Bioethanol Potential of Energy Sorghum Grown on Marginal and Arable Lands

Tang, Cuiming; Li, Songbo; Li, Meng; Xie, Guang Hui

doi:10.3389/fpls.2018.00440

Cited by 34 publications

(15 citation statements)

References 42 publications

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“…The average yield of 12. 5 +2.0 −2.3 Mg ha −1 year −1 in the Southern states can produce ethanol yields up to around 2,856-3,920 L ha −1 year -1 (Tang, Li, Li, & Xie, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…The model representation for high‐yielding varieties and the yield response to extreme weather events need to be further improved to better represent new advancements in the genetic engineering. The average yield of

12 . 5_{‐ 2.3}^{+ 2.0}

Mg ha −1 year −1 in the Southern states can produce ethanol yields up to around 2,856–3,920 L ha −1 year ‐1 (Tang, Li, Li, & Xie, 2018).…”

Section: Discussionmentioning

confidence: 99%

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Sorghum biomass production in the continental United States and its potential impacts on soil organic carbon and nitrous oxide emissions

et al. 2020

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National scale projections of bioenergy crop yields and their environmental impacts are essential to identify appropriate locations to place bioenergy crops and ensure sustainable land use strategies. In this study, we used the process‐based Daily Century (DAYCENT) model with site‐specific environmental data to simulate sorghum (Sorghum bicolor L. Moench) biomass yield, soil organic carbon (SOC) change, and nitrous oxide emissions across cultivated lands in the continental United States. The simulated rainfed dry biomass productivity ranged from 0.8 to 19.2 Mg ha−1 year−1, with a spatiotemporal average of 9.7‐2.4+2.1 Mg ha−1 year−1, and a coefficient of variation of 35%. The average SOC sequestration and direct nitrous oxide emission rates were simulated as 0.79‐0.45+0.38 Mg CO2e ha−1 year−1 and 0.38‐0.06+0.04 Mg CO2e ha−1 year−1, respectively. Compared to field‐observed biomass yield data at multiple locations, model predictions of biomass productivity showed a root mean square error (RMSE) of 5.6 Mg ha−1 year−1. In comparison to the multi State (n = 21) NASS database, our results showed RMSE of 5.5 Mg ha−1 year−1. Model projections of baseline SOC showed RMSE of 1.9 kg/m2 in comparison to a recently available continental SOC stock dataset. The model‐predicted N2O emissions are close to 1.25% of N input. Our results suggest 10.2 million ha of cultivated lands in the Southern and Lower Midwestern United States will produce >10 Mg ha−1 year−1 with net carbon sequestration under rainfed conditions. Cultivated lands in Upper Midwestern states including Iowa, Minnesota, Montana, Michigan, and North Dakota showed lower sorghum biomass productivity (average: 6.9 Mg ha−1 year−1) with net sequestration (average: 0.13 Mg CO2e ha−1 year−1). Our national‐scale spatially explicit results are critical inputs for robust life cycle assessment of bioenergy production systems and land use‐based climate change mitigation strategies.

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“…The average yield of 12. 5 +2.0 −2.3 Mg ha −1 year −1 in the Southern states can produce ethanol yields up to around 2,856-3,920 L ha −1 year -1 (Tang, Li, Li, & Xie, 2018).…”

Section: Discussionmentioning

confidence: 99%

12 . 5_{‐ 2.3}^{+ 2.0}

Mg ha −1 year −1 in the Southern states can produce ethanol yields up to around 2,856–3,920 L ha −1 year ‐1 (Tang, Li, Li, & Xie, 2018).…”

Section: Discussionmentioning

confidence: 99%

Sorghum biomass production in the continental United States and its potential impacts on soil organic carbon and nitrous oxide emissions

et al. 2020

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“…Sorghum has been cultivated since the dawn of agriculture and currently occupies an important place in the world grain market due to its wide adaptability, versatility and rusticity. This crop is widely used for animal feed; however, new research indicates its potential to be inserted in power generation in Brazil (Tang, Li, Li, & Xie, ). Individually, some American countries are prominent in sorghum production.…”

