Yield and quality development comparison between miscanthus and switchgrass over a period of 10 years

Iqbal, Yasir; Gauder, Martin; Claupein, Wilhelm; Graeff‐Hönninger, Simone; Lewandowski, Iris

doi:10.1016/j.energy.2015.05.134

Cited by 75 publications

(43 citation statements)

References 43 publications

(62 reference statements)

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“…Although that of Sin55 was higher in 2017 than 2016, the increase was much lower than expected. It has been observed that yields of miscanthus plantations increase steadily from the establishment year to the 3rd or even 5th year, while the stocks are expanding (Iqbal, Gauder, Claupein, Graeff‐Hönninger, & Lewandowski, ; Lewandowski, Clifton‐Brown, Scurlock, & Huisman, ). For this reason, it is not clear how much the yields in this study were determined by plantation age and how much by early harvest regime.…”

Section: Discussionmentioning

confidence: 99%

Harvest date and leaf:stem ratio determine methane hectare yield of miscanthus biomass

et al. 2018

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The suitability of miscanthus biomass for anaerobic digestion has already been confirmed by several studies. However, it is rarely used as feedstock in biogas plants, mainly due to uncertainty about the optimal harvest regime with regard to the long‐term methane hectare yield and resilience of the crop to green cutting. The recommended green‐cut date for the only commercially available genotype Miscanthus × giganteus (M×g) ranges from September to November. This timeframe is too broad for agricultural practice and needs to be both narrowed down and further specified for different genotypes. The aim of this study was to identify the most suitable harvest window for an autumn green cut of miscanthus, which delivers both a high dry matter and methane yield while securing the long‐term productivity of the crop. A further objective was to quantify the effect of genotypic differences, such as leaf to stem ratio, on the substrate‐specific biogas and methane yield. For these purposes, a field trial with four genotypes (M×g, GNT1, GNT3, Sin55) was conducted over 2 years (2016/2017) and harvested at 2‐week intervals on three dates between mid‐September to mid‐October. Methane hectare yield ranged from 3,183 m³ CH4 ha−1 a−1 (Sin55) to 5,265 m³ CH4 ha−1 a−1 (M×g), which is mainly influenced by dry matter yield. The substrate‐specific methane yield was higher for the leaf (311.0 ml CH4 (g oDM)‐1) than the stem fraction (285.1 ml CH4 (g oDM)‐1) in all genotypes due to lower lignin content of leaves. Of all genotypes, M×g showed the highest and Sin55 the lowest nutrient use efficiency. We conclude that miscanthus in Germany should be harvested in October to maximize methane yields and nutrient recycling and minimize yield reduction. Additionally, to increase methane hectare yields even further, future miscanthus breeding should focus on a higher leaf proportion.

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Section: Discussionmentioning

confidence: 99%

Harvest date and leaf:stem ratio determine methane hectare yield of miscanthus biomass

et al. 2018

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“…In Europe, the highest energy yields are derived in farms dedicated to the production of C4 energy crops, mainly maize and giant miscanthus (Boehmel, Lewandowski, & Claupein, 2008;Jankowski et al, 2016;Muylle et al, 2015). The energy yield of giant miscanthus biomass was determined at 380 GJ ha −1 year −1 in Belgium (Muylle et al, 2015) and at 230-324 GJ ha −1 year −1 in Germany (Boehmel et al, 2008;Iqbal, Gauder, Claupein, Graeff-Hönninger, & Lewandowski, 2015). In central Italy, the energy yield of giant miscanthus grown in a large-area farm over a period of 4-12 years reached 479 GJ/ha on average (Angelini et al, 2009).…”

Section: Energy Outputmentioning

confidence: 99%

Biomass production and energy balance of Miscanthus over a period of 11 years: A case study in a large‐scale farm in Poland

