The Experts below are selected from a list of 26091 Experts worldwide ranked by ideXlab platform
Dong Jiang - One of the best experts on this subject based on the ideXlab platform.
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spatiotemporal assessment of farm gate production costs and economic potential of miscanthus giganteus panicum virgatum l and jatropha grown on Marginal Land in china
Gcb Bioenergy, 2020Co-Authors: Bingquan Zhang, Dong Jiang, Astley Hastings, John Cliftonbrown, André FaaijAbstract:Spatially explicit farm-gate production costs and the economic potential of three types of energy crops grown on available Marginal Land in China for 2017 and 2040 were investigated using a spatial accounting method and construction of cost-supply curves. The average farm-gate cost from all available Marginal Land was calculated as 32.9 CNY/GJ for Miscanthus Mode, 27.5 CNY/GJ for Switchgrass Mode, 32.4 CNY/GJ for Miscanthus & Switchgrass Mode, and 909 CNY/GJ for Jatropha Mode in 2017. The costs of Miscanthus and switchgrass were predicted to decrease by approximately 11%-15%, whereas the cost of Jatropha was expected to increase by 5% in 2040. The cost of Jatropha varies significantly from 193 to 9,477 CNY/GJ across regions because of the huge differences in yield across regions. The economic potential of the Marginal Land was calculated as 28.7 EJ/year at a cost of less than 25 CNY/GJ for Miscanthus Mode, 4.0 EJ/year at a cost of less than 30 CNY/GJ for Switchgrass Mode, 29.6 EJ/year at a cost of less than 25 CNY/GJ for Miscanthus & Switchgrass Mode, and 0.1 EJ/year at a cost of less than 500 CNY/GJ for Jatropha Mode in 2017. It is not feasible to develop Jatropha production on Marginal Land based on existing technologies, given its high production costs. Therefore, the Miscanthus & Switchgrass Mode is the most economical way, because it achieves the highest economic potential compared with other modes. The sensitivity analysis showed that the farm-gate costs of Miscanthus and switchgrass are most sensitive to uncertainties associated with yield reduction and harvesting costs, while, for Jatropha, the unpredictable yield has the greatest impact on its farm-gate cost. This study can help policymakers and industrial stakeholders make strategic and tactical bioenergy development plans in China (exchange rate in 2017: 1€ = 7.63￥; all the joules in this paper are higher heat value).
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modeled spatial assessment of biomass productivity and technical potential of miscanthus giganteus panicum virgatum l and jatropha on Marginal Land in china
Gcb Bioenergy, 2020Co-Authors: Bingquan Zhang, Dong Jiang, Astley Hastings, John Cliftonbrown, André FaaijAbstract:This article identifies Marginal Land technically available for the production of energy crops in China, compares three models of yield prediction for Miscanthus × giganteus, Panicum virgatum L. (switchgrass), and Jatropha, and estimates their spatially specific yields and technical potential for 2017. Geographic Information System (GIS) analysis of Land use maps estimated that 185 Mha of Marginal Land was technically available for energy crops in China without using areas currently used for food production. Modeled yields were projected for Miscanthus × giganteus, a GIS‐based Environmental Policy Integrated Climate model for switchgrass and Global Agro‐Ecological Zone model for Jatropha. GIS analysis and MiscanFor estimated more than 120 Mha Marginal Land was technically available for Miscanthus with a total potential of 1,761 dry weight metric million tonne (DW Mt)/year. A total of 284 DW Mt/year of switchgrass could be obtained from 30 Mha Marginal Land, with an average yield of 9.5 DW t ha−1 year−1. More than 35 Mha Marginal Land was technically available for Jatropha, delivering 9.7 Mt/year of Jatropha seed. The total technical potential from available Marginal Land was calculated as 31.7 EJ/year for Miscanthus, 5.1 EJ/year for switchgrass, and 0.13 EJ/year for Jatropha. A total technical bioenergy potential of 34.4 EJ/year was calculated by identifying best suited crop for each 1 km2 grid cell based on the highest energy value among the three crops. The results indicate that the technical potential per hectare of Jatropha is unable to compete with that of the other two crops in each grid cell. This modeling study provides planners with spatial overviews that demonstrate the potential of these crops and where biomass production could be potentially distributed in China which needs field trials to test model assumptions and build experience necessary to translate into practicality.
