Global Change Biology Bioenergy最新文献

{"title":"Biochar Production From Plastic-Contaminated Biomass","authors":"Isabel Hilber,&nbsp;Nikolas Hagemann,&nbsp;José María de la Rosa,&nbsp;Heike Knicker,&nbsp;Thomas D. Bucheli,&nbsp;Hans-Peter Schmidt","doi":"10.1111/gcbb.70005","DOIUrl":"https://doi.org/10.1111/gcbb.70005","url":null,"abstract":"<p>Anaerobic digestion and composting of biowastes are vital pathways to recycle carbon and nutrients for agriculture. However, plastic contamination of soil amendments and fertilizers made from biowastes is a relevant source of (micro-) plastics in (agricultural) ecosystems. To avoid this contamination, plastic containing biowastes could be pyrolyzed to eliminate the plastic, recycle most of the nutrients, and create carbon sinks when the resulting biochar is applied to soil. Literature suggests plastic elimination mainly by devolatilization at co-pyrolysis temperatures of &gt; 520°C. However, it is uncertain if the presence of plastic during biomass pyrolysis induces the formation of organic contaminants or has any other adverse effects on biochar properties. Here, we produced biochar from wood residues (WR) obtained from sieving of biowaste derived digestate. The plastic content was artificially enriched to 10%, and this mixture was pyrolyzed at 450°C and 600°C. Beech wood (BW) chips and the purified, that is, (macro-) plastic-free WR served as controls. All biochars produced were below limit values of the European Biochar Certificate (EBC) regarding trace element content and organic contaminants. Under study conditions, pyrolysis of biowaste, even when contaminated with plastic, can produce a biochar suitable for agricultural use. However, thermogravimetric and nuclear magnetic resonance spectroscopic analysis of the WR + 10% plastics biochar suggested the presence of plastic residues at pyrolysis temperatures of 450°C. More research is needed to define minimum requirements for the pyrolysis of plastic containing biowaste and to cope with the automated identification and determination of plastic types in biowaste at large scales.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"16 11","pages":""},"PeriodicalIF":5.9,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142443477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Field Assessment of Biochar Interactions With Chemical and Biological N Fertilization in Pointed White Cabbage","authors":"Raúl Castejón-del Pino,&nbsp;María L. Cayuela,&nbsp;María Sánchez-García,&nbsp;Jose A. Siles,&nbsp;Miguel A. Sánchez-Monedero","doi":"10.1111/gcbb.70006","DOIUrl":"https://doi.org/10.1111/gcbb.70006","url":null,"abstract":"<p>The interaction of biochar with mineral fertilization has attracted attention as a strategy to reduce N losses and enhance nitrogen use efficiency. In this study, we investigated the coapplication of biochar with two optimized fertilization strategies based on split urea and a microbial inoculant (<i>Azospirillum brasilense</i>) in a commercial pointed white cabbage crop. Additionally, we evaluated a third optimized N fertilization alternative, a biochar-based fertilizer (BBF) enriched in plant-available N, which was developed from the same biochar. We assessed environmental impacts such as greenhouse gasses (GHG) and NH₃ emissions, yield-scaled N₂O emissions, and global warming potential (GWP). Additionally, we evaluated agronomical outcomes such as crop yield, plant N, and chlorophyll concentration. Moreover, we examined the N-fixing gene's total and relative abundance (<i>nifH</i> and <i>nifH</i>/16S). Biochar and BBF exhibited similar crop yield, GHG, and NH₃ emissions compared to split applications of the synthetic fertilizer. The main difference was associated with the higher soil C sequestration in biochar and BBF treatments that reduced the associated GWP of these fertilization strategies. Finally, biochar favored the activity of the N-fixing bacteria spread, compared to the sole application of bacteria and BBF demonstrated a promoting effect in the soil's total abundance of natural N-fixing bacteria.