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Dissertations / Theses on the topic 'Soil CO2'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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1

Pacific, Vincent Jerald. "Variability in soil CO2 production and surface CO2 efflux across riparian-hillslope transitions." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/pacific/PacificV0507.pdf.

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The spatial and temporal controls on soil COâ‚‚ production and surface COâ‚‚ efflux have been identified as an outstanding gap in our understanding of carbon cycling. I investigated both the spatial and temporal variability of soil COâ‚‚ concentrations and surface COâ‚‚ efflux across eight topographically distinct riparian-hillslope transitions in the ~300 ha subalpine upper-Stringer Creek Watershed in the Little Belt Mountains, Montana. Riparian-hillslope transitions provide ideal locations for investigating the spatial and temporal controls on soil COâ‚‚ concent
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2

Nichols, Lara Kaitlin. "Relationships Among Soil Properties and Soil CO2 Efflux in a Loblolly Pine-Switchgrass Intercropped System." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/51945.

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The components of soil CO2 efflux are affected by many soil properties including temperature, moisture, microbial abundance and activity, and other soil physical and chemical properties. Changes in these factors can result in high spatial and temporal variability of total soil CO2 efflux. Low molecular weight organic acids (LMWOAs), dissolved organic carbon (DOC) and dissolved organic nitrogen (DON), microbial biomass and activity were measured to evaluate the impact of intercropping switchgrass (Panicum virgatum L.) in a loblolly pine (Pinus taeda L.) plantation. Surface soil samples (0-15 cm
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3

Dennis, Wilson Dennis. "Estimation of Carbon Dioxide emissions from forest soils based on CO2 concentrations." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-33240.

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Forest soil is an important source of atmospheric CO2. Emission of CO2 from soil is the result of respiration of plant roots and soil organisms (Autotrophic and Heterotrophic respiration). This soil CO2 emission has a variation throughout the year with maximum emissions being in the summer. However, the seasonal variation affected by the external factors is not fully known. The aim of this thesis is to analyze a relationship between concentration of CO2 in the soil-atmosphere and CO2 emissions to the aboveground atmosphere. When knowing the relationship between CO2 concentration in the soil-at
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4

Almeida, Risely Ferraz [UNESP]. "CO2 emission and O2 uptake of soil under different systems." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/149886.

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Gomes, Lucas de Carvalho. "Soil CO2 Efflux in Agroforestry and Full-Sun Coffee Systems." Universidade Federal de Viçosa, 2014. http://www.locus.ufv.br/handle/123456789/6469.

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Submitted by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2015-10-29T11:11:58Z No. of bitstreams: 1 texto completo.pdf: 803649 bytes, checksum: 1e519e635e92e44f028a9515469cedbe (MD5)<br>Made available in DSpace on 2015-10-29T11:11:58Z (GMT). No. of bitstreams: 1 texto completo.pdf: 803649 bytes, checksum: 1e519e635e92e44f028a9515469cedbe (MD5) Previous issue date: 2014-10-29<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>A mudança climática global tem sido atribuída ao aumento da concentração de gases de efeito estufa na atmosfera, especialmente o dióxido
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6

Almeida, Risely Ferraz. "CO2 emission and O2 uptake of soil under different systems /." Jaboticabal, 2017. http://hdl.handle.net/11449/149886.

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Orientador: Newton La Scala Júnior<br>Banca: Liziane de Figueiredo Brito<br>Banca: Alan Rodrigo Panosso<br>Banca: Zigomar Menezes de Souza<br>Banca: Eduardo Barretto de Figueiredo<br>Abstract: The soil O2 and CO2 concentration are the two most important gases related to soil microorganisms. Thus, this thesis was developed to observe the concentration and relationship between carbon dioxide (CO2) and oxygen (O2) under different residue systems. For that, we run two soil experiments in Brazil and the USA, respectively. The first experiment was developed to examine the relationship between CO2 an
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7

Henderson, Rachel A. "Partitioning Soil CO2 Efflux through Vertical Profiles of Manipulated Forests in MOFEP." University of Toledo / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1177701393.