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potential bioethanol production from sweet sorghum on Marginal Land in china
Journal of Cleaner Production, 2019Co-Authors: Dong Jiang, Mengmeng Hao, Kun Liu, Xiaoxi YanAbstract:Abstract Sweet sorghum is one of the best renewable non-grain energy crops for ethanol production due to its high sugar content, short growing period and good tolerance to natural conditions. However, insufficient studies have been conducted on the spatial distribution of sweet sorghum-based bioethanol production potential. This study presents a method, i.e., a Land surface process model (Environmental Policy Integrated Climate GIS-based (GEPIC) model) coupled with a life cycle analysis (LCA), to simulate the spatial distribution of potential bioethanol production, energy efficiency and environmental impacts throughout the whole life cycle of sweet sorghum-based ethanol. The results showed that approximately 49.65 million ha of Marginal Land in China were suitable for sweet sorghum planting, and more than 13.57 million tons of sweet sorghum could be yielded. Based on sweet sorghum, 847.81 thousand tons of ethanol could be produced. A potential net energy gain of 115 billion MJ which is equivalent to 2.38 million tons of 90-octane gasoline would be achieved if all Marginal Lands could be used. The results of the environmental impact assessment showed that the total environmental effect index was 0.25 million (population equivalents). The global warming potential was the most significant environmental impact category. Guizhou Province can be given priority for sweet sorghum-based bioethanol development in China.
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potential Marginal Land resources of cassava worldwide a data driven analysis
Renewable & Sustainable Energy Reviews, 2019Co-Authors: Dong Jiang, Qian Wang, Fangyu Ding, Mengmeng HaoAbstract:Abstract Quantitatively evaluating the potential Marginal Lands for cassava (Manihot esculenta Crantz) in previous studies has mostly been conducted at regional and national scales. However, at present, there is no reliable cassava Marginal Land assessment data on the global scale. By explicitly incorporating known samples with multicovariates, a boosted regression tree (BRT) modeling procedure was used to generate the first global potential Marginal Land distribution map of cassava with a 5 × 5 km spatial resolution grid. The total amount of potential Marginal Land resources suitable for cassava is approximately 1696.28 million hectares, mainly distributed across Central Africa, South America, Southeast Asia and North America. The estimated map reveals that the ecological zones suitable for cassava lie between the 30° parallels and are even distributed at higher latitudes. Validation statistics indicate that the fitted BRT models obtain high performance with a tenfold cross-validation area under the curve (AUC) value of 0.962 [95% confidence interval (CI) 0.957–0.967]. The investigated patterns show that the relative contribution of Land cover is 46.47% [95% CI 43.46–49.49%], followed by annual cumulative precipitation (35.96% [95% CI 33.29–38.62%]), minimum annual temperature (10.23% [95% CI 9.61–10.85%]), mean solar radiation (3.13% [95% CI 2.77–3.49%]) and maximum annual temperature (2.31% [95% CI 2.15–2.47%]). The results provide a baseline for understanding the potential distribution of Marginal Land resources viable for cassava worldwide.
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spatial temporal variation of Marginal Land suitable for energy plants from 1990 to 2010 in china
Scientific Reports, 2015Co-Authors: Dong Jiang, Dafang Zhuang, Mengmeng Hao, Yaohuan HuangAbstract:Energy plants are the main source of bioenergy which will play an increasingly important role in future energy supplies. With limited cultivated Land resources in China, the development of energy plants may primarily rely on the Marginal Land. In this study, based on the Land use data from 1990 to 2010(every 5 years is a period) and other auxiliary data, the distribution of Marginal Land suitable for energy plants was determined using multi-factors integrated assessment method. The variation of Land use type and spatial distribution of Marginal Land suitable for energy plants of different decades were analyzed. The results indicate that the total amount of Marginal Land suitable for energy plants decreased from 136.501 million ha to 114.225 million ha from 1990 to 2010. The reduced Land use types are primarily shrub Land, sparse forest Land, moderate dense grassLand and sparse grassLand, and large variation areas are located in Guangxi, Tibet, Heilongjiang, Xinjiang and Inner Mongolia. The results of this study will provide more effective data reference and decision making support for the long-term planning of bioenergy resources.