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"16 11","pages":""},"PeriodicalIF":5.9,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142429590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A critical re-analysis of biochar properties prediction from production parameters and elemental analysis","authors":"Johanne Lebrun Thauront,&nbsp;Gerhard Soja,&nbsp;Hans-Peter Schmidt,&nbsp;Samuel Abiven","doi":"10.1111/gcbb.13170","DOIUrl":"https://doi.org/10.1111/gcbb.13170","url":null,"abstract":"&lt;p&gt;Biochar is the product of intentional pyrolysis of organic feedstocks. It is made under controlled conditions in order to achieve desired physico-chemical characteristics. These characteristics ultimately affect biochar properties as a soil amendment. When biochar is used for carbon storage, an important property is its persistence in soil, often described by the proportion of biochar carbon remaining in soil after a 100 years (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mtext&gt;perm&lt;/mtext&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ {mathrm{F}}_{mathrm{perm}} $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt;). We analyzed published data on 1230 biochars to re-evaluate the effect of pyrolysis parameters on biochar characteristics and the possibility to predict &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mtext&gt;perm&lt;/mtext&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ {mathrm{F}}_{mathrm{perm}} $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; from the maximum temperature reached during pyrolysis (HTT). We showed that biochar ash and nitrogen (N) contents were mostly affected by feedstock type. The oxygen to carbon (O:C) and hydrogen to carbon (H:C) ratios were mostly affected by the extent of pyrolysis (a combination of HTT and pyrolysis duration), except for non (ligno)cellulosic feedstocks (plastic waste, sewage sludge). The volatile matter (VM) content was affected by both feedstock type and the extent of pyrolysis. We demonstrated that HTT is the main driver of H:C -- an indicator of persistence -- but that it is not measured accurately enough to precisely predict H:C, let alone persistence. We examined the equations to estimate &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mtext&gt;perm&lt;/mtext&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ {mathrm{F}}_{mathrm{perm}} $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; available in the literature and showed that &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mtext&gt;perm&lt;/mtext&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$$ {mathrm{F}}_{mathrm{perm}} $$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; calculated from HTT presented little agreement with &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;F&lt;/mi&gt;\u0000 &lt;mtext&gt;perm&lt;/mtext&gt;\u0000 &lt;/msub&gt;\u0000 &lt;/mro","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"16 11","pages":""},"PeriodicalIF":5.9,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.13170","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142429361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Sugarcane Cultivation on C Cycling in Southeastern United States Following Conversion From Grazed Pastures","authors":"Nuria Gomez-Casanovas,&nbsp;Elena Blanc-Betes,&nbsp;Carl J. Bernacchi,&nbsp;Elizabeth H. Boughton,&nbsp;Wendy Yang,&nbsp;Caitlin Moore,&nbsp;Taylor L. Pederson,&nbsp;Amartya Saha,&nbsp;Evan H. DeLucia","doi":"10.1111/gcbb.70003","DOIUrl":"https://doi.org/10.1111/gcbb.70003","url":null,"abstract":"<p>The expansion of sugarcane, a tropical high-yielding feedstock, will likely reshape the Southeastern United States (SE US) bioenergy landscape. However, the sustainability of sugarcane, particularly as it displaces grazed pastures, is highly uncertain. Here, we investigated how pasture conversion to sugarcane in subtropical Florida impacts net ecosystem CO₂ exchange (NEE) and net ecosystem carbon (C) balance (NECB). Measurements were made over three full growth cycles (&gt; 3 years) in sugarcane—plant cane, PC; first ratoon cane, FRC; second ratoon cane, SRC—and in improved (IM) and semi-native (SN) pastures, which make up ca. 37% of agricultural land in the region. Immediately following conversion, PC was a stronger net source of CO₂ than pastures, indicating the importance of CO₂ losses related to land disturbance. Sugarcane, however, shifted to a strong net sink of CO₂ after first regrowth, and overall sugarcane was a stronger net CO₂ sink than pastures. Both stand age and low water availability during cane emergence and tillering substantially decreased its potential gross CO₂ uptake. Accounting for all C gains and removals (i.e., NECB), greater frequency of burn events and repeated harvest increased removals and overall made sugarcane a stronger C source relative to pastures despite substantial C inputs from the previous land use and a stronger CO₂ sink strength. Time since conversion substantially reduced C losses from sugarcane, and the NECB of SRC was similar to that of IM pasture but lower than that of SN pasture, indicating a rapid shift in the NECB of cane. We conclude that the C-balance implications following conversion will depend on the proportion of IM versus SN pastures converted to sugarcane. Furthermore, our findings suggest that no-burn harvest management strategies will be critical to the development of a sustainable bioenergy landscape in SE US.