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8

Joshi, Gyawali Ayush. "A fresh soil health perspective: Soil health dynamics and improved measurement techniques." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/89949.

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Encouraging greater implementation of conservation agriculture practices such as reduced tillage and cover crops may require better understanding of the effect of these practices on soil health. The overall objective of this study was to quantify soil health dynamics due to conservation agriculture practices and address methodological gaps in terms of measuring soil health parameters. We developed five sites across the state of Virginia; each site had replicated plots with combinations of reduced tillage versus disk tillage and wintertime cover crops versus no cover crops as experimental treat
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9

van, Haren Joost Lambertus Maria. "Spatial and Temporal Variability of Soil CO2 and N2O Fluxes in Tropical Forest Soils: the Influence of Tree Species, Precipitation, and Soil Texture." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/145108.

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The tropics are the largest natural source of CO2 and N2O to the atmosphere and many tropical forests are changing due to climate change and forest fragmentation. To understand how these changes are affecting ecosystem feedbacks to climate change we need to investigate the plant-soil interactions in tropical forests on both local and regional scale. Locally, tree species do influence soil N2O fluxes and biogeochemistry in diverse forests. I found N2O fluxes close to four out of fifteen tree species consistently elevated above the overall mean and consistently low near two other species. H
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10

Wei, Yang. "Effects of pure and impure carbon dioxide (CO2) on soil chemistry." Thesis, University of Nottingham, 2013. http://eprints.nottingham.ac.uk/10831/.

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A cleaner use of fossil fuels supported by Carbon Capture and Storage (CCS) techniques is considered to be one of the main short-term strategies for addressing the global climate change problem. However, potential CO2 or CO2/SO2 seepage during some of the phases of a CCS project not only reduces its performing efficiency, but also impacts the local environment, which could have further impacts on human health. It is therefore essential to assess the potential risks and provide evidence that the impacts are well understood. Moreover, studying the effects of CO2 leakage is useful for identifying
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11

Rockhill, Tyler K., and Tyler K. Rockhill. "Influence of Soil Physical and Chemical Properties on Soil Co2 Flux in Semi-Arid Green Stormwater Infrastructure." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/626391.

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Rapid population growth and urbanization in semi-arid and arid regions has led to alterations in the water, carbon (C), and nitrogen (N) cycles (Gallo et al. 2014), prompting demands for mitigation strategies. Green Infrastructure (GI) is one of the methods used in urban storm water mitigation that delays and attenuates stormwater runoff by storing water in vegetated depressions. In the Southwest these depressions, also called bioswales, have the potential to act as biogeochemical hot spots, encouraging nutrient cycling, infiltration, plant growth, and microbial activity (McClain et al. 2003
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12

Sánchez-Cañete, Enrique P., Russell L. Scott, Haren Joost van, and Greg A. Barron-Gafford. "Improving the accuracy of the gradient method for determining soil carbon dioxide efflux." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/623105.

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Soil CO2 efflux (F-soil) represents a significant source of ecosystem CO2 emissions that is rarely quantified with high-temporal-resolution data in carbon flux studies. F-soil estimates can be obtained by the low-cost gradient method (GM), but the utility of the method is hindered by uncertainties in the application of published models for the diffusion coefficient. Therefore, to address and resolve these uncertainties, we compared F-soil measured by 2 soil CO2 efflux chambers and F-soil estimated by 16 gas transport models using the GM across 1year. We used 14 published empirical gas diffusio
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13

Silva, Bruna de Oliveira [UNESP]. "Emissão de CO2 e consolidação do solo a curto prazo após atividades de preparo." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/151313.

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14

Al-Traboulsi, Manal Hassen. "The responses of field-grown bean and maize crops to elevated soil CO2." Thesis, University of Nottingham, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.546479.