Shu Geng - One of the best experts on this subject based on the ideXlab platform.
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potential energy production from algae on Marginal Land in china
Bioresource Technology, 2012Co-Authors: Qingtao Zhang, Shu Geng, Guoyu Qiu, E Hasi, Guangyi WangAbstract:This study is aimed to systematically estimate Marginal Land resources with different grades (total area; Land with certain eco-environmental-economic feasibility; centralized reserve Land) in China, and evaluate potential energy production from microalgae on Marginal Lands in the long-, mid- and near-term, based on a model. The annual potential energy production from algae in total Marginal Land of China (APEMC) was estimated to 4.19 billion standard coal equivalent (tce), far more than total annual energy consumption equivalent in China (TECCE) in 2007. For microalgae with 35% lipid content, the APEMC in the mid-term would be 37.6-65.8% of the TECCE in 2007. The corresponding annual CO(2) emission mitigation by replacement of fossil fuels by algal bioenergy would be 4.27-7.44 billiont. Although Southwest China provides the highest potential algae production in the long-term, Northwest China provides the highest value in the near-term.
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Marginal Land based biomass energy production in china
Journal of Integrative Plant Biology, 2010Co-Authors: Ya Tang, Jiasui Xie, Shu GengAbstract:Fast economic development in China has resulted in a significant increase in energy demand. Coal accounts for 70% of China's primary energy consumption and its combustion has caused many environmental and health problems. Energy security and environmental protection requirements are the main drivers for renewable energy development in China. Small farmLand and food security make bioenergy derived from corn or sugarcane unacceptable to China: the focus should be on generating bioenergy from ligno-cellulosic feedstock sources. As China cannot afford biomass energy production from its cropLands, Marginal Lands may play an important role in biomass energy production. Although on a small scale, Marginal Land has already been used for various purposes. It is estimated that some 45 million hm2 of Marginal Land could be brought into high potential biomass energy production. For the success of such an initiative, it will likely be necessary to develop multipurpose plants. A case study, carried out on Marginal Land in Ningnan County, Sichuan Province with per capita cropLand of 0.07 ha, indicated that some 380 000 tons of dry biomass could be produced each year from annual pruning of mulberry trees. This study supports the feasibility of producing large quantities of biomass from Marginal Land sources.
Amrita Bhattacharyya - One of the best experts on this subject based on the ideXlab platform.
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conversion of Marginal Land into switchgrass conditionally accrues soil carbon but reduces methane consumption
The ISME Journal, 2021Co-Authors: Colin T Bates, Arthur Escalas, Jialiang Kuang, Lauren Hale, Yuan Wang, Don Herman, Erin E Nuccio, Xiaoling Wan, Amrita BhattacharyyaAbstract:Switchgrass is a deep-rooted perennial native to the US prairies and an attractive feedstock for bioenergy production; when cultivated on Marginal soils it can provide a potential mechanism to sequester and accumulate soil carbon (C). However, the impacts of switchgrass establishment on soil biotic/abiotic properties are poorly understood. Additionally, few studies have reported the effects of switchgrass cultivation on Marginal Lands that have low soil nutrient quality (N/P) or in areas that have experienced high rates of soil erosion. Here, we report a comparative analyses of soil greenhouse gases (GHG), soil chemistry, and microbial communities in two contrasting soil types (with or without switchgrass) over 17 months (1428 soil samples). These soils are highly eroded, 'Dust Bowl' remnant field sites in southern Oklahoma, USA. Our results revealed that soil C significantly increased at the sandy-loam (SL) site, but not at the clay-loam (CL) site. Significantly higher CO2 flux was observed from the CL switchgrass site, along with reduced microbial diversity (both alpha and beta). Strikingly, methane (CH4) consumption was significantly reduced by an estimated 39 and 47% at the SL and CL switchgrass sites, respectively. Together, our results suggest that soil C stocks and GHG fluxes are distinctly different at highly degraded sites when switchgrass has been cultivated, implying that carbon balance considerations should be accounted for to fully evaluate the sustainability of deep-rooted perennial grass cultivation in Marginal Lands.
