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Registros recuperados: 69
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Air Emissions of Ammonia and Methane from Livestock Operations: Valuation and Policy Options AgEcon
Shih, Jhih-Shyang; Burtraw, Dallas; Palmer, Karen L.; Siikamaki, Juha.
The animal husbandry industry is a major emitter of methane, which is an important greenhouse gas. The industry is also a major emitter of ammonia, which is a precursor of fine particulate matter, arguably the number-one environment-related public health threat facing the nation. We present an integrated process model of the engineering economics of technologies to reduce methane and ammonia emissions at dairy operations in California. Three policy options are explored: greenhouse gas offset credits for methane control, particulate matter offset credits for ammonia control, and expanded net metering policies to provide revenue for the sale of electricity generated from captured methane gas. Individually, any of these policies appears to be sufficient to...
Tipo: Working or Discussion Paper Palavras-chave: Methane; Ammonia; Carbon dioxide; Greenhouse gases; Climate change; Offset; Particulate matter; Net metering; Environmental policy; CAFO; Manure management; Biodigester; Electricity; Global warming; Cost-benefit; Incentive approach; Livestock Production/Industries; Q2; Q4; Q53.
Ano: 2006 URL: http://purl.umn.edu/10749
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Air-sea CO2 fluxes in a coastal embayment affected by upwelling: physical versus biological control ArchiMer
Alvarez, M; Fernandez, E; Perez, Ff.
Water column pCO(2) and air-sea CO2 fluxes were studied during an 18-month period (May 1994-September 1995) in a coastal embayment affected by upwelling, located in the northwestern Iberian Peninsula (Ria de Vigo and adjacent shelf). Overall, the region acted as a net annual atmospheric CO, sink, with magnitude ranging from 0.54 mgC m(-2) d(-1) in the Ria estuary to 22 mgC m(-2) d(-1) offshore. During moderate upwelling and upwelling relaxation conditions the sampling area was a sink for atmospheric CO2. By contrast, during winter conditions and during intense upwelling the flux reversed towards the atmosphere. The relative influence of physical and biological processes on pCO(2) was evaluated using two different approaches: firstly, statistical analysis...
Tipo: Text Palavras-chave: Dioxyde de carbone; Échange air-mer; Variabilité spatiale-temporelle; Contrôle physique-biologique; Nord-ouest de la péninsule Ibérique; Carbon dioxide; Air-sea exchange; Spatial-temporal variability; Physical-biological control; Northwestern Iberian Peninsula.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/00325/43599/43983.pdf
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Allocation of CO2 Emissions Allowances in the Regional Greenhouse Gas Cap-and-Trade Program AgEcon
Burtraw, Dallas; Palmer, Karen L.; Kahn, Danny.
Cap-and-trade programs for air emissions have become the widely accepted, preferred approach to cost-effective pollution reduction. One of the important design questions in a trading program is how to initially distribute the emissions allowances. Under the Acid Rain program created by Title IV of the Clean Air Act, most emissions allowances were distributed to current emitters on the basis of a historic measure of electricity generation in an approach known as grandfathering. Recent proposals have suggested two alternative approaches: allocation according to a formula that is updated over time according to some performance metric in a recent year (the share of electricity generation or something else) and auctioning allowances to the highest bidders....
Tipo: Working or Discussion Paper Palavras-chave: Emissions trading; Allowance allocations; Electricity; Air pollution; Auction; Grandfathering; Generation performance standard; Output-based allocation; Cost-effectiveness; Greenhouse gases; Climate change; Global warming; Carbon dioxide; Sulfur dioxide; Nitrogen oxides; Mercury; Environmental Economics and Policy; Q2; Q25; Q4; L94.
Ano: 2005 URL: http://purl.umn.edu/10650
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An Experimental Analysis of Auctioning Emission Allowances Under a Loose Cap AgEcon
Shobe, William; Palmer, Karen L.; Myers, Erica; Holt, Charles; Goeree, Jacob K.; Burtraw, Dallas.