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15

Vallack, Harry William. "Investigation of carbon dynamics in soil plant systems using in situ CO2 measurements." Thesis, University of York, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.516543.

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16

Thomazini, André. "Spatial and temporal variability of CO2 dynamic and soil attributes in Maritime Antarctica." Universidade Federal de Viçosa, 2016. http://www.locus.ufv.br/handle/123456789/10391.

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Submitted by Marco Antônio de Ramos Chagas (mchagas@ufv.br) on 2017-05-19T13:47:10Z No. of bitstreams: 1 texto completo.pdf: 1800381 bytes, checksum: 348713e32fe650d04684641d1f30d461 (MD5)<br>Made available in DSpace on 2017-05-19T13:47:10Z (GMT). No. of bitstreams: 1 texto completo.pdf: 1800381 bytes, checksum: 348713e32fe650d04684641d1f30d461 (MD5) Previous issue date: 2016-04-25<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>A Antártica Marítima apresenta alta sensibilidade às mudanças climáticas, especialmente pelas alterações na temperatura do ar, que modificam a
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17

Selig, Marcus Franklin. "Soil Co2 Efflux and Soil Carbon Content as Influenced by Thinning in Loblolly Pine Plantations on the Piedmont of Virginia." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/33866.

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The thinning of loblolly pine plantations has a great potential to influence the fluxes and storage of carbon within managed stands. This study looked at the effects of thinning on aboveground carbon and mineral soil carbon storage, 14-years after the thinning of an 8-year-old loblolly pine plantation on the piedmont of Virginia. The study also examined soil respiration for one year following the second thinning of the same stand at age twenty-two. The study was conducted using three replicate .222 hectare stands planted using 3.05 by 3.05 meter spacing in 1980 at the Reynolds Homestead in
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18

Buragienė, Sidona. "Impact of different soil tillage technologies on the enviroment." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2013~D_20140123_134417-70543.

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Soil tillage is one of the most important agrotechnological processes having huge influence on the sowing, germination, growing, yield and quality of cultivated plants. At the same time soil tillage is one of the most expensive and energy consuming agrotechnological processes of plant cultivation. The conventional tillage technologies using mouldboard and intensive cultivation machinery have both a positive impact on the preparation of the seedbed for plants and a negative impact as they are rather detrimental to the environment, soil, its properties, biodiversity, pollution of water bodies, e
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19

Souza, Luma Castro de [UNESP]. "Emissão de CO2 do solo associada à escarificação em latossolo e em argissolo." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/149881.

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20

Watkins, Cody S. "Hydrocarbon and CO2 Emissions from Oil and Gas Production Well Pad Soils Comparative to Background Soil Emissions in Eastern Utah." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/5666.

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Emissions of methane, non-methane hydrocarbons (NMHC), and carbon dioxide (CO2) at 27 natural gas well pads, 11 non-well locations in oil and gas fields, and 7 hydrocarbon-bearing outcrops in eastern Utah between 2013 and 2016 were measured using a dynamic flux chamber (DFC) in effort to answer the following questions: What effect does the development of oil and gas have on the observed air quality (increased ozone, CO2, volatile organic compounds (VOCs), and/or methane emissions) in northeastern Utah? What percentage of these gases is due to natural background emissions, and what percentage i
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21

Olsson, Per. "Effects of fertilisation on rhizospheric and heterotrophic soil CO2 efflux in boreal Norway spruce stands /." Umeå : Dept. of Forest Ecology, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/10064860.pdf.

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22

Barba, Ferrer Josep. "Effects of drought-induced forest die-off and species replacement on soil CO2 effluxes." Doctoral thesis, Universitat Autònoma de Barcelona, 2015. http://hdl.handle.net/10803/290841.

