A new carbohydrate retaining variety of Miscanthus increases biogas methane yields compared to <i>M x giganteus</i> and narrows the yield advantage of maize

Kam, Jason; Thomas, David C.; Pierre, Sandra; Ashman, Chris; McCalmont, Jon; Purdy, Sarah

doi:10.1002/fes3.224

Cited by 8 publications

(9 citation statements)

References 62 publications

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“…In the last few years, a considerable amount of research has been devoted on evaluating the perennial grass Miscanthus (Miscanthus spp.) as feedstock for AD in substitution to maize (Kam et al, 2020; Kiesel & Lewandowski, 2017; Mangold et al, 2019; Ruf et al, 2017; Schmidt et al, 2018). Whittaker et al (2016) pointed out that Miscanthus replacing maize is justified by the environmental benefits that may be achieved rather than simply the SMY, and by the type land which is available for it to be grown.…”

Section: Discussionmentioning

confidence: 99%

Biomass and methane yield of giant reed (Arundo donaxL.) as affected by single and double annual harvest

Ceotto

Vasmara²,

Marchetti³

et al. 2021

GCB Bioenergy

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The replacement of silage maize with giant reed as energy crop has been proposed as a mean for reducing the need of irrigation water as well as monetary and environmental costs of cultivation. Little is known about giant reed response to within‐season harvesting, and its effect on the methane production in anaerobic digestion. The effect of three harvest schedules on yield, biomass composition and methane production of giant reed was evaluated at one site of the Po Valley, northern Italy, for three consecutive years. In a completely randomized block design with four replicates the treatments applied annually were: (i) double harvest 1: first cut at the end of June + second cut at the beginning of October (DH1); (ii) double harvest 2: first cut at the end of July + second cut at the beginning of October (DH2); (iii) single harvest at the beginning of October (SH). The crop stand was established in the year 2015 and treatments were repeatedly applied in the years 2016, 2017 and 2018. The SH treatment determined the highest average annual dry matter (DM) yield (59.0 Mg DM ha−1). The DM yield for treatments with double harvest was significantly lower, that is, −30% for DH1 and −15% for DH2. In terms of specific methane yield there was little advantage in harvesting biomass twice during the growing season. The average specific methane yield varied substantially between years (i.e. from 144 to 233 ml CH4 g−1 VS), and in every year the values tended to decrease with the ageing of harvested biomass. Methane yield per hectare, however, was driven by DM yield, thus SH also determined the highest average value (9110 m3 CH4‐STP ha−1). In conclusion, the single annual harvest at the end of the growing season is an ideal strategy for maximizing methane production from giant reed.

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Section: Discussionmentioning

confidence: 99%

Biomass and methane yield of giant reed (Arundo donaxL.) as affected by single and double annual harvest

Ceotto

Vasmara²,

Marchetti³

et al. 2021

GCB Bioenergy

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“…cultivated at the same location has not yet been reported. Furthermore, most of the reports only selected an early harvest sample and a late harvest sample to compare the sugar composition [12][13][14]. As a consequence, the sugar and mineral composition profile of the plant during the harvest is not clear.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Bioethanol Production Potential of Miscanthus Cultivars

et al. 2021

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Miscanthus is a fast-growing perennial grass that attracts significant attention for its potential application as a feedstock for bioethanol production. This report explores the difference in the lignocellulosic composition of various Miscanthus cultivars, including Miscanthus × giganteus cultivated at the same location (mainly Lincoln, UK). It also assesses the sugar release profiles and mineral composition profiles of five Miscanthus cultivars harvested over a growing period from November 2018 to February 2019. The results showed that Miscanthus × giganteus contains approximately 45.5% cellulose, 29.2% hemicellulose and 23.8% lignin (dry weight, w/w). Other cultivars of Miscanthus also contain high quantities of carbohydrates (cellulose 41.1–46.0%, hemicellulose 24.3–32.6% and lignin 21.4–24.9%). Pre-treatment of Miscanthus using dilute acid followed by enzymatic hydrolysis released 63.7–80.2% of the theoretical glucose content. Fermentation of a hydrolysate of Miscanthus × giganteus using Saccharomyces cerevisiae NCYC2592 produced 13.58 ± 1.11 g/L of ethanol from 35.13 ± 0.46 g/L of glucose, corresponding to a yield of 0.148 g/g dry weight Miscanthus biomass. Scanning electron microscopy was used to study the morphology of raw and hydrolysed Miscanthus samples, which provided visual proof of Miscanthus lignocellulose degradation in these processes. The sugar release profile showed that a consequence of Miscanthus plant growth is an increase in difficulty in releasing monosaccharides from the biomass. The potassium, magnesium, sodium, sulphur and phosphorus contents in various Miscanthus cultivars were analysed. The results revealed that these elements were slowly lost from the plants during the latter part of the growing season, for a specific cultivar, until February 2019.

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“…It is also naturally adapted to a wide range of climate zones and land types [3,4]. Currently, Miscanthus is mainly used for combustion, but there is keen interest in its development as a sustainable substrate for bioethanol or biomethane production [5,6].…”

Section: Introductionmentioning

confidence: 99%

Differential expression of starch and sucrose metabolic genes linked to varying biomass yield in Miscanthus hybrids

Vega

Peel

Purdy

et al. 2020

Preprint

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BACKGROUND:Miscanthus is a commercial lignocellulosic biomass crop owing to its high biomass productivity and low chemical input requirements. Interspecific Miscanthus hybrids with high biomass yield were shown to have low concentrations of starch and sucrose but high concentrations of fructose. We performed a transcriptional RNA-seq analysis between selected Miscanthus hybrids with contrasting values for these phenotypes to clarify how these phenotypes are genetically controlled. RESULTS:We observed that genes directly involved in the synthesis and degradation of starch and sucrose were down-regulated in high yielding Miscanthus hybrids. At the same time, glycolysis and export of triose phosphates were up-regulated in high yielding Miscanthus hybrids. CONCLUSIONS:Our results evidence a direct relationship between high expression of essential enzymatic genes in the starch and sucrose pathways, high starch concentrations, and lower biomass production. The strong interconnectivity between genotype, chemotype and agronomic traits opens the door to use the expression of well-characterised genes in the starch and sucrose pathway for the early selection of high biomass yielding genotypes from large Miscanthus populations.

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A new carbohydrate retaining variety of Miscanthus increases biogas methane yields compared to M x giganteus and narrows the yield advantage of maize

Cited by 8 publications

References 62 publications

Biomass and methane yield of giant reed (Arundo donaxL.) as affected by single and double annual harvest

Biomass and methane yield of giant reed (Arundo donaxL.) as affected by single and double annual harvest

Exploring the Bioethanol Production Potential of Miscanthus Cultivars

Differential expression of starch and sucrose metabolic genes linked to varying biomass yield in Miscanthus hybrids

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