Section: Introductionmentioning

confidence: 99%

Phenological and physiological evaluation of first and second cropping periods of sorghum and maize crops

Barbosa

Kuki

Bengala

et al. 2019

J Agronomy Crop Science

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Environmental conditions influence phenology and physiological processes of plants. It is common for maize and sorghum to be sown at two different periods: the first cropping (spring/summer) and the second cropping (autumn/winter). The phenological cycle of these crops varies greatly according to the planting season, and it is necessary to characterize the growth and development to facilitate the selection of the species best adapted to the environment. The aim of this study was to characterize phenological phases and physiological parameters in sorghum and maize plants as a function of environmental conditions from the first cropping and second cropping periods. Two parallel experiments were conducted with both crops. The phenological characterization was based on growth analyses (plant height, leaf area and photoassimilate partitioning) and gas exchange evaluations (net assimilation rate, stomatal conductance, transpiration and water‐use efficiency). It was found that the vegetative stage (VS) for sorghum and maize plants was 7 and 21 days, respectively, longer when cultivated during the second cropping. In the first cropping, the plants were taller than in the second cropping, regardless of the crop. The stomatal conductance of sorghum plants fluctuated in the second cropping during the development period, while maize plants showed decreasing linear behaviour. Water‐use efficiency in sorghum plants was higher during the second cropping compared with the first cropping. In maize plants, in the second cropping, the water‐use efficiency showed a slight variation in relation to the first cropping. It was concluded that the environmental conditions as degree‐days, temperature, photoperiod and pluvial precipitation influence the phenology and physiology of both crops during the first and the second cropping periods, specifically cycle duration, plant height, leaf area, net assimilation rate, stomatal conductance and water‐use efficiency, indicating that both crops respond differentially to environmental changes during the growing season.

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“…Life cycle inventory of 1 ha•yr sorghum at various cultivation stages. 17.4-42.1 ton/ha•yr(Tang et al, 2018). This value was in fact obtained from fertile soil in Gresik.…”

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confidence: 82%

Production of sorghum pellets for electricity generation in Indonesia: A life cycle assessment

et al. 2020

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The current study makes use of life cycle assessment to evaluate the potential greenhouse gas (GHG) savings in coal electricity generation by 5% co-firing with sorghum pellets. The research models the utilization of 100 thousand hectares of under-utilized marginal land in Flores (Indonesia) for biomass sorghum cultivation. Based on equivalent energy content, 1.12 tons of pellets can substitute one ton of coal. The calculated fossil energy ratio of the pellets was 5.8, indicating that the production of pellets for fuel is energetically feasible. Based on a biomass yield of 48 ton/ha•yr, 4.8 million tons of pellets can be produced annually. In comparison with a coal system, the combustion of only pellets to generate 8,300 GWh of electricity can reduce global warming impacts by 7.9 million tons of CO2-eq, which is equivalent to an 85% reduction in GHG emissions. However, these results changed when reduced biomass yield of 24 ton/ha•yr, biomass loss, field emissions, and incomplete combustion were considered in the model. A sensitivity analysis of the above factors showed that the potential GHG savings could decrease from the initially projected 85% to as low as 70%. Overall, the production of sorghum pellets in Flores and their utilization for electricity generation can significantly reduce the reliance on fossil fuels and contribute to climate change mitigation. Some limitations to these conclusions were also discussed herein. The results of this scenario study can assist the Indonesian government in exploring the potential utilization of marginal land for bioenergy development, both in Indonesia and beyond.

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Bioethanol Potential of Energy Sorghum Grown on Marginal and Arable Lands

Cited by 34 publications

References 42 publications

Sorghum biomass production in the continental United States and its potential impacts on soil organic carbon and nitrous oxide emissions

Sorghum biomass production in the continental United States and its potential impacts on soil organic carbon and nitrous oxide emissions

Phenological and physiological evaluation of first and second cropping periods of sorghum and maize crops

Production of sorghum pellets for electricity generation in Indonesia: A life cycle assessment

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