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L’increment en la freqüència i la intensitat de les sequeres en les últimes dècades s’ha considerat responsable de molts episodis de mortalitat forestal a nivell global, particularment a la regió mediterrània. Els models prediuen un futur encara més càlid i sec per aquesta regió, però es desconeix com aquest decaïment forestal per sequera pot afectar a les emissions de CO2 i a la capacitat d’embornal de carboni (C) dels ecosistemes terrestres. Els sòls, que emmagatzemen dos terços del C dels ecosistemes terrestre, tindran un paper clau en el balanç de C. Aquesta tesi estudia els fluxos de CO2
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23

Whitaker, William Bennett Samuelson Lisa J. "Relationships between forest structure and soil CO2 efflux in 50-year-old longleaf pine." Auburn, Ala., 2009. http://hdl.handle.net/10415/2016.

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24

Cocco, Elisa. "N balance and greenhouse gas emissions (CO2, CH4, N2O) in soil with shallow groundwater." Doctoral thesis, Università degli studi di Padova, 2013. http://hdl.handle.net/11577/3426179.

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The work here presented deals with the effects that N, applied with manure, and the water regimes had in a cropping maize system. The study want to evaluate the N leaching trough groundwater and the potential greenhouse gas emission affecting global warming. Two different water regimes were studied: soil in free drainage conditions with different irrigation levels and two shallow water table conditions. The study was conducted in the Experimental Farm of Padua University. Continuous maize was cropped in lysimeters fertilized with manure and urea according to the limit imposed by Nitrates Di
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25

Gough, Christopher Michael. "Quantification and Physiology of Carbon Dynamics in Intensively Managed Loblolly Pine (Pinus taeda L.)." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11232.

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Loblolly pine (Pinus taeda L.) occupies 13 million hectares in the United States and represents a critical component of the global carbon (C) cycle. Forest management alters C dynamics, affecting the C sequestration capacity of a site. Identifying drivers that influence C cycling, quantifying C fluxes, and determining how management alters processes involved in C cycling will allow for an understanding of C sequestration capacity in managed forests. Objectives of the first study included (1) investigating environmental, soil C, root, and stand influences on soil CO2 efflux on the South Caro
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26

Snell, Helen S. K. "Using natural abundance 13C to determine the balance between plant and microbial CO2 production in soil." Thesis, University of Aberdeen, 2015. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=227607.

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Microbial decomposition of soil organic matter (SOM) releases around 98 Pg of C (as CO2) to the atmosphere annually. Quantifying CO2 emissions from SOM is necessary to monitor and manage them but is complicated by proximate respiration of CO2 from plant roots, and by the influence of roots on SOM decomposition rate. Differences in the natural abundance of 13C in root and SOM-derived respiration (of < 10 ‰ in most temperate ecosystems) can be used to apportion their contributions to soil-surface CO2 efflux. However, this is challenging because all three δ13CO2 measurements are susceptible to si
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27

Chavez, Luis Fernando. "Emissões de Co2 do solo sob preparo convencional e plantio direto em latossolo vermelho do Rio Grande do Sul." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/5476.

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Climatic change is associated with the increase of greenhouse gases (GHG) concentration, including carbon dioxide (CO2). Among the most important strategies to decrease global warming are decrease emissions and increase biological capture of CO2 through carbon sequestration in the ecosystems. Therefore, soils are fundamental to this strategy because depending in its use and management, they could act as a carbon source or sink. A study was conducted in a Rhodic Hapludox, in a long-term (22 years) experiment, to evaluate CO2-C emissions from soil produced by management practices and its depende
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28

Fitzgerald, Ruth E. "An investigation of the soil CO2 efflux in an oak woodland in South East England." Thesis, University of Reading, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.515688.

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29

Templeton, Benjamin Sean. "Environmental And Stand Variables Influencing Soil CO2 Efflux Across The Managed Range Of Loblolly Pine." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/31529.

