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| Registros recuperados: 30 | |
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| Xu,Kaijie; Sun,Fengli; Wang,Yongfeng; Shi,Lili; Liu,Shudong; Xi,Yajun. |
| Abstract Switchgrass (Panicum virgatum L.; family Poaceae) is a warm-season C4 perennial grass. Tillering plays an important role in determining the morphology of aboveground parts and the final biomass yield of switchgrass. Auxin distribution in plants can affect a variety of important growth and developmental processes, including the regulation of shoot and root branching, plant resistance and biological yield. Auxin transport and gradients in plants are mediated by influx and efflux carriers. PvPIN1, a switchgrass PIN1-like gene that is involved in regulating polar transport, is a putative auxin efflux carrier. Neighbor-joining analysis using sequences deposited in NCBI databases showed that the PvPIN1gene belongs to the PIN1 family and is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Auxin transporter; PvPIN1 gene; TIBA treatment; Tillering; Switchgrass. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000100062 |
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| Torre Ugarte, Daniel de la; Walsh, Marie E.; Shapouri, Hosein; Slinsky, Stephen P.. |
| In response to energy security concerns, alternative energy programs such as biomass energy systems are being developed to provide energy in the 21st century. For the biomass industry to expand, a variety of feedstocks will need to be utilized. Large scale production of bioenergy crops could have significant impacts on the United States agricultural sector in terms of quantities, prices and production location of traditional crops as well as farm income. Though a number of scenarios were examined to study the impact of bioenergy crop production on the agricultural sector, two cropland scenarios are presented in this report. Under the wildlife management scenario, the analysis indicates that, at $30/dry ton (dt) for switchgrass,... |
| Tipo: Report |
Palavras-chave: Alternative crops; Bioenergy crops; Biomass; Conservation Reserve Program; Crop acreage shifts; Crop budgeting; Economic feasibility; Economic impact; Hybrid poplars; Hybrid willow; POLYSYS; Switchgrass; Crop Production/Industries; Resource /Energy Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/33997 |
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| Qualls, D. Joshua; Jensen, Kimberly L.; English, Burton C.; Larson, James A.; Clark, Christopher D.. |
| In the United States, biomass is the largest source of renewable energy accounting for over 3 percent of the energy consumed domestically and is currently the only source for liquid, renewable, transportation fuels. Continued development of biomass as a renewable energy source is being driven in large part by the Energy Independence and Security Act of 2007, which mandates that by 2022 at least 36 billion gallons of fuel ethanol be produced, with at least 16 billion gallons being derived from cellulose, hemi-cellulose, or lignin. However, the market for cellulosic biofuels is still under development. As such, little is known about producer response to feedstock prices paid for dedicated energy crops. While there have been some studies done on factors that... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Switchgrass; Farmer Adoption; Crop Production/Industries; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy; Q12; Q16. |
| Ano: 2011 |
URL: http://purl.umn.edu/98625 |
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| Popp, Michael P.. |
| As the hunt for renewable energy sources from agriculture intensifies, many agricultural producers are contemplating what crops to grow in the foreseeable future. On the one hand, there are traditional food crops, such as soybean, corn, and wheat, which have recently enjoyed a spike in prices, primarily because of the seemingly ever-growing demands of the corn to ethanol industry. On the other hand, there are the lesser-known perennial energy crops, such as switchgrass. Although much information on various aspects of switchgrass production exists, this paper discusses the adaptation of existing production and processing information to Arkansas conditions as a potential alternative to crop production. |
| Tipo: Journal Article |
Palavras-chave: Biofuels; Production costs; Switchgrass; Resource /Energy Economics and Policy; Q42. |
| Ano: 2007 |
URL: http://purl.umn.edu/6523 |
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| Kumarappan, Subbu; Ivanic, Rasto. |
