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Additives on in vitro ruminal fermentation characteristics of rice straw R. Bras. Zootec.
Peripolli,Vanessa; Barcellos,Júlio Otávio Jardim; Prates,Ênio Rosa; McManus,Concepta; Stella,Laion Antunes; Camargo,Cláudia Medeiros; Costa Jr,João Batista Gonçalves; Bayer,Cimélio.
ABSTRACT The objective of this study was to evaluate the effects of mineral and protein-energy (MPES), exogenous fibrolytic enzyme supplements (ES), combination of MPES + ES, and straw without supplement (WS) on digestibility, fermentation kinetic parameters, cumulative gas production, methane, CO2 production, and volatile fatty acid concentration of rice straw of low and high nutritional value, estimated by in vitro techniques. The experimental design was randomized and factorial 2 × 4: two straws (low and high nutritional value) incubated with four supplements (MPES, ES, MPES + ES, and WS) and their interactions. Four experimental periods were used, totaling four replications per treatment over time. Data were analyzed by PROC MIXED of SAS. The in vitro...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Digestibility; Digestion kinetics; Fatty acid; Gas production; Methane.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982017000300240
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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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Aislamiento y caracterización in vitro de una bacteria acetogénica ruminal Colegio de Postgraduados
Rodríguez Carrillo, Jaime Azael.
La producción de metano (CH4) en rumiantes representa una pérdida de energía metabólica para el animal y contribuye en la generación de gases efecto invernadero. Una alternativa para disminuir la producción de CH4 en los rumiantes, es desarrollando inoculos de bacterias acetogénicas que compitan con las bacterias metanogénicas por los sustratos utilizados en la producción de metano. En el presente estudio se usó un medio de cultivo selectivo a base de formato y líquido ruminal (F-LR) para el asilamiento de una bacteria ruminal acetogénica. Se determinaron algunas características morfológicas y metabólicas de la bacteria aislada. También, se evaluó su capacidad para producir acetato a partir de formato, y de disminuir la metanogénesis en cocultivo...
Tipo: Tesis Palavras-chave: Metano; Bacteria ruminal acetogénica; Microorganismos ruminales; Gases efecto invernadero; Maestría; Ganadería; Methane; Acetogenica-rumen bacteria; Ruminal microorganims; Greenhouse gas effect.
Ano: 2009 URL: http://hdl.handle.net/10521/1504
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Anaerobic bio-digestion of concentrate obtained in the process of ultra filtration of effluents from tilapia processing unit R. Bras. Zootec.
Souza,Milena Alves de; Chaguri,Milena Penteado; Castelini,Fabrício Rogério; Lucas Junior,Jorge de; Vidotti,Rose Meire.
The objective of the present study was to evaluate the efficiency of the process of biodigestion of the protein concentrate resulting from the ultrafiltration of the effluent from a slaughterhouse freezer of Nile tilapia. Bench digesters were used with excrements and water (control) in comparison with a mixture of cattle manure and effluent from the stages of filleting and bleeding of tilapias. The effluent obtained in the continuous process (bleeding + filleting) was the one with highest accumulated population from the 37th day, as well as greatest daily production. Gases composition did not differ between the protein concentrates, but the gas obtained with the use of the effluent from the filleting stage presented highest methane gas average (78.05%) in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biogas; Bleeding; Filleting; Freshwater-fish; Methane.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000200002
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Anaerobic co-digestion of hatchery waste and wastewater to produce energy and biofertilizer - Batch phase AGRIAMBI
Matter,Juliana M.; Costa,Mônica S. S. de M.; Costa,Luiz A. de M.; Pereira,Dercio C.; Varennes,Amarílis de; Tessaro,Dinéia.
ABSTRACT Aiming to evaluate different wastewaters in the anaerobic co-digestion (ACoD) of hatchery wastes, a batch test was conducted in bench horizontal digesters. At the end of the process, the potential production of biogas and methane was calculated as well as the chemical composition (macro- and micronutrients) of the effluent and the concentrations of methane and carbon dioxide gas at 60 days. The monitoring of the process included observations of the reduction of the organic carbon, chemical oxygen demand, and total (TS) and volatile solids (VS), as well as the variation of pH and electrical conductivity (EC). The results showed that the mixing between the hatchery fresh waste and swine wastewater (T4) and among fresh hatchery waste, water from the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biogas; Methane; Swine wastewater; Slaughterhouse wastewater.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000900651
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Anaerobic-aerobic treatment of swine wastewater in uasb and batch reactors in series REA
Urbinati,Estevão; Oliveira,Roberto Alves de.