et al. 2019

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Giant miscanthus (Miscanthus × giganteus Greef and Deuter) and Amur silver grass (Miscanthus sacchariflorus Maxim./Hack) are rhizomatous grasses with a C4 photosynthetic pathway that are widely cultivated as energy crops. For those species to be successfully used in bioenergy generation, their yields have to be maintained at a high level in the long term. The biomass yield (fresh and dry matter [DM] yield) and energy efficiency (energy inputs, energy output, energy gain, and energy efficiency ratio) of giant miscanthus and Amur silver grass were compared in a field experiment conducted in 2007–2017 in North‐Eastern Poland. Both species were characterized by high above‐ground biomass yields, and the productive performance of M. × giganteus was higher in comparison with M. sacchariflorus (15.5 vs. 9.3 Mg DM ha−1 year−1 averaged for 1–11 years of growth). In the first year of the experiment, the energy inputs associated with the production of M. × giganteus and M. sacchariflorus were determined at 70.5 and 71.5 GJ/ha, respectively, and rhizomes accounted for around 78%–79% of total energy inputs. In the remaining years of cultivation, the total energy inputs associated with the production of both perennial rhizomatous grasses reached 13.6–15.7 (M. × giganteus) and 16.9–17.5 GJ ha−1 year−1 (M. sacchariflorus). Beginning from the second year of cultivation, mineral fertilizers were the predominant energy inputs in the production of M. × giganteus (78%–86%) and M. sacchariflorus (80%–82%). In years 2–11, the energy gain of M. × giganteus reached 50 (year 2) and 264–350 GJ ha−1 year−1 (years 3–11), and its energy efficiency ratio was determined at 4.7 (year 2) and 18.6–23.3 (years 3–11). The energy gain and the energy efficiency ratio of M. sacchariflorus biomass in the corresponding periods were determined at 87–234 GJ ha−1 year−1 and 6.1–14.3, respectively. Both grasses are significant and environmentally compatible sources of bioenergy, and they can be regarded as potential energy crops for Central‐Eastern Europe.

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“…The commercial energy crop C4-fibre plant Miscanthus × giganteus has great potential for sustainable biomass production in temperate climate, owing to low water requirements, high nutrient efficiency and great yield per unit (Lewandowski, Clifton-Brown, Scurlock, & Huisman, 2000). Both annual and perennial field experiments have demonstrated that M. × giganteus grows well in temperate climate and has a relative high biomass yield without ample N fertilizer addition (Cadoux, Riche, Yates, & Machet, 2012;Heaton, Long, Voigt, Jones, & Clifton-Brown, 2004;Iqbal, Gauder, Claupein, Graeff-Hönninger, & Lewandowski, 2015;Maughan et al, 2012). Even without any external N input by fertilization and despite perennial biomass (and N) removal, M. × giganteus fields maintained substantial biomass productivity (Dohleman, Heaton, Arundale, & Long, 2012;Iqbal et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen‐dependent bacterial community shifts in root, rhizome and rhizosphere of nutrient‐efficient Miscanthus x giganteus from long‐term field trials

Liu

Ludewig

2019

GCB Bioenergy

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The perennial energy crop Miscanthus × giganteus is recognized for its extraordinary nitrogen‐use efficiency. While the remobilization of nitrogen (N) to the rhizome after the growth phase contributes to this efficiency, the plant‐associated microbiome might also contribute, as N‐fixing bacterial species had been isolated from this grass. Here, we studied established Miscanthus × giganteus plots in southern Germany that either received 80 kg N ha−1 a−1 or that were not N‐fertilized for 14 years. The bacterial communities of the bulk soil, rhizosphere, roots and rhizomes were analysed. Major differences were encountered between plant‐associated fractions. Nitrogen had little effect on soil communities. The roots and rhizomes showed less microbial diversity than soil fractions. In these compartments, Actinobacteria and N‐fixing symbiosis‐associated Proteobacteria depended on N. Intriguingly, N2‐fixing‐related bacterial families were enriched in the rhizomes in long‐term zero N plots, while denitrifier‐related families were depleted. These findings point to the rhizome as a potentially interesting plant organ for N fixation and demonstrate long‐term differences in the organ‐specific bacterial communities associated with different N supply, which are mainly shaped by the plant.

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Yield and quality development comparison between miscanthus and switchgrass over a period of 10 years

Cited by 75 publications

References 43 publications

Harvest date and leaf:stem ratio determine methane hectare yield of miscanthus biomass

Harvest date and leaf:stem ratio determine methane hectare yield of miscanthus biomass

Biomass production and energy balance of Miscanthus over a period of 11 years: A case study in a large‐scale farm in Poland

Nitrogen‐dependent bacterial community shifts in root, rhizome and rhizosphere of nutrient‐efficient Miscanthus x giganteus from long‐term field trials

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