Yaohuan Huang - One of the best experts on this subject based on the ideXlab platform.
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spatial temporal variation of Marginal Land suitable for energy plants from 1990 to 2010 in china
Scientific Reports, 2015Co-Authors: Dong Jiang, Dafang Zhuang, Mengmeng Hao, Yaohuan HuangAbstract:Energy plants are the main source of bioenergy which will play an increasingly important role in future energy supplies. With limited cultivated Land resources in China, the development of energy plants may primarily rely on the Marginal Land. In this study, based on the Land use data from 1990 to 2010(every 5 years is a period) and other auxiliary data, the distribution of Marginal Land suitable for energy plants was determined using multi-factors integrated assessment method. The variation of Land use type and spatial distribution of Marginal Land suitable for energy plants of different decades were analyzed. The results indicate that the total amount of Marginal Land suitable for energy plants decreased from 136.501 million ha to 114.225 million ha from 1990 to 2010. The reduced Land use types are primarily shrub Land, sparse forest Land, moderate dense grassLand and sparse grassLand, and large variation areas are located in Guangxi, Tibet, Heilongjiang, Xinjiang and Inner Mongolia. The results of this study will provide more effective data reference and decision making support for the long-term planning of bioenergy resources.
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evaluating the bioenergy potential of cassava on Marginal Land using a biogeochemical process model in guangxi china
Journal of Applied Remote Sensing, 2015Co-Authors: Dong Jiang, Jingying Fu, Yaohuan HuangAbstract:Bioenergy is expected to play an important role in future energy systems. Cassava is believed to be one of the most promising energy plants for fuel ethanol production in the tropics and subtropics. In China, plant-based bioenergy has to be developed on Marginal Land to avoid impacting food security. Cassava yield varies dramatically under different environmental conditions. Therefore, an efficient approach is needed to estimate cassava yield on Marginal Land. This paper presents a method for assessing the energy potential of cassava using a biogeochemical process model. First, the spatial distribution of Marginal Land was identified. A geographic information system-based biogeochemical process model, the GIS-based environmental policy integrated climate model, was used to simulate the spatial and temporal dynamics of the major processes of the soil-cassava-atmosphere management system. The model was calibrated and successfully applied to data from GuangXi province, Southwest China. The results indicated that the potential bioenergy of cassava on Marginal Land under rain-fed conditions in GuangXi province is 1,909,593.96 million MJ, which is equivalent to the energy of 17.0844 million tons of standard coal; the potential energy of irrigated cassava is 2,054,017.73 million MJ, which is equivalent to the energy of 18.3765 million tons of standard coal. (C) 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
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evaluating the Marginal Land resources suitable for developing bioenergy in asia
Advances in Meteorology, 2014Co-Authors: Dong Jiang, Yaohuan Huang, Dafang ZhuangAbstract:Bioenergy from energy plants is an alternative fuel that is expected to play an increasing role in fulfilling future world energy demands. Because cultivated Land resources are fairly limited, bioenergy development may rely on the exploitation of Marginal Land. This study focused on the assessment of Marginal Land resources and biofuel potential in Asia. A multiple factor analysis method was used to identify Marginal Land for bioenergy development in Asia using multiple datasets including remote sensing-derived Land cover, meteorological data, soil data, and characteristics of energy plants and Geographic Information System (GIS) techniques. A combined planting zonation strategy was proposed, which targeted three species of energy plants, including Pistacia chinensis (P. chinensis), Jatropha curcas L. (JCL), and Cassava. The Marginal Land with potential for planting these types of energy plants was identified for each 1 km(2) pixel across Asia. The results indicated that the areas with Marginal Land suitable for Cassava, P. chinensis, and JCL were established to be 1.12 million, 2.41 million, and 0.237 million km(2), respectively. Shrub Land, sparse forest, and grassLand are the major classifications of exploitable Land. The spatial distribution of the analysis and suggestions for regional planning of bioenergy are also discussed.
