Impacts of corn stover removal on carbon dioxide and nitrous oxide emissions

Drury, C. F.; Woodley, Alex L.; Reynolds, W. D.; Yang, Xueming; Phillips, Lori A.; Rehmann, Lars; Calder, Wayne

doi:10.1002/saj2.20104

Cited by 11 publications

(7 citation statements)

References 30 publications

(34 reference statements)

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“…Coefficients with values > |0.3| and that are statistically significant are shown in bold front. The apparent immobilization of IN when high crop residues are present compared to crop removal were also observed in a stover removal field study at 5 residue removal rates (Drury et al, 2020). They found greater nitrate exposure when crop residues were removed which resulted in greater N 2 O emissions compared to the no residue removal treatment.…”

Section: Soil Health Indicatorsmentioning

confidence: 68%

Crop rotation enhances soybean yields and soil health indicators

Agomoh

Drury

Yang

et al. 2021

Soil Science Soc of Amer J

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Including cereal crops in rotations with soybean increases soybean yields and soil health.  Crop rotation increased POMC 73-91% while TC was increased 13-17% relative to continuous soybean.  Compared to continuous soybean, soybean yields were 39-44% greater for 2-yr rotations with corn and wheat.  Compared to continuous soybean, soybean yield was 48-52% greater for 3-yr rotations with corn and wheat and only one year of soybean.  Changes in soil health parameters PMN, POMN, IN, WEOC, POMC, TC and Resp accounted for 34% variability in soybean yield. Financial support for this project from the Agro-Ecosystem Resilience Program (Agriculture and Agri-Food Canada) is gratefully acknowledged. The technical support of John Goerzen,

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Section: Soil Health Indicatorsmentioning

confidence: 68%

Crop rotation enhances soybean yields and soil health indicators

Agomoh

Drury

Yang

et al. 2021

Soil Science Soc of Amer J

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“…% stover removal based on the annual stover yield from CT at the 100% removal rate. Basing removal rates on annual stover yield from one treatment (in this case, CT at 100% removal) accounts for year‐to‐year variation in stover yields (see Drury et al., 2020). Although no stover was re‐applied to the 100% removal treatments, a small amount remained on these plots because of stalks and residues that were not picked up by the baler.…”

Section: Methodsmentioning

confidence: 99%

“…The stover was incorporated into CT soils by the annual fall plowing operation, but left undisturbed on the surface of NT soils. Further detail on experimental design and field methods can be found in Drury et al (2020).…”

Section: Experimental Design and Agronomymentioning

confidence: 99%

Stover harvest and tillage effects on corn seedling emergence

et al. 2021

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Corn (Zea mays L.) stover is an increasingly important feedstock for biofuel and bioproduct production; however, excessive harvest of corn stover from agricultural fields may affect corn seedling emergence and subsequent plant population which may reduce corn growth and yield. Field experiments were conducted over four consecutive growing seasons in southwestern Ontario to determine under continuous corn cropping system the effects of no‐tillage (NT), conventional tillage (CT), and five rates of stover harvest (0, 25, 50, 75, and 100 wt. %) on corn seedling emergence in a Harrow sandy loam and in a Brookston clay loam. Time to achieve 50% seedling emergence (t0.5), emergence rate constant (kG), and final seedling population (MG) were adequately simulated using the Gompertz function. Irrespective of stover removal rate and soil type, t0.5 was 2 d longer, and kG was 32% lower, under NT compared to CT. In Harrow sandy loam, stover removal from NT reduced t0.5 in 1 out of 4 yr. The 100% removal reduced t0.5 relative to 0, 25, 50, and 75% removal by 1.1–2.2 d in 2015. Averaged across both tillages and all removal rates, kG was greater in Harrow sandy loam than in Brookston clay loam. Stover removal rates had no effect on MG but averaged over all removal rates and soil types, MG was 9% lower for NT compared to CT in 2016. No‐tillage practice under corn production can impede seedlings emergence early in the growing season and stover removal from the field can help mitigate against this effect.

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“…Air, Soil and Water Research Drury et al (2021) reported that reducing residue rate increased the cumulative emissions of N 2 O under both conventional and no-tillage systems and the highest emissions were related to the complete removal of residue. They attributed the reduction of N 2 O emissions in residue conservation treatments to N immobilization, which reduced the N required to produce N 2 O.…”

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confidence: 99%

Soil Nitrous Oxide Emissions Following Crop Residues Management in Corn-Wheat Rotation Under Conventional and No-Tillage Systems

Mirzaei

Anari

Taghizadeh‐Toosi

et al. 2022

Air, Soil and Water Research

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Agricultural activity is the major anthropogenic source of nitrous oxide (N2O) emissions from terrestrial ecosystems. Conservation agriculture including crop residue management can play a key role in enhancing soil resilience to climate change and mitigating N2O emissions. We investigated the effects of crop residue rates, including 100 % (R100), 50 % (R50), and residue removal (R0), on N2O emissions in corn-wheat rotation under conventional (CT) and no-tillage (NT) systems. The key factors evaluated affecting N2O emissions included soil temperature, soil moisture, soil ammonium, and soil nitrate concentrations. Results showed that the N2O emissions increased with the increasing rate of residue under both CT and NT systems. Both R100 and R50 significantly ( p < .05) increased the N2O emissions compared to R0 during the annual rotation cycle. Soil moisture and mineral nitrogen (ammonium and nitrate) were the main driving factors that stimulated N2O emission in both CT and NT systems. In the NT and CT systems, cumulative N2O emissions showed a significant increase with R50 (+75.5 % in NT, +36.5 % in CT) and R100 (+134 % in NT, +40 % in CT) as compared to R0. Furthermore, no significant differences were found between R100 and R50 in the CT system, while in the NT system significant increases were observed for R100 compared to R50. Overall, our study justified as a first approach only during the first year that crop residue removal led to decreased N2O emissions under semi-arid conditions. However, due to the deteriorating impact of crop residue removal on crop productivity and soil C sequestration, this management method cannot be considered a sustainable agronomic practice. We suggest long-term studies to determine the appropriate rate of postharvest crop residue to achieve less N2O emissions and climate-friendly agricultural practices.

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Impacts of corn stover removal on carbon dioxide and nitrous oxide emissions

Cited by 11 publications

References 30 publications

Crop rotation enhances soybean yields and soil health indicators

Crop rotation enhances soybean yields and soil health indicators

Stover harvest and tillage effects on corn seedling emergence

Soil Nitrous Oxide Emissions Following Crop Residues Management in Corn-Wheat Rotation Under Conventional and No-Tillage Systems

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