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Managed loblolly pine forests comprise an important pool in the global carbon cycle. Understanding the influences upon inputs and outputs of this pool, including the effects of management activities, will allow landowners to understand how carbon can be sequestered in their stands. Specific to this study, we sought to create multivariate models of the output of carbon from the soil in the form of soil CO2 efflux (Rs) and a component of that total efflux, heterotrophic respiration index (Rh), from data collected across the managed range of loblolly pine in the Southeastern U.S. We also perfo
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30

Dias, Jadson Dezincourt. "Fluxo do CO2 proveniente da respiração do solo em áreas de floresta nativa da Amazônia." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/91/91131/tde-04102006-163445/.

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O sistema climático global e o ciclo do carbono interagem intensamente, e o CO2 constitui um fator dominante na definição do clima, sendo gerado e consumido pelas plantas e pela atividade de microrganismos em ecossistemas aquáticos, terrestres e na atmosfera. Na atmosfera, esse gás contribui para o efeito estufa. Em um ecossistema de floresta tropical, grande parte da produção de CO2 é proveniente da respiração do solo, e os fluxos de CO2 na interface solo-atmosfera dependem de mudanças nas características físicas, químicas e biológicas na superfície do solo. O objetivo desse estudo foi invest
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FRANCIONI, Matteo. "Soil CO2 emissions and C stock as Ecosystem Services: a comparison between transhumant and conventional farming systems." Doctoral thesis, Università Politecnica delle Marche, 2017. http://hdl.handle.net/11566/245350.

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I Servizi Ecosistemici (Ecosystem Services) sono definiti come i benefici che il genere umano riceve dagli ecosistemi. I sistemi transumanti ovini ricoprono tuttora un ruolo determinante in molti paesi dell’area mediterranea ed hanno la capacità di fornire una moltitudine di servizi ecosistemici. Tuttavia i contributi scientifici che prendono in esame tali servizi necessitano di analizzare ulteriori fattori come tradeoff e relazioni tra Ecosystem Services e biodiversità. Il presente lavoro ha l’obiettivo di fornire nuove conoscenze circa i Servizi Ecosistemici forniti dai sistemi transuma
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32

Brancaglioni, Vivian Aparecida. "Abordagem multivariada exploratória da emissão de CO2 do solo em áreas agrícolas." Botucatu, 2017. http://hdl.handle.net/11449/148784.

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Orientador: José Silvio Govone<br>Resumo: As atividades relacionadas à agricultura, silvicultura e outros usos do solo são responsáveis por cerca de um quarto das emissões antrópicas de gases do efeito estufa. Os solos estocam grandes quantidades de carbono nos ecossistemas naturais e o processo de perda de carbono do solo para a atmosfera ocorre na forma de emissão de CO2, principal gás responsável pelo efeito estufa adicional. O objetivo deste trabalho consistiu em descobrir as possíveis relações existentes entre a emissão de CO2 e atributos do solo, manejo em área agrícola e cultura cultiva
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Silva, Elienai Ferreira da [UNESP]. "Variabilidade espaço-temporal da emissão de CO2 do solo em curto período sob influência de eventos de precipitação." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/138071.

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Castellano, Gabriel Ribeiro. "Emissão de CO2 do solo em áreas de restauração na Mata Atlântica /." Rio Claro, 2015. http://hdl.handle.net/11449/138504.

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Orientador: Didier Gastmans<br>Resumo: Para o entendimento do balanço de carbono no bioma da Mata Atlântica é prioritária a caracterização das emissões de gás carbônico (CO2) pelo solo, bem como sua correlação com as variáveis ambientais e as características químicas, físicas e biológicas do solo. O presente estudo teve como objetivo principal caracterizar as taxas de emissão de CO2 no solo, em duas áreas florestais, sobre Argissolo vermelho, dentro do domínio morfoclimático da Mata Atlântica, na Floresta Estadual Edmundo Navarro de Andrade (FEENA), situada no município de Rio Claro - SP. Acre
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Kreba, Sleem. "LAND USE IMPACT ON SOIL GAS AND SOIL WATER TRANSPORT PROPERTIES." UKnowledge, 2013. http://uknowledge.uky.edu/pss_etds/31.

