Soil carbon stocks and water stable aggregates under annual and perennial biofuel crops in central Ohio

Dheri, G. S.; Lal, Rattan; Moonilall, Nall I.

doi:10.1016/j.agee.2021.107715

Cited by 20 publications

(8 citation statements)

References 78 publications

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“…According to Liebig et al (2008), switchgrass decreases SOC at two of ten experimental sites due to a significant decrease in soil bulk density near the surface depth, which contributes to decreased SOC, whereas switchgrass increases SOC at the remaining experimental sites. Dheri et al (2022) show that switchgrass grown in Ohio could increase SOC in the 0-20 cm depth by 8.22 Mg C ha −1 within the first 8 years of their study. Switchgrass production on marginally productive croplands can also increase SOC by 0.9-1.3 Mg C ha −1 year −1 for 0-30 cm depth and over 2 Mg C ha −1 year −1 for the 0-150 cm depth (Follett et al, 2012;Jin et al, 2019).…”

Section: Introductionmentioning

confidence: 91%

“…Soil organic carbon increase by switchgrass ranges from −0.6 to 4.3 Mg C ha −1 year −1 , depending on climate, soil properties, land use history and so on (Agostini et al, 2015; Dheri et al, 2022; Follett et al, 2012; Jin et al, 2019; Lee et al, 2007; Lemus & Lal, 2005; Liebig et al, 2008; Slessarev et al, 2020; Valdez et al, 2017). According to Liebig et al (2008), switchgrass decreases SOC at two of ten experimental sites due to a significant decrease in soil bulk density near the surface depth, which contributes to decreased SOC, whereas switchgrass increases SOC at the remaining experimental sites.…”

Section: Introductionmentioning

confidence: 99%

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Global warming intensity of biofuel derived from switchgrass grown on marginal land in Michigan

et al. 2023

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Energy crops for biofuel production, especially switchgrass (Panicum virgatum), are of interest from a climate change perspective. Here, we use outputs from a crop growth model and life cycle assessment (LCA) to examine the global warming intensity (GWI; g CO2 MJ−1) and greenhouse gas (GHG) mitigation potential (Mg CO2 year−1) of biofuel systems based on a spatially explicit analysis of switchgrass grown on marginal land (abandoned former cropland) in Michigan, USA. We find that marginal lands in Michigan can annually produce over 0.57 hm3 of liquid biofuel derived from nitrogen‐fertilized switchgrass, mitigating 1.2–1.5 Tg of CO2 year−1. About 96% of these biofuels can meet the Renewable Fuel Standard (60% reduction in lifecycle GHG emissions compared with conventional gasoline; GWI ≤37.2 g CO2 MJ−1). Furthermore, 73%–75% of these biofuels are carbon‐negative (GWI less than zero) due to enhanced soil organic carbon (SOC) sequestration. However, simulations indicate that SOC levels would fail to increase and even decrease on the 11% of lands where SOC stocks >>200 Mg C ha−1, leading to carbon intensities greater than gasoline. Results highlight the strong climate mitigation potential of switchgrass grown on marginal lands as well as the needs to avoid carbon rich soils such as histosols and wetlands and to ensure that productivity will be sufficient to provide net mitigation.

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Global warming intensity of biofuel derived from switchgrass grown on marginal land in Michigan

et al. 2023

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“…Zan et al (2001) demonstrated that SOC was not different between SG and corn after 3 years, but was 45% greater under SG than corn at 0-15 cm and 28% greater at 15-30 cm after 10 years in eastern Canada. Dheri et al (2022) showed that SG increased SOC at 0-20 cm by 7.94 Mg C ha −1 compared to a loss of 8.25 Mg C ha −1 under annual crops after 10 years in Ohio. In contrast, Chaterjee et al (2018) did not observe significant difference in SOC between SG and winter wheat after 6 years in eastern North Dakota.…”

Section: Core Ideasmentioning

confidence: 97%

Soil total carbon and nitrogen under long‐term perennial bioenergy crops receiving various nitrogen fertilization rates

2023

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Perennial crops may sequester greater soil carbon (C) and nitrogen (N) than annual crops due to higher root biomass production, but the potential of long‐term cultivation of perennial bioenergy crops receiving various N fertilization rates in sequestering C and N needs further exploration. Soil samples (0–120 cm) collected from 2009 to 2019 under perennial bioenergy crops receiving various N fertilization rates and an annual crop were analyzed for soil total C (STC) and N (STN) in the US northern Great Plains. Perennial bioenergy crops were intermediate wheatgrass (IW, Thinopyrum intermedium [Host] Barkworth and Dewey), smooth bromegrass (SB, Bromus inermis L.), and switchgrass (SG, Panicum virgatum L.); N fertilization rates were 0, 28, 56, and 84 kg N ha−1, and annual crop was spring wheat (WH, Triticum aestivum, L.). The STC increased, but STN decreased by soil depth, regardless of treatments and years. At 0–120 cm, IW sequestered C at 10.6 Mg C ha−1 year−1 compared with 5.4–6.8 Mg C ha−1 year−1 for SB and SG from 2009 to 2019. Nitrogen fertilization rate had limited effect on STC and STN. At 0–30 cm, STC was 2.0–5.4 Mg C ha−1 greater and STN 0.10–0.24 Mg N ha−1 greater with perennial bioenergy crops than WH. Long‐term cultivation of IW can sequester more C in the soil to a greater depth than SB and SG and perennial bioenergy crops can sequester more C and N at the surface layer than an annual crop in the semiarid region of the US northern Great Plains.

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“…Although planting long-lived perennial plants on degraded agricultural soils would be one of the most effective ways to rapidly restore soil carbon levels, this approach is limited because the herbaceous perennials currently available for use in agriculture (mainly forage crops) produce biomass that is unsuitable for direct human consumption ( Paustian et al, 2016a ). Therefore, efforts are underway to develop new crop plants that would have extensive long-lived root systems and would achieve carbon sequestration levels similar to perennial biofuels ( Crews and Rumsey, 2017 ; Dheri et al, 2022 ) while simultaneously producing abundant human-edible protein, starch, and oils through mechanically harvestable grain ( Glover et al, 2010 ).…”

Section: How Can More Carbon Be Retained In Soil and Biomass?mentioning

confidence: 99%

Climate change challenges, plant science solutions

et al. 2022

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Climate change is a defining challenge of the 21st century, and this decade is a critical time for action to mitigate the worst effects on human populations and ecosystems. Plant science can play an important role in developing crops with enhanced resilience to harsh conditions (e.g., heat, drought, salt stress, flooding, disease outbreaks) and engineering efficient carbon-capturing and carbon-sequestering plants. Here, we present examples of research being conducted in these areas and discuss challenges and open questions as a call to action for the plant science community.

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Soil carbon stocks and water stable aggregates under annual and perennial biofuel crops in central Ohio

Cited by 20 publications

References 78 publications

Global warming intensity of biofuel derived from switchgrass grown on marginal land in Michigan

Global warming intensity of biofuel derived from switchgrass grown on marginal land in Michigan

Soil total carbon and nitrogen under long‐term perennial bioenergy crops receiving various nitrogen fertilization rates

Climate change challenges, plant science solutions

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