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evaluating the Marginal Land resources suitable for developing pistacia chinensis based biodiesel in china
Energies, 2012Co-Authors: Dong Jiang, Dafang Zhuang, Yaohuan HuangAbstract:Bio-energy from energy plants is expected to play an increasing role in the future energy system, with benefits in terms of reducing greenhouse gas emissions and improving energy security. Pistacia chinensis is believed to be one of the most promising non-food input for biodiesel production. This study focused on the Marginal Land availability for developing Pistacia chinensis-based bioenergy in China. The spatial distribution, quality and total amount of Marginal Land resources suitable for cultivating Pistacia chinensis were identified with multiple datasets (natural habitat, remote sensing-derived Land use, meteorological and soil data) and geoinformatic techniques. The results indicate that the area of Marginal Land exploitable for Pistacia chinensis plantations in China is 19.90 million hectares, which may produce approximately 56.85 million tons of biodiesel each year. The spatial variation of both Marginal Land resources and biodiesel potential are also presented. The results can be useful for national and regional bio-energy planning.
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Assessment of bioenergy potential on Marginal Land in China
Renewable and Sustainable Energy Reviews, 2011Co-Authors: Dafang Zhuang, Dong Jiang, Lei Liu, Yaohuan HuangAbstract:Bioenergy developed from energy plants will play a more and more important role in future energy supply. Much attention has been paid to energy plants in recent years. As China has fairly limited cultivated Land resources, the bioenergy development may mainly rely on the exploitation of Marginal Land. This study focused on the assessment of Marginal Land resources and bio-fuel potential in China using newly acquired data and Geographic Information System (GIS) techniques. A multi-factor analysis method was adopted to identify Marginal Lands for bioenergy development in China, with data of several main types of energy plants on the eco-environmental requirements and natural habits employed. A combined planting zonation strategy was proposed, which was targeted for five species of energy plants including Helianthus tuberous L., Pistacia chinensis, Jatropha curcas L., Cassava and Vernicia fordii. The results indicated that total area of Marginal Land exploitable for development of energy plants on a large scale was about 43.75 million ha. If 10% of this Marginal Land was fully utilized for growing the energy plants, the production of bio-fuel would be 13.39 million tons.
Janine Schweier - One of the best experts on this subject based on the ideXlab platform.
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environmental impacts of bioenergy wood production from poplar short rotation coppice grown at a Marginal agricultural site in germany
Gcb Bioenergy, 2017Co-Authors: Janine Schweier, Saul Molinaherrera, Andrea Ghirardo, Rudiger Grote, Eugenio Diazpines, Jurgen Kreuzwieser, Edwin Haas, Klaus Butterbachbahl, Heinz Rennenberg, Jorgpeter SchnitzlerAbstract:For avoiding competition with food production, Marginal Land is economically and environmentally highly attractive for biomass production with short-rotation coppices (SRCs) of fast-growing tree species such as poplars. Herein, we evaluated the environmental impacts of technological, agronomic, and environmental aspects of bioenergy production from hybrid poplar SRC cultivation on Marginal Land in southern Germany. For this purpose, different management regimes were considered within a 21-year lifetime (combining measurements and modeling approaches) by means of a holistic Life Cycle Assessment (LCA). We analyzed two coppicing rotation lengths (7 × 3 and 3 × 7 years) and seven nitrogen fertilization rates and included all processes starting from site preparation, planting and coppicing, wood chipping, and heat production up to final stump removal. The 7-year rotation cycles clearly resulted in higher biomass yields and reduced environmental impacts such as nitrate (NO3) leaching and soil nitrous oxide (N2O) emissions. Fertilization rates were positively related to enhanced biomass accumulation, but these benefits did not counterbalance the negative impacts on the environment due to increased nitrate leaching and N2O emissions. Greenhouse gas (GHG) emissions associated with the heat production from poplar SRC on Marginal Land ranged between 8 and 46 kg CO2-eq. GJ−1 (or 11–57 Mg CO2-eq. ha−1). However, if the produced wood chips substitute oil heating, up to 123 Mg CO2-eq. ha−1 can be saved, if produced in a 7-year rotation without fertilization. Dissecting the entire bioenergy production chain, our study shows that environmental impacts occurred mainly during combustion and storage of wood chips, while technological aspects of establishment, harvesting, and transportation played a negligible role.