The direct sale of emission allowances by auction is an emerging characteristic of cap-and-trade programs. This study is motivated by the observation that all of the major implementations of cap-and-trade regulations for the control of air pollution have started with a generous allocation of allowances relative to recent emissions history, a situation we refer to as a “loose cap.” Typically more stringent reductions are achieved in subsequent years of a program. We use an experimental setting to investigate the effects of a loose cap environment on a variety of auction types. We find that all auction formats studied are efficient in allocating emission allowances, but auction revenues tend to be lower relative to competitive benchmarks when the cap is...
Tipo: Journal Article Palavras-chave: Auction; Carbon dioxide; Greenhouse gases; Allowance trading; Regional Greenhouse Gas Initiative; RGGI; Cap and trade; Environmental Economics and Policy; Resource /Energy Economics and Policy.
Ano: 2010 URL: http://purl.umn.edu/90827
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An Overview of the Implications of Global Change for Natural and Managed Terrestrial Ecosystems Ecology and Society
Walker, Brian; CSIRO Sustainable Ecosystems; Brian.Walker@csiro.au; Steffen, Will; ; Will.Steffen@dwe.csiro.au.
Global change is the net effect of individual and interactive effects of changes in land use, atmospheric composition, biological diversity, and climate. A synthesis of the past six years' activities of the Global Change and Terrestrial Ecosystems project of the IGBP (International Geosphere-Biosphere Programme) deals with global change effects as ecosystem responses and living with global change. Ecosystem responses are considered in terms of changes in function and vegetation composition/structure. Field experiments of elevated CO2 effects on aboveground biomass show, on average, a positive effect on biomass, ranging from -20% to +80%. Some early predictions of CO2 effects (C3 vs. C4 plants, N-fixers, C:N in litter) are not generally supported, and it...
Tipo: Peer-Reviewed Reports Palavras-chave: Agriculture; Biomes; Carbon dioxide; Climate; Dynamics; Ecosystem functioning; Global change; Impacts; Land use; Terrestrial biosphere; Vegetation changes..
Ano: 1997
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Ancillary Benefits of Reduced Air Pollution in the United States from Moderate Greenhouse Gas Mitigation Policies in the Electricity Sector AgEcon
Burtraw, Dallas; Krupnick, Alan J.; Palmer, Karen L.; Paul, Anthony; Toman, Michael; Bloyd, Cary.
This paper considers how moderate actions to slow atmospheric accumulation of greenhouse gases from fossil fuel use also could reduce conventional air pollutants in the United States. The benefits that result would be "ancillary" to greenhouse gas abatement. Moreover, the benefits would tend to accrue locally and in the near term, while benefits from reduced climate change mostly accrue globally and over a time frame of several decades or longer. The previous literature suggests that changes in nitrogen oxides (NOx) would be the most important consequence of moderate carbon policies. We calculate these changes in a detailed electricity model linked to an integrated assessment framework to value changes in human health. A tax of $25 per metric ton of carbon...
Tipo: Conference Paper or Presentation Palavras-chave: Climate change; Greenhouse gas; Ancillary benefits; Air pollution; Co-control benefits; Nitrogen oxides; Sulfur dioxide; Carbon dioxide; Particulates; Health; Environmental Economics and Policy; H23; I18; Q48.
Ano: 2001 URL: http://purl.umn.edu/10664
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Aplicação de CO2 via água de irrigação em meloeiro. Infoteca-e
PINTO, J. M.; BOTREL, T. A.; MACHADO, E. C.; FEITOSA FILHO, J. C..
bitstream/CPATSA/7791/1/INT16.pdf
Tipo: Comunicado Técnico (INFOTECA-E) Palavras-chave: Melon.; Melão; Cucumis Melo; Dióxido de Carbono; Fertirrigação; Fotossíntese; Fruto; Qualidade.; Carbon dioxide; Fruit quality; Fertigation; Melons; Photosynthesis..