In this work it was evaluated the performance of two systems of swine wastewater treatment consisting of two-stage upflow anaerobic sludge blanket (UASB) reactors, with and without post-treatment in sequencing batch reactor (SBR), fed continuously, with aerobic phase. The UASB reactors in the first stage had 908 L in the sets I and II, and in the second stage 350 and 188 L, respectively. In the set II the post-treatment was performed in a SBR of 3,000 L. The hydraulic detention times in the anaerobic treatment systems were 100, 75 and 58 h in the set I; 87, 65 and 51 h in the set II; and 240 and 180 h in the SBR. The volumetric organic load applied in the first stage UASB reactors ranged from 6.9 to 12.6 g total COD (L d)-1 in the set I and 7.5 to 9.8 g...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Coliforms; Methane; Two-stage anaerobic reactors; Nutrients removal; Combined treatment.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162014000100014
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Analysis of methane biodegradation by Methylosinus trichosporium OB3b BJM
Rodrigues,Andréa dos Santos; Valdman,Belkis; Salgado,Andréa Medeiros.
The microbial oxidation of methane in the atmosphere is performed by methanotrophic bacteria that use methane as a unique source of carbon and energy. The objective of this work consisted of the investigation of the best conditions of methane biodegradation by methanotrophic bacteria Methylosinus trichosporium OB3b that oxidize it to carbon dioxide, and the use of these microorganisms in monitoring methods for methane. The results showed that M. trichosporium OB3b was capable to degrade methane in a more effective way with an initial microorganism concentration of 0.0700 g.L-1, temperature of 30ºC, pH 6.5 and using 1.79 mmol of methane. In these same conditions, there was no bacterial growth when 2.69 mmol of methane was used. The specific rate of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Methane; Biodegradation; Methanotrophic bacteria; Methylosinus trichosporium OB3b.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000200017
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Archaeal Methane Cycling Communities Associated with Gassy Subsurface Sediments of Marennes-Oleron Bay (France) ArchiMer
Roussel, Erwan; Sauvadet, Anne Laure; Allard, Jonathan; Chaduteau, Carine; Richard, Pierre; Cambon Bonavita, Marie-anne; Chaumillon, Eric.
In Marennes-Oleron Bay, a macro-tidal bay located on the French Atlantic coast, kilometer-scale acoustic turbidity reveals an accumulation of free gas in the sediment. Large concentrations of organic matter and rapid sedimentation rates provide ideal settings for biogenic methane cycling. We integrate seismic, sedimentologic, biogeochemical and molecular genetic approaches to determine whether microbial methane cycling is involved in this process. Here we show that the acoustic turbidity upper boundary matched with X-ray facies displaying fissures with the highest methane concentrations, demonstrating the existence of methane bubbles in the sediment. 16S rRNA and mcrA gene clone libraries were dominated by sequences affiliated to the three known ANME...
Tipo: Text Palavras-chave: Sediment; Methane; McrA; 16S rRNA; Archaea.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6165.pdf
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Batch anaerobic digestion of banana waste - energy potential and modelling of methane production kinetics CIGR Journal
Khan, Muhammad Tahir; Brulé, Mathieu; Maurer, Claudia; Argyropoulos, Dimitrios; Müller, Joachim; Oechsner, Hans.