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selected environmental impacts of the technical production of wood chips from poplar short rotation coppice on Marginal Land
Biomass & Bioenergy, 2016Co-Authors: Janine Schweier, Jorgpeter Schnitzler, Gero BeckerAbstract:Abstract The use of Marginal Land for Short Rotation Coppice (SRC) might contribute to a sustainable energy supply in future. We assessed the environmental impacts of common production chains for manufacturing wood chips from SRC with poplar, including all the processes necessary to produce and deliver chips to a plant gate in 50 km distance from the field site (“cradle-to-plant gate”). To do so, we carried out a Life Cycle Analysis (LCA) including upstream processes. Results showed clearly that the specific environmental impacts were mainly caused by the processes “harvesting” and “transport”. Using a cut-and-chip harvesting system with a forage harvester generated low impacts during harvesting because of its high productivity. Using a cut-and-storage harvesting system with a whole rod harvester, however, didn't require accompanying tractor-trailer units during harvesting and allowed storing stems before chipping thereby, reducing the moisture content to approximately 30%. Consequently, the transport to the plant caused significantly lower environmental impacts at the same distance (50 km) which lead to a better result when looking at the overall production chain (26 vs. 36 kg CO 2 -eq Mg dm −1 ). Respective energy output to energy input ratios were 23:1 and 26:1. We also analysed the impacts of irrigation and fertigation as they might be options to increase biomass yield. Both treatments lead to considerably increased environmental impacts in all analysed categories which might be balanced only if the biomass yields increase substantially; an effect which could not be verified within the current study.
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economics of poplar short rotation coppice plantations on Marginal Land in germany
Biomass & Bioenergy, 2013Co-Authors: Janine Schweier, Gero BeckerAbstract:Abstract Although there is a need for biomass and a potential for short rotation coppice (SRC), farmers hesitate to establish SRC, even on Marginal agricultural Land on which annual crops show low productivity. Probably the most important factor explaining this reluctance might be the uncertain economic prospects of the cultivation of SRC. Therefore, the aim of this study is to analyse the economy of a typical SRC supply chain by calculating the annuities which can be expected by German farmers who establish SRC on their Marginal Land. The result shows that the yearly annuity of a 20-year SRC cultivation is about 70 € y −1 ha −1 when poplar SRC is harvested every 4 years with a forage harvester (one-step system). The result includes the establishment, cultivation and transport of the fresh wood chips to a plant 50 km away. However, this result is not competitive with the result of annual crops (226–462 € y −1 ha −1 ) and is also lower than the CAP subsidy payments that farmers receive from the EU (300 € y −1 ha −1 ). To achieve higher annuities, four options were analysed possibly leading either to higher biomass yields or to higher market prices (extension of rotation cycle, implementation of irrigation, technical drying of fresh wood chips, using a two-step harvesting system). The implementation of drip irrigation to increase biomass yield turned out to be uneconomic. An extension of the rotation cycle from 4 to 5 years can be recommended as it leads to an annuity of 255 € y −1 ha −1 (instead of 69 € y −1 ha −1 ). Results also show that the technical drying of chips using (cheap) surplus heat can be very profitable if the added value is reflected in higher market prices. Furthermore, it is shown that the use of an alternative two-step harvesting system with natural interim drying of the rods can be an attractive option for farmers to increase the annuity of their SRC.