Ano: 1999 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132856
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Carbon and nitrogen emissions from stored manure and cropped fields in irrigated mountain oases of Oman JARTS
Buerkert, Andreas; Organic Plant Production and Agroecosystems Research in the Tropics and Subtropics, University of Kassel, Witzenhausen, Germany; Jahn, Henning; Organic Plant Production and Agroecosystems Research in the Tropics and Subtropics, University of Kassel, Witzenhausen, Germany; Golombek, Sabine D.; Organic Plant Production and Agroecosystems Research in the Tropics and Subtropics, University of Kassel, Witzenhausen, Germany; Rawahi, Mohammed N. Al; Organic Plant Production and Agroecosystems Research in the Tropics and Subtropics, University of Kassel, Witzenhausen, Germany; Gebauer, Jens.
Little is known about gaseous carbon (C) and nitrogen (N) emissions from traditional terrace agriculture in irrigated high mountain agroecosystems of the subtropics. In an effort towards filling this knowledge gap measurements of carbon dioxide (CO_2), methane (CH_4), ammonia (NH_3) and dinitrous oxide (N_2O) were taken with a mobile photoacoustic infrared multi-gas monitor on manure-filled PE-fibre storage bags and on flood-irrigated untilled and tilled fields in three mountain oases of the northen Omani Al Jabal al Akhdar mountains. During typical 9-11 day irrigation cycles of March, August and September 2006 soil volumetric moisture contents of fields dominated by fodder wheat, barley, oats and pomegranate ranged from 46-23%. While manure incorporation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agroecology; Agronomy and Crop Science; CO2; CH4; NH3; N2O; Carbon dioxide; Methane; Ammonia; Dinitrous oxide; Irrigation agriculture.
Ano: 2010 URL: http://www.jarts.info/index.php/jarts/article/view/2010082734354
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Carbon dioxide/methanol conversion cycle based on cascade enzymatic reactions supported on superparamagnetic nanoparticles Anais da ABC (AABC)
MARQUES NETTO,CATERINA G.C.; ANDRADE,LEANDRO H.; TOMA,HENRIQUE E..
ABSTRACT The conversion of carbon dioxide into important industrial feedstock is a subject of growing interest in modern society. A possible way to achieve this goal is by carrying out the CO2/methanol cascade reaction, allowing the recycle of CO2 using either chemical catalysts or enzymes. Efficient and selective reactions can be performed by enzymes; however, due to their low stability, immobilization protocols are required to improve their performance. The cascade reaction to reduce carbon dioxide into methanol has been explored by the authors, using, sequentially, alcohol dehydrogenase (ADH), formaldehyde dehydrogenase (FalDH), and formate dehydrogenase (FDH), powered by NAD+/NADH and glutamate dehydrogenase (GDH) as the co-enzyme regenerating system....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Carbon dioxide; Enzyme cascade-reaction; Methanol production; Superparamagnetic nanoparticles; Enzymatic catalysis.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000200593
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Carbon Dynamics Along the Seine River Network: Insight From a Coupled Estuarine/River Modeling Approach ArchiMer
Laruelle, Goulven G.; Marescaux, Audrey; Le Gendre, Romain; Garnier, Josette; Rabouille, Christophe; Thieu, Vincent.
The Seine river discharges over 700 Gg of carbon (C) every year into the sea mostly under the form of dissolved inorganic carbon (DIC) and emits 445 Gg under the form of carbon dioxide (CO2) to the atmosphere over its entire river network. The watershed, which drains 76,000 km2, is heavily populated with 18 106 inhabitants and is thus submitted to large anthropic pressure. The offline coupling of two Reactive Transport Models is used to understand the complex spatial and temporal dynamics of carbon, oxygen and nutrients and quantify the CO2 exchange at the air-water interface along the main axis of the river. The estuarine section of the Seine is simulated by the generic estuarine model C-GEM (for Carbon Generic Estuarine Model), while the upstream part of...