Different fractions of banana (stalk, peel, and flesh) as well as the whole unpeeled banana were studied in a laboratory Biochemical Methane Potential (BMP) assay. After completion of 35-day digestion at 37°C in 2L-reactors, specific methane yields reached 0.256, 0.322, 0.367 and 0.349 m³/kg VS (volatile solids) for stalk, peel, flesh, and unpeeled banana respectively. Considering the country of Uganda, East Africa, the collection of peels and stalks from banana production would yield a theoretical potential of about 60 GWh of electrical energy per year in biogas plants. In order to verify the suitability of banana fractions to the biogas process, their chemical composition was analyzed, and their methane production kinetics was estimated with exponential...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Energy biogas; Anaerobic digestion; BMP assay; Model; Energy; Methane; Waste.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3244
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Biogas production: litter from broilers receiving direct-fed microbials and an enzyme blend Scientia Agricola
Praes,Maria Fernanda Ferreira Menegucci; Lucas Junior,Jorge de; Orrico,Ana Carolina Amorim; Orrico Junior,Marco Antonio Previdelli; Hermes,Rafael Gustavo; Sorbara,José Otávio Berti; Duarte,Karina Ferreira; Schwingel,Alice Watte; Sgavioli,Sarah; Domingues,Carla Heloisa de Faria; Sunada,Natália da Silva.
ABSTRACT The effect of additives used in the feed of broilers on anaerobic bio-digestion of poultry litter was evaluated. Four diets were used: NC: negative control; DFM: NC + 500 ppm direct-fed microbials (DFM) containing Bacillus subtilis and Bacillus licheniformis; ENZ: diet formulated with an enzyme blend (20 ppm phytase, 200 ppm protease and 200 ppm xylanase); DFM+E: ENZ + DFM. Substrates for the anaerobic bio-digestion were prepared with litter from each treatment, containing 4 % total solids (TS). These were used in 16 continuous bio-digesters with a 2 kg d−1 load, to determine the production and potential biogas production and composition during an 85-day period. Influent and effluent samples were collected for the amounts of TS and volatile solids...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Additives; Bio-digestion; Bio-digester; Methane; Livestock residues.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000500406
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Biomethane production from vinasse in upflow anaerobic sludge blanket reactors inoculated with granular sludge BJM
Barros,Valciney Gomes de; Duda,Rose Maria; Oliveira,Roberto Alves de.
ABSTRACT The main objective of this study was to evaluate the anaerobic conversion of vinasse into biomethane with gradual increase in organic loading rate (OLR) in two upflow anaerobic sludge blanket (UASB) reactors, R1 and R2, with volumes of 40.5 and 21.5 L in the mesophilic temperature range. The UASB reactors were operated for 230 days with a hydraulic detection time (HDT) of 2.8 d (R1) and 2.8-1.8 d (R2). The OLR values applied in the reactors were 0.2-7.5 g totalCOD (L d)−1 in R1 and 0.2-11.5 g totalCOD (L d)−1 in R2. The average total chemical oxygen demand (totalCOD) removal efficiencies ranged from 49% to 82% and the average conversion efficiencies of the removed totalCOD into methane were 48-58% in R1 and 39-65% in R2. The effluent recirculation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biogas; Mesophilic anaerobic treatment; Methane; Organic loading rate; Startup.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000300628
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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 Emissions, Renewable Electricity and Profits: Comparing Alternative Policies to Promote Anaerobic Digesters on Dairies AgEcon
Key, Nigel D.; Sneeringer, Stacy E..
Biogas recovery systems that use methane from manure to generate electricity have not been widely adopted in U.S. mainly because the costs of constructing and maintaining these systems have exceeded the value of the benefits provided. Climate change mitigation and renewable energy policies could increase profits for the operators of such systems thereby making digester adoption more widespread. For the U.S. Dairy sector, we examine digester adoption rates, emissions reductions, net returns, electricity generation, and program costs under different policy scenarios. We find that 3% or fewer dairies would need to adopt digesters to meet the policy goals of reducing 25% of greenhouse gas emissions from dairy manure or generating one million megawatt hours...
Tipo: Conference Paper or Presentation Palavras-chave: Anaerobic digester; Methane; Dairy; Renewable electricity; Subsidy; Carbon offsets; Climate change; Environmental Economics and Policy; Livestock Production/Industries; Q5.
Ano: 2011 URL: http://purl.umn.edu/103440
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Carbon Markets and Methane Digesters: Potential Implications for the Dairy Sector AgEcon
Key, Nigel D.; Sneeringer, Stacy E..
Anaerobic digesters that capture and burn manure methane can provide a renewable source of energy and reduce greenhouse gas emissions. Paying producers for these emission reductions—either directly or through a carbon offset market—could substantially increase digester adoption. However, there is likely to be wide variation in the scale, location, and characteristics of adopters, so these policies could have long run structural implications for the livestock sector. Using a model of digester profits and data from a nationally-representative survey of dairy operations we estimate the likely distribution of digester adoption and profits under different carbon price scenarios.