| When the lignocellulosic biofuels industry reaches maturity and many types of biomass sources become economically viable, management of multiple feedstock supplies – that vary in their yields, density (tons per unit area), harvest window, storage and seasonal costs, storage losses, transport distance to the production plant – will become increasingly important for the success of individual enterprises. The manager’s feedstock procurement problem is modeled as a multi-period sequence problem to account for dynamic management over time. The case is illustrated with a hypothetical 53 million annual US gallon cellulosic ethanol plant located in south west Kansas that requires approximately 700,000 metric dry tons of biomass. The problem is framed over 40... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Cellulosic ethanol; Feedstock; Switchgrass; Miscanthus; Corn stover; Optimization; Biofuels; Biomass; Energy; Renewable; Agribusiness. |
| Ano: 2009 |
URL: http://purl.umn.edu/49407 |
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| Dicks, Michael R.; Campiche, Jody L.; Torre Ugarte, Daniel de la; Hellwinckel, Chad M.; Bryant, Henry L.; Richardson, James W.. |
| The Renewable Fuel Standard mandates in the Energy Independence and Security Act of 2007 will require 36 billion gallons of ethanol to be produced in 2022. The mandates require that 16 of the 36 billion gallons must be produced from cellulosic feedstocks. The potential land use implications resulting from these mandates were examined using two methods, the POLYSYS model and a general equilibrium model. Results of the POLYSYS analysis indicated that 72.1 million tons of corn stover, 23.5 million tons of wheat straw, and 24.7 million acres would be used to produce 109 million tons of switchgrass in 2025 to meet the mandate. Results of the CGE analysis indicated that 10.9 billion bushels of corn grain, 71 million tons of corn stover, and 56,200 tons of... |
| Tipo: Journal Article |
Palavras-chave: Cellulosic ethanol; Corn stover; Grain ethanol; Renewable fuel standard; Switchgrass; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Land Economics/Use; Resource /Energy Economics and Policy; Q15; Q42. |
| Ano: 2009 |
URL: http://purl.umn.edu/53091 |
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| Haque, Mohua; Biermacher, Jon T.; Kering, Maru K.; Guretzky, John A.. |
| There is limited information available explaining the agronomic and economic relationships between yield and nitrogen and phosphorus applications to growing switchgrass produced in phosphorus-deficient soils. The objective of this study was to determine the effects of nitrogen and phosphorus fertilizers on feedstock yield and measures of expected total cost, gross revenue, net return, and breakeven price of feedstock produced in phosphorus-deficient soils in the southern Great Plains. Data were collected from a three-year, two-location agronomic field study conducted in south-central Oklahoma. Two discrete nitrogen treatments (0 and 134 kg ha-1) and four discrete phosphorus treatments (0, 30, 60 and 90 kg ha-1) were randomly assigned to small plots... |
| Tipo: Presentation |
Palavras-chave: Bioenergy feedstock; Economics; Phosphorus-deficient soils; Nitrogen; Switchgrass; Crop Production/Industries; Environmental Economics and Policy; Production Economics. |
| Ano: 2012 |
URL: http://purl.umn.edu/119765 |
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| Bangsund, Dean A.; DeVuyst, Eric A.; Leistritz, F. Larry. |
| Switchgrass, a warm-season perennial grass, native to the region, has received considerable interest for its potential role as a dedicated feedstock for cellulosic-based bio-fuels. This research examined the farm-gate price needed for switchgrass to provide per-acre net returns equal to those obtained from traditional crops in south central North Dakota. Future production costs for switchgrass and net returns from traditional crops were estimated for three soil productivity classes and also were developed to reflect the historical revenue and cost patterns associated with producers who are typically more or less profitable (i.e., average net return per acre) than regional averages. Prices were calculated using an annualized equivalent analysis of... |
| Tipo: Report |
Palavras-chave: Switchgrass; Production costs; Farm-gate price; North Dakota; Soil productivity; Agribusiness; Crop Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/42253 |
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| Registros recuperados: 30 | |
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