg ha$^{−1}$ for corn and 2.64 Mg ha$^{−1}$ for soybean. Corn stover removal treatment did not affect soil GHG fluxes from the corn phase; however, the treatment did significantly increase (107 %, P = 0.037) N$_{2}$O fluxes during the soybean phase. The plots were a net source of CH$_{4}$ (∼0.5 kg CH$_{4}$-C ha$^{−1}$ year$^{−1}$ average of all treatments and crops) during the generally wet study duration. Soil organic carbon stocks increased in both treatments during the 4-year study (initiated following 8 years of stover removal), with significantly higher SOC accumulation in the control plots compared to plots with corn stover removal (0–15 cm, P = 0.048). Non-CO$_{2}$ greenhouse gas emissions (945 kg CO$_{2}$-eq ha$^{−1}$ year$^{−1}$) were roughly half of SOC (0–30 cm) gains with corn stover removal (1.841 Mg CO$_{2}$-eq ha$^{−1}$ year$^{−1}$) indicating that no-till practices greatly improve the viability of biennial corn stover harvesting under local soil-climatic conditions. Our results also show that repeated corn stover harvesting may increase N loss (as N$_{2}$O) from fields and thereby contribute to GHG production and loss of potential plant nutrients.
Starting Page	1101
Ending Page	1108
Page Count	8
File Format	PDF
ISSN	19391234
Journal	BioEnergy Research
Volume Number	9
Issue Number	4
e-ISSN	19391242
Language	English
Publisher	Springer US
Publisher Date	2016-05-23
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Corn stover Cellulosic ethanol GRACEnet Greenhouse gases Maize (Zea mays L.) Methane Nitrous oxide No-till Soil organic carbon Soybean (Glycine max (L.) Merr) 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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The Influence of Soil Salinity Gradients on Soybean [Glycine Max (L.) Merr.] and Corn (Zea Mays L.) Growth

Nitrogen transfer from nodulating soybean [Glycine max (L.) Merr.], to corn (Zea mays L.) and non-nodulating soybean in intercrops: direct 15N labelling methods

Evaluation of pyroxasulfone in corn (Zea mays L.) and soybean (Glycine max L. Merr.) weed management programs

Impact of Allelopathic Potential of Maize (zea Mays L.) on Physiology and Growth of Soybean (glycine Max (l.) Merr.)

Molybdenum Foliar Fertilization Improves Photosynthetic Metabolism and Grain Yields of Field-Grown Soybean and Maize

Hydrogen emission from nodulated soybeans [Glycine max (L.) Merr.] and consequences for the productivity of a subsequent maize (Zea mays L.) crop

Interaction of rapeseed (Brassica naphus L) residue management and smother crops for weed control in corn (Zea mays L.) and soybean (Glycine max (L) Merr)

Evaluation of Alachlor Lasso effect on early seedling growth and yield of Maize Zea mays L and Soybean Glycine max L Merrill

Soil Greenhouse Gas Emissions in Response to Corn Stover Removal and Tillage Management Across the US Corn Belt

Soil Greenhouse Gas Emissions and Carbon Dynamics of a No-Till, Corn-Based Cellulosic Ethanol Production System

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Soil Greenhouse Gas Emissions and Carbon Dynamics of a No-Till, Corn-Based Cellulosic Ethanol Production System