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"16 10","pages":""},"PeriodicalIF":5.9,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142316981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"QTL Mapping of Melampsora Leaf Rust Resistance and Yield Component Traits in the Salix F1 Hybrid Common Parent Population","authors":"Dustin G. Wilkerson,&nbsp;Chase R. Crowell,&nbsp;Christine D. Smart,&nbsp;Lawrence B. Smart","doi":"10.1111/gcbb.70002","DOIUrl":"https://doi.org/10.1111/gcbb.70002","url":null,"abstract":"<p>The first step in trait introgression is to identify and assess novel sources of variation. For shrub willow (<i>Salix</i>) breeders, there is an abundance of understudied species within a genus that readily hybridizes. Breeding targets in shrub willow center on traits contributing to biomass yield for bioenergy. These include stem biomass, insect and pathogen resistance, and leaf architecture traits. More specifically, breeding for durable resistance to willow leaf rust (<i>Melampsora</i> spp.) is of particular importance as the pathogen can significantly reduce biomass yields in commercial production. The <i>Salix</i> F₁ hybrid common parent population (<i>Salix</i> F₁ HCP) was created to characterize the variation among eight species-hybrid families and map QTL for targeted traits. A female and male <i>S. purpurea</i> were used as common parents in crosses made to male <i>S. suchowensis</i>, <i>S. viminalis</i>, <i>S. koriyanagi</i>, and <i>S. udensis</i> and female <i>S. viminalis</i>, <i>S. integra</i>, <i>S. suchowensis</i> to produce eight families that were planted in field trials at Cornell AgriTech in Geneva, NY and phenotyped. Using 16 previously described parental backcross linkage maps and two newly generated <i>S. purpurea</i> consensus maps, we identified 215 QTL across all eight families and in every parent. These included 15 leaf rust severity, 61 herbivory, 65 leaf architecture, and 74 yield component QTL, resulting in 50 unique overlapping regions within the population. These genetic loci serve as an important foundation for future shrub willow breeding, and each interspecific family was identified as a novel source of useful alleles for trait introgression into high yielding cultivars.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"16 10","pages":""},"PeriodicalIF":5.9,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142245046","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sustainable Biofuel Production Utilizing Nanotechnology: Challenges and Potential Solutions","authors":"Fatema Mehejabin,&nbsp;Afla Musharrat,&nbsp;Shams Forruque Ahmed,&nbsp;Zobaidul Kabir,&nbsp;T. M. Yunus Khan,&nbsp;C. Ahamed Saleel","doi":"10.1111/gcbb.70001","DOIUrl":"https://doi.org/10.1111/gcbb.70001","url":null,"abstract":"<p>The transition to biofuels as viable alternatives to fossil fuels is increasingly critical, given the rising demand for sustainable energy. However, biofuel production is hindered by challenges such as feedstock scarcity, elevated production costs, and environmental impacts. Nanotechnology has the potential to significantly improve the efficiency and durability of biofuel production processes, thereby overcoming these challenges. Although there has been significant research on using nanomaterials in biofuel production, there needs to be more emphasis on understanding and addressing the difficulties of integrating these materials and developing strategies to overcome them. This review systematically examines the role of nanotechnology in various biofuel production pathways, including biodiesel, biogas, bioethanol, biohydrogen, hydrotreated vegetable oils, and Fischer–Tropsch synthesis. We discuss how nanomaterials improve key aspects of biofuel production, such as catalysis, microbial conversion, biomass pretreatment, and separation. Despite these advancements, nanotechnology has challenges, including nanoparticle toxicity, increased operational costs, and technical limitations. We propose potential solutions to these issues, emphasizing the need for interdisciplinary collaboration and innovative approaches. By effectively integrating nanotechnology into biofuel production, the energy sector can move toward a more sustainable and environmentally friendly future.