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The consequences of land use choices on soil water and gas transport properties are significant for gas and water flux in agricultural environments. Spatial and temporal patterns and associations of soil water and soil gas characteristics and processes in different land uses are not well understood. The objectives of this study were to 1) characterize soil structure under crop and grass systems, 2) quantify spatial patterns and associations of soil physical characteristics in crop and grass systems, and 3) quantify spatial and temporal patterns and associations of CO2 and N2O fluxes. The resea
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36

Teixeira, Luís Gustavo [UNESP]. "Efeito do preparo sobre a emissão de CO2 do solo em áreas agrícolas descrita por modelo exponencial decrescente no tempo." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/96983.

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Made available in DSpace on 2014-06-11T19:28:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-06-21Bitstream added on 2014-06-13T20:37:33Z : No. of bitstreams: 1 teixeira_lg_me_jabo.pdf: 3324980 bytes, checksum: c588c0fe971e863b13d299ae775c6afb (MD5)<br>Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)<br>Usina São Martinho<br>O preparo do solo tem sido apontado como uma das práticas que causam perda adicional de carbono do solo para a atmosfera na forma de CO2, o principal gás do efeito estufa ampliado. Neste trabalho são estudados alguns aspectos da emissão de CO2 do s
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Panosso, Alan Rodrigo. "Variabilidade espacial da emissão de CO2, temperatura e umidade em latossolo sob cultivo de cana-de-açúcar em sistemas de colheita manual com queima e mecanizada /." Jaboticabal : [s.n.], 2006. http://hdl.handle.net/11449/88280.

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Resumo: A caracterizacao da variabilidade espacial de atributos do solo de areas agricolas e uma tarefa importante, pois somada a influencia dos aspectos pedologicos temos uma grande contribuicao do manejo. Neste trabalho foi determinada a estrutura da variabilidade espacial da emissao de CO2, temperatura e umidade em Latossolo Vermelho eutroferrico em tres localidades sob cultivo da cana-de-acucar em sistemas de manejos de cana crua e de cana queimada, no nordeste do Estado de Sao Paulo. As maiores emissoes foram observadas no local sob manejo de cana queimada, num valor medio de 2,05 Êmol m-
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Leite, Vanir Dirley Partelli de Oliveira. "Transporte de CO2 no Sistema Solo-Planta-Atmosfera /." Rio Claro : [s.n.], 2010. http://hdl.handle.net/11449/91922.

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Orientador: Roberto Naves Domingos<br>Banca: Alberto Ibãnez Ruiz<br>Banca: Dermeval José Mazzini Sartori<br>Resumo: A cultura de cana-de-açúcar no Brasil ocupa uma extensa área, devido a sua importância econômica e seu potencial na obtenção de bioenergia. É importante saber como esta cultura irá responder ao aumento previsto na concentração de gás carbônico (CO2) atmosférico, uma vez que é um composto chave nos processos das mudanças climática globais. Sabendo que esse gás é emitido tanto pelas folhas como pelas raízes das plantas e difundido pelo solo, o objetivo desse trabalho foi desenvolve
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Tavares, Rose Luiza Moraes 1983. "Emissão de CO2 e atributos físicos, químicos e microbiológicos do solo em sistemas de manejo de cana-de-açúcar." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257129.

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Orientadores: Zigomar Menezes de Souza, Newton La Scala Júnior<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agrícola<br>Made available in DSpace on 2018-08-25T15:33:49Z (GMT). No. of bitstreams: 1 Tavares_RoseLuizaMoraes_D.pdf: 2430088 bytes, checksum: fe55a6415be1eae3346ac8d620e6ec77 (MD5) Previous issue date: 2014<br>Resumo: O sistema de colheita mecanizada da cana-de-açúcar em substituição ao processo de queima do canavial tem sido adotado pelo setor canavieiro visando benefícios na qualidade do solo e ambiente, principalmente no que diz respeito a mini
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Zakharova, Anna. "Soil organic matter dynamics: influence of soil disturbance on labile pools." Thesis, University of Canterbury. School of Biological Sciences, 2014. http://hdl.handle.net/10092/9944.