Tipo: Text Palavras-chave: Dissolved inorganic and organic carbon; Carbon dioxide; Reactive-transport model; Seine river and estuary; Biogeochemical budget.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00493/60421/63858.pdf
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Carbon sequestration and greenhouse gases emissions in soil under sewage sludge residual effects Scientia Agricola
Pitombo,Leonardo Machado; Carmo,Janaina Braga do; Maria,Isabela Clerici de; Andrade,Cristiano Alberto de.
The large volume of sewage sludge (SS) generated with high carbon (C) and nutrient content suggests that its agricultural use may represent an important alternative to soil carbon sequestration and provides a potential substitute for synthetic fertilizers. However, emissions of CH4 and N2O could neutralize benefits with increases in soil C or saving fertilizer production because these gases have a Global Warming Potential (GWP) 25 and 298 times greater than CO2, respectively. Thus, this study aimed to determine C and N content as well as greenhouse gases (GHG) fluxes from soils historically amended with SS. Sewage sludge was applied between 2001 and 2007, and maize (Zea mays L.) was sowed in every year between 2001 and 2009. We evaluated three treatments:...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biosolid; Nitrogen; Carbon dioxide; Methane; Nitrous oxide.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000200147
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Chemical and thermal description of the environment of the Genesis hydrothermal vent community (13 degrees N, EPR) ArchiMer
Sarradin, Pierre-marie; Caprais, Jean-claude; Briand, Patrick; Gaill, Françoise; Shillito, Bruce; Desbruyeres, Daniel.
The objective of this study is to describe the chemical and physical environment surrounding the vent organisms at the Genesis site (EPR, 2640 m). The main chimney is colonized by Riftia pachyptila, fishes Zoarcidae and crabs Bythograeidae. The top of the smoker is covered with tubes of polychaetes Alvinellidae, the frontier zone by limpet gastropods. Temperature measurements and water sampling were made on an axis along the chimney. The environment was characterized using relationships between chemical concentrations and temperature to provide a chemo-thermal model of the site. Discrete temperature ranges were 1-1.6 degrees C in sea water, 1.6-10 degrees C among Riftia plumes (up to 25 degrees C at the tube base), 7-91 degrees C close to the alvinellid...
Tipo: Text Palavras-chave: Hydrothermal ecosystem; Hydrogen sulphide; Carbon dioxide; Temperature.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00186/29764/28200.pdf
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CO2 Allowance Allocation in the Regional Greenhouse Gas Initiative and the Effect on Electricity Investors AgEcon
Burtraw, Dallas; Kahn, Danny; Palmer, Karen L..
The Regional Greenhouse Gas Initiative (RGGI) is an effort by nine Northeast and Mid-Atlantic states to develop a regional, mandatory, market-based cap-and-trade program to reduce greenhouse gas (GHG) emissions from the electricity sector. The initiative is expected to lead to an increase in the price of electricity in the RGGI region and beyond. The implications of these changes for the value of electricity-generating assets and the market value of the firms that own them depends on the initial allocation of carbon dioxide allowances, the composition of generating assets owned by the firm, and the locations of those assets. Changes in asset values inside the RGGI region may be positive or negative, whereas changes outside of the RGGI region are almost...
Tipo: Working or Discussion Paper Palavras-chave: Emissions trading; Allowance allocations; Electricity; Air pollution; Auction; Grandfathering; Generation-performance standard; Output-based allocation; Cost-effectiveness; Greenhouse gases; Climate change; Global warming; Carbon dioxide; Asset value; Environmental Economics and Policy; Q2; Q25; Q4; L94.
Ano: 2005 URL: http://purl.umn.edu/10495
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CO2, CH4 and N2O fluxes in an Ultisol treated with sewage sludge and cultivated with castor bean Rev. Bras. Ciênc. Solo
Chiaradia,Jonas Jacob; Chiba,Marcio Koiti; Andrade,Cristiano Alberto de; Carmo,Janaína Braga do; Oliveira,Claudeir de; Lavorenti,Arquimedes.