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"16 10","pages":""},"PeriodicalIF":5.9,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.70001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142160145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flea beetle (Phyllotreta spp.) management in spring-planted canola (Brassica napus L.) on the northern Great Plains of North America","authors":"Priyanka Mittapelly,&nbsp;Kristen N. Guelly,&nbsp;Altaf Hussain,&nbsp;Héctor A. Cárcamo,&nbsp;Juliana J. Soroka,&nbsp;Meghan A. Vankosky,&nbsp;Dwayne D. Hegedus,&nbsp;James A. Tansey,&nbsp;Alejandro C. Costamagna,&nbsp;John Gavloski,&nbsp;Janet J. Knodel,&nbsp;Boyd A. Mori","doi":"10.1111/gcbb.13178","DOIUrl":"https://doi.org/10.1111/gcbb.13178","url":null,"abstract":"<p>Canola (<i>Brassica napus</i> L. and <i>B. rapa</i> L. [Brassicales: Brassicaceae]) is a major oilseed crop grown globally as a source of vegetable oil, animal feed and biofuel feedstock. The global demand for canola oil as a biofuel feedstock has increased due to recent regulations in the European Union, United States, and Canada. In North America, canola production is centered on the northern Great Plains where it is challenged by two highly destructive flea beetle species, the crucifer (<i>Phyllotreta cruciferae</i> Goeze, 1777) and the striped (<i>Phyllotreta striolata</i> Fabricius, 1803) flea beetles. In the spring, adult <i>P. cruciferae</i> and <i>P. striolata</i> begin feeding on canola seedlings, creating a ‘shot hole’ appearance, which can reduce the plant's photosynthetic capacity leading to uneven plant emergence and growth, reduced plant stand density, and reduced seed yield. Losses resulting from flea beetles are estimated in the tens of millions of dollars annually. At present, the principle means for flea beetle control are insecticides applied as systemic seed treatments and/or subsequent foliar sprays. The continued use of these products is being questioned due to environmental concerns and acquisition of resistance. As such, significant research effort is being directed toward the development of an integrated pest management system for these abundant and hard to manage pests of canola. Here, we review the ecology, pest status, and management of flea beetles in North America and discuss future research needed to promote flea beetle management and sustainable canola production.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"16 9","pages":""},"PeriodicalIF":5.9,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.13178","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142045267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potential for carbon dioxide removal of carbon capture and storage on biomass-fired combined heat and power production","authors":"Gertrud Græsbøll Weimann,&nbsp;Niclas Scott Bentsen","doi":"10.1111/gcbb.13184","DOIUrl":"https://doi.org/10.1111/gcbb.13184","url":null,"abstract":"<p>Carbon Dioxide Removals (CDR) and Carbon Capture and Storage (CCS) have received a lot of attention as a tool to mitigate climate change and reach climate neutrality. Bioenergy with Carbon Capture and Storage (BECCS) is seen as one of the more promising CDRs, and from 2026, the Danish utility Ørsted is establishing the first BECCS plants in Denmark. We present a case study of BECCS by installing CCS at a biomass-fired CHP plant and the aim is to quantify the CDR potential and carbon dynamics of the BECCS system. Moreover, the study aims to quantify the emissions related to capturing and store CO₂. The GHG emissions from CCS including heat, electricity, transport and storage are approximately 100 kgCO₂/t stored CO₂ and the carbon payback time of the BECCS system is 3–4 years relative to leaving the wood in the forest or at processing industries. The main driver of the payback time is the additional use of biomass to operate CCS which shifts the timing of CO₂ emissions more towards the present. The additional biomass use also increases supply chain emissions, and on top of that, only 90% of the direct CO₂ emissions from the CHP plant are captured. The study illustrates the importance of temporal scope in assessing the CDR potential of BECCS. With continuous use of biomass, GHG emissions are 207 kgCO₂/t stored CO₂ in year 1 and −742 kgCO₂/t stored CO₂ in year 99. This study reveals inconsistencies in the assessment of the CDR potential of BECCS in the literature. There is a considerable need for further research within this field to assess how BECCS can contribute to mitigating climate change and on the appropriate scale of BECCS deployment.