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Soils are the largest pool of carbon (C) in terrestrial ecosystems and store 1500 Gt of C in their soil organic matter (SOM). SOM is a dynamic, complex and heterogeneous mixture, which influences soil quality through a wide range of soil properties. Labile SOM comprises a small fraction of total SOM (approximately 5%), but due to its rapid turnover has been suggested to be most vulnerable to loss following soil disturbance. This research was undertaken to examine the consequences of soil disturbance on labile SOM, its availability and protection in soils using the isotopic analysis of soil-res
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Veras, Ludhanna Marinho. "Anisotropia da variabilidade espacial da emissão de co2 do solo sob cultivo de cana-de-açúcar e eucalipto /." Jaboticabal, 2019. http://hdl.handle.net/11449/182142.

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Orientador: Alan Rodrigo Panosso<br>Resumo: O dióxido de carbono (CO2) é um dos principais gases do efeito estufa adicional, sendo a agricultura uma grande contribuinte para a emissão do mesmo no Brasil. Para melhor modelar a perda de carbono do solo via CO2, deve-se considerar a variação espacial dessa variável, bem como dos atributos do solo, atento ao uso do solo agrícola e manejo. O presente estudo objetivou caracterizar a anisotropia espacial de FCO2 e atributos físicos e químicos do solo por meio da dimensão fractal (DF), na região do Cerrado no Mato Grosso do Sul. Para o estudo da aniso
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Khalil, Aveen. "Assessing the responses of wheat roots and shoots to variations in soil water, temperature and CO2 concentration." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/41101/.

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Wheat (Triticum aestivum L.) is one of the most important cereal crops in the world. In order to meet the food requirements of the current trend in population growth, enhancement in wheat production and yield are urgently needed. Water and temperature stress are major constraints to wheat production and subsequently food security in the context of climate change. Plant growth is affected by both above- and belowground environmental conditions and increasing atmospheric CO2 concentrations have been reported to enhance growth and yield of most agricultural crops. The responses of wheat roots and
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Teixeira, Luís Gustavo. "Efeito do preparo sobre a emissão de CO2 do solo em áreas agrícolas descrita por modelo exponencial decrescente no tempo /." Jaboticabal : [s.n.], 2010. http://hdl.handle.net/11449/96983.

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Resumo: O preparo do solo tem sido apontado como uma das práticas que causam perda adicional de carbono do solo para a atmosfera na forma de CO2, o principal gás do efeito estufa ampliado. Neste trabalho são estudados alguns aspectos da emissão de CO2 do solo de áreas agrícolas na região de Jaboticabal, SP, Brasil. Os experimentos foram realizados em duas áreas onde estudou-se o efeito do preparo do solo com arado de disco seguido de grade niveladora (convencional), escarificador de arrasto conjugado com rolo destorroador (reduzido) e enxada rotativa sobre as emissões de CO2 do solo. No experi
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44

Panosso, Alan Rodrigo [UNESP]. "Variabilidade espacial da emissão de CO2, temperatura e umidade em latossolo sob cultivo de cana-de-açúcar em sistemas de colheita manual com queima e mecanizada." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/88280.

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Made available in DSpace on 2014-06-11T19:23:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-09-12Bitstream added on 2014-06-13T20:50:12Z : No. of bitstreams: 1 panosso_ar_me_jabo.pdf: 2194382 bytes, checksum: c6f96722456045aaddb9ac21be01b595 (MD5)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>A caracterizacao da variabilidade espacial de atributos do solo de areas agricolas e uma tarefa importante, pois somada a influencia dos aspectos pedologicos temos uma grande contribuicao do manejo. Neste trabalho foi determinada a estrutura da variabilidade espaci
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Bicalho, Elton da Silva [UNESP]. "Estrutura de variabilidade espacial e temporal da emissão de CO2 e atributos do solo caracterizada por dimensão fractal em área de cana-de-açúcar." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/96815.

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Made available in DSpace on 2014-06-11T19:28:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-02-28Bitstream added on 2014-06-13T19:16:24Z : No. of bitstreams: 1 bicalho_es_me_jabo.pdf: 503292 bytes, checksum: d2ce2166bc9f68e6b65aa37ca5a4615c (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>A emissão de CO2 do solo (FCO2) é influenciada por processos físicos, químicos e biológicos que afetam a produção de CO2 no interior do solo e o seu transporte para a atmosfera, variando no temp
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Ensor, Breanne Leigh. "Spatial and Temporal Trends in Greenhouse Gas Fluxes from a Temperate Floodplain along a Stream-Riparian-Upland Gradient." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/71424.

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Increased floodplain and wetland restoration activity has raised concerns about potential impacts on the release of greenhouse gases (GHGs) to the atmosphere due to restored connectivity between aquatic and terrestrial ecosystems. Research has shown GHG fluxes from hydrologically active landscapes such as floodplains and wetlands vary spatially and temporally in response to primary controls including soil moisture, soil temperature, and available nutrients. In this study, we performed a semimonthly sampling campaign measuring GHG (CO2, CH4, and N2O) fluxes from six locations within a third-ord
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McElligott, Kristin Mae. "Soil Respiration and Decomposition Dynamics of Loblolly Pine (Pinus taeda L.) Plantations in the Virginia Piedmont." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/75154.

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Forests of the southeastern U.S. play an important role in meeting the increasing demand for forest products, and represent an important carbon (C) sink that can be managed as a potential tool for mitigating atmospheric CO2 concentrations and global climate change. However, realizing this potential depends on full accounting of the ecosystem carbon (C) budget. The separate evaluation of root-derived, autotrophic (RA) and microbially-derived heterotrophic (RH) soil respiration in response to management and climate change is important, as environmental and ecological factors often differentiall
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Santos, Gustavo André de Araújo. "Emissão de CO2 associada aos atributos do solo sob semeadura direta com diferentes sucessões de culturas /." Jaboticabal, 2017. http://hdl.handle.net/11449/151359.

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Orientador: Newton La Scala Junior<br>Coorientador: José Eduardo Corá<br>Coorientador: Daniel De Bortoli Teixeira<br>Banca: Zigomar Menezes de Souza<br>Banca: Diego Silva Siqueira<br>Resumo: A otimização de sistemas conservacionistas de produção, com objetivo de aumentar os estoques de carbono e diminuir a emissão de gases de efeito estufa, e em concomitância aumentar a produtividade agrícola, são considerados um dos maiores desafios da agricultura atual. Diante disto, objetivou-se avaliar a emissão de CO2 (FCO2) e sua relação com os atributos do solo em sistema de semeadura direta com diferen
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Keidel, Lisa [Verfasser]. "The effect of elevated CO2 on soil C and N dynamics and its feedback on CO2 and N2O emissions from a temperate grassland ecosystem : results from a long-term Free Air CO2 Enrichment (FACE) experiment / Lisa Keidel." Gießen : Universitätsbibliothek, 2019. http://d-nb.info/1198674083/34.

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Barron-Gafford, Greg Alan. "TEMPERATURE AND PRECIPITATION CONTROLS OVER SOIL, LEAF AND ECOSYSTEM LEVEL CO2 FLUX ALONG A WOODY PLANT ENCROACHMENT GRADIENT." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/193976.

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Woody plant encroachment (WPE) into historic grasslands not only alters ecosystem structure but also yields a mosaic of vegetative growth-forms that differ in their inherent physiological capacities and physical attributes. C