Tipo: Journal Article Palavras-chave: Anaerobic digester; Carbon offsets; Climate change; Distribution; Livestock; Methane; Environmental Economics and Policy; Q12; Q16; Q42; Q54; Q58.
Ano: 2011 URL: http://purl.umn.edu/117952
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Carbon Prices Required to Make Digesters Profitable on U.S. Dairy Farms of Different Sizes AgEcon
Lazarus, William F.; Goodkind, Andrew; Gallagher, Paul W.; Conway, Roger K..
Replaced with revised version of paper 02/15/11.
Tipo: Working or Discussion Paper Palavras-chave: Anaerobic digester; Biogas plant; Livestock manure; Electricity; Methane; Carbon offset value; Environmental Economics and Policy; Livestock Production/Industries.
Ano: 2011 URL: http://purl.umn.edu/98628
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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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Cassava wastewater (manipueira) treatment using a two-phase anaerobic biodigestor Ciênc. Tecnol. Aliment.
BARANA,Ana Cláudia; CEREDA,Marney Pascoli.
A two-phase anaerobic biodigestor was employed in order to analyze methane production with different manipueira organic loading rates. The acidogenic phase was carried out in a batch process whereas the methanogenic in an up-flow anaerobic fixed bed reactor with continuous feeding. The organic loading rates varied from 0.33 up to 8.48g of Chemical Demand Oxygen (COD)/L.day. The highest content of methane, 80.9%, was obtained with organic loading rate of 0.33g and the lowest, 56.8%, with 8.48gCOD/L.d. The highest reduction of COD, 88.89%, was obtained with organic loading rate of 2.25g and the lowest, 54.95%, with 8.48gCOD/L.d. From these data it was possible to realize that anaerobic biodigestion can be managed in at least two ways, i.e., for energy...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anaerobic biodigestion; Biogas; Wastewater; Cassava; Methane.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612000000200010
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Changes in seabed morphology, mud temperature and free gas venting at the Håkon Mosby mud volcano, offshore northern Norway, over the time period 2003-2006 ArchiMer
Foucher, Jean-paul; Dupre, Stephanie; Scalabrin, Carla; Feseker, Tomas; Harmegnies, Francois; Nouze, Herve.
The Håkon Mosby mud volcano is a 1.5-km-diameter geological structure located on the Southwest Barents Sea slope at a water depth of 1,270 m. High-definition seabed mapping of the mud volcano has been carried out in 2003 and 2006. A comparative analysis of the bathymetry and backscatter maps produced from the two surveys shows subtle morphological changes over the entire crater of the mud volcano, interpreted to be the consequence of mud eruption events. Mud temperature measurements point to a persistently warm mud at shallow depth in the crater. This is explained by upward fluid advection, rather than conductive cooling of mud flows. The small-scale spatial variability in the temperature distribution may be related to mud outflows or changes in the fluid...
Tipo: Text Palavras-chave: Sw barents sea; Cold seep ecosystems; Fluid flow; Methane; Sediment; Onshore; Fluxes; Margin; Water.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00004/11527/10261.pdf
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Climate Change Policy and the Adoption of Methane Digesters on Livestock Operations AgEcon
Key, Nigel D.; Sneeringer, Stacy E..
Methane digesters—biogas recovery systems that use methane from manure to generate electricity—have not been widely adopted in the United States because costs have exceeded benefits to operators. Burning methane in a digester reduces greenhouse gas emissions from manure management. A policy or program that pays producers for these emission reductions—through a carbon offset market or directly with payments—could increase the number of livestock producers who would profit from adopting a methane digester. We developed an economic model that illustrates how dairy and hog operation size, location, and manure management methods, along with electricity and carbon prices, could influence methane digester profits. The model shows that a relatively moderate...
Tipo: Report Palavras-chave: Methane; Methane digesters; Manure; Livestock; Climate change; Greenhouse gases; Carbon offset; Environmental Economics and Policy; Financial Economics; Livestock Production/Industries; Resource /Energy Economics and Policy.
Ano: 2011 URL: http://purl.umn.edu/102758
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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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