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"16 9","pages":""},"PeriodicalIF":5.9,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.13184","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142045266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interaction between magnetite and inoculum characteristics in accelerating methane production kinetics","authors":"Ethar M. Al-Essa,&nbsp;Ricardo Bello-Mendoza,&nbsp;David G. Wareham","doi":"10.1111/gcbb.13189","DOIUrl":"https://doi.org/10.1111/gcbb.13189","url":null,"abstract":"<p>Magnetite nanoparticles can boost methane production via direct interspecies electron transfer. However, the combined effect of inoculum and particle characteristics on magnetite's methanogenesis stimulation is poorly understood. Here, the influence of inoculum type, particle size, and particle concentration on the ability of magnetite to accelerate methanogenesis was studied in batch anaerobic digestion experiments. Fresh and degassed mesophilic digester sludge was used as inoculum, representing methanogenic communities in the exponential or stationary growth and endogenous decay phases, respectively. Three magnetite particle size ranges, small (50–150 nm), medium (168–490 nm), and large (800 nm–4.5 μm), at two different concentrations (2 and 7 mM) were used. With degassed sludge, the effect of magnetite on the methane production rate was weak and depended on the particle size and concentration. Only magnetite of medium size at both 2 and 7 mM significantly increased the methane production rate by 12% compared to the control with no magnetite. The lag phase was reduced by 17% compared to the control, only with 2 mM of both small and medium size magnetite. Conversely, adding magnetite into fresh sludge significantly increased the methane production rate by an average of 32% while simultaneously decreasing the lag phase by 15%–40%, as compared to the control, independently of the magnetite's size and concentration. The stimulation of methane production depends on magnetite and inoculum characteristics.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"16 9","pages":""},"PeriodicalIF":5.9,"publicationDate":"2024-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.13189","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141973632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Soil carbon stocks in sugarcane cultivation: An evidence synthesis associated with land use and management practices","authors":"Carlos Roberto Pinheiro Junior,&nbsp;João Luís Nunes Carvalho,&nbsp;Lucas Pecci Canisares,&nbsp;Carlos Eduardo Pellegrino Cerri,&nbsp;Maurício Roberto Cherubin","doi":"10.1111/gcbb.13188","DOIUrl":"https://doi.org/10.1111/gcbb.13188","url":null,"abstract":"<p>Biofuels are essential to ensure the energy transition and mitigating of climate change. However, understanding the impact of land use change (LUC) and management practices on soil organic carbon (SOC) stocks is fundamental to ensuring well-founded policymaking and assessing the sector's carbon footprint. Here, we conducted a meta-analysis (511 pairwise observations) to obtain Brazil's SOC stock change factors (SOC_scf) for LUC and management practices in sugarcane fields. Our results showed that converting native vegetation to sugarcane reduced the SOC stock in all assessed periods. The conversion from annual crops to sugarcane showed a reduction in SOC stock in the first 10 years but with a recovery over time. The conversion of pasture to sugarcane reduced the SOC stock only in the 10–20-year period and had a neutral effect in other periods evaluated. However, our dataset showed high variability in SOC_scf, with many observations indicating an increase in SOC stock, which is related to degraded pastures. We observed that the SOC accumulation rate for each ton of sugarcane straw was affected by the interaction between soil texture and precipitation. Regarding straw management, a low removal rate (&lt; 34%) did not affect the SOC stock, while moderate (34%–66%) and high (&gt; 66%) removal resulted in losses of 5.0% (SOC_scf 0.950) and 9.9% (SOC_scf 0.901), respectively. Our results also showed that reduced tillage and vinasse application increased SOC stocks by 24.0% (SOC_scf 1.24) and 10.0% (SOC_scf 1.10) respectively, proving to be good strategies to support C sequestration in sugarcane fields. Finally, we highlight that our results can contribute to the improvement of public policies and also be used in future life cycle assessment (LCA) and modeling studies, as they provide robust data to establishing regional SOC_scf induced by LUC and management practices, enhancing the reliability of the C footprint assessment of biofuel production.</p>","PeriodicalId":55126,"journal":{"name":"Global Change Biology Bioenergy","volume":"16 9","pages":""},"PeriodicalIF":5.9,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/gcbb.13188","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141966817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}