Organic residue application into soil alter the emission of gases to atmosphere and CO2, CH4, N2O may contribute to increase the greenhouse effect. This experiment was carried out in a restoration area on a dystrophic Ultisol (PVAd) to quantify greenhouse gas (GHG) emissions from soil under castor bean cultivation, treated with sewage sludge (SS) or mineral fertilizer. The following treatments were tested: control without N; FertMin = mineral fertilizer; SS5 = 5 t ha-1 SS (37.5 kg ha-1 N); SS10 = 10 t ha-1 SS (75 kg ha-1 N); and SS20 = 20 t ha-1 SS (150 kg ha-1 N). The amount of sludge was based on the recommended rate of N for castor bean (75 kg ha-1), the N level of SS and the mineralization fraction of N from SS. Soil gas emission was measured for 21...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Residue; Nitrogen; Carbon dioxide; Nitrous oxide; Methane.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000600035
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CO2 fluxes in short rotation coppices for energy production IPB - Escola Superior Agrária
Feliciano, Manuel; Tarelho, Luís; Matos, Arlindo; Azevedo, João.
Short rotation coppices (SRC), which usually consist of densely planted and high-yielding willow and poplar clones, can provide a sustainable source of energy. Furthermore, the potential of these systems as carbon sinks, recognized in the international debate on the global carbon balance and climate change impacts, may also make them a good option for many countries to receive ‘carbon credits’ to offset the effects of greenhouse gases emissions. With the purpose of evaluating and optimizing the contribution of this type of intensively managed crops in carbon sequestration, CO2 vertical fluxes have been measured in a SRC stand installed in Bragança, Portugal. Chamber based-techniques were designed to measure both CO2 soil effluxes and exchange rates between...
Tipo: Other Palavras-chave: Carbon dioxide; Exchange rates; Chamber methods; Measurements.
Ano: 2010 URL: http://hdl.handle.net/10198/3260
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Compuestos del ciclo del carbono en la zona litoral del municipio Playa, Ciudad de la Habana, Cuba. OceanDocs
Montalvo, J. F.; García, I.; Esponda, S.C.,; Cesar, M.E.; Alburquerque, O..
Se realizaron cinco muestreos entre enero de 2007 y junio de 2008 a la zona costera del municipio Playa, con el fin de evaluar los contenidos de los compuestos del ciclo del carbono. Los parámetros estudiados en la matriz agua fueron carbón orgánico, pH, alcalinidad total, alcalinidad al carbonato, dióxido de carbono total, dióxido de carbono libre, presión parcial de CO2, y contenidos de bicarbonato y carbonato. Los compuestos de carbono orgánico e inorgánico tuvieron una distribución muy heterogénea, los valores de pH (8,24±0,22) y alcalinidad total (2523±119 μmol/kg) indican que el área tiene un comportamiento alcalino, estos montos fueron similares a los encontrados en aguas de la plataforma marina cubanos y superiores a los consignados para el...
Tipo: Journal Contribution Palavras-chave: Carbon dioxide; Alkalinity; Carbon cycle; Carbon dioxide; Alkalinity; Carbon cycle; Http://aims.fao.org/aos/agrovoc/c_1302; Http://aims.fao.org/aos/agrovoc/c_8721; Http://aims.fao.org/aos/agrovoc/c_17299.
Ano: 2009 URL: http://hdl.handle.net/1834/3390
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Cost-Effectiveness of Renewable Electricity Policies AgEcon
Palmer, Karen L.; Burtraw, Dallas.
We analyze policies to promote renewable sources of electricity. A renewable portfolio standard raises electricity prices and primarily reduces gas-fired generation. A "knee" of the cost curve exists between 15% and 20% goals for 2020 in our central case, and higher natural gas prices lower the cost of greater reliance on renewables. A renewable energy production tax credit lowers electricity price at the expense of taxpayers and thus limits its effectiveness in reducing carbon emissions; it also is less cost-effective at increasing renewables than a portfolio standard. Neither policy is as cost-effective as a cap-and-trade policy for achieving carbon emissions reductions.
Tipo: Working or Discussion Paper Palavras-chave: Renewable energy; Electricity; Renewable portfolio standard; Carbon dioxide; Resource /Energy Economics and Policy; Q42; Q48; Q54.
Ano: 2005 URL: http://purl.umn.edu/10845
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Disentangling Drought and Nutrient Effects on Soil Carbon Dioxide and Methane Fluxes in a Tropical Forest ArchiMer
Bréchet, Laëtitia; Courtois, Elodie A.; Saint-germain, Thomas; Janssens, Ivan A.; Asensio, Dolores; Ramirez-rojas, Irene; Soong, Jennifer L.; Van Langenhove, Leandro; Verbruggen, Erik; Stahl, Clément.
Tropical soils are a major contributor to the balance of greenhouse gas (GHG) fluxes in the atmosphere. Models of tropical GHG fluxes predict that both the frequency of drought events and changes in atmospheric deposition of nitrogen (N) will significantly affect dynamics of soil carbon dioxide (CO2) and methane (CH4) production and consumption. In this study, we examined the combined effect of a reduction in precipitation and an increase in nutrient availability on soil CO2 and CH4 fluxes in a primary French Guiana tropical forest. Drought conditions were simulated by intercepting precipitation falling through the forest canopy with tarpaulin roofs. Nutrient availability was manipulated through application of granular N and/or phosphorus (P) fertilizer to...
Tipo: Text Palavras-chave: Carbon dioxide; Drought; Fertilization; Methane; Nitrogen; Phosphorus; Soil GHG fluxes; Tropical forest.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00595/70694/68903.pdf
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Economic growth and pollution in the long run: the case of carbon dioxide AgEcon
Burke, Paul J..
The concept underpinning the Environmental Kuznets Curve is that economic growth results in reduced pollution in the long run. In this report, an extension of Andreoni and Levinson’s (2001) theoretical model is presented. It demonstrates that an Environmental Kuznets Curve relationship can occur because high incomes allow more adoption of low-emission technologies at higher income levels. Evidence on the determinants of carbon dioxide emissions changes for OECD countries over the period 1961-2004 is presented. It highlights the importance of technology adoption in explaining whether countries have achieved emissions reductions at the same time as experiencing long-run economic growth. However, it is shown that technology adoption is affected by policy...
Tipo: Report Palavras-chave: Economic growth; Pollution; Carbon dioxide; Environmental Kuznets curve Research; Environmental Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/94804
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Effect of calcium propionate and monensin on in vitro digestibility and gas production R. Bras. Zootec.
Osorio-Teran,Amada Isabel; Mendoza-Martínez,Germán David; Miranda-Romero,Luis Alberto; Martínez-Gomez,Daniel; Hernández-García,Pedro Abel; Martínez-García,José Antonio.
ABSTRACT An evaluation of the effects of monensin and calcium propionate on the in vitro kinetics of gas production, digestibility, carbon dioxide, and minor gas production on different days was performed using the ruminal fluid from eight Suffolk lamb donors, after receiving additives for 1, 10, and 20 days. Treatments consisted of a control ration of 40% grain; 30 mg/kg of monensin in a diet with 40% grain; 10 g/kg calcium propionate in a diet with 30% grain; and the combination of both additives in a diet with 30% grain. The gas production was measured up to 72 h of incubation and all incubation procedures were repeated three times on days 1, 10, and 20. On incubation day 20, the volume and production of methane and minor gases were measured. There was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Additive feeding; Carbon dioxide; Ionophore; Methane; Rumen fermentation.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000400348
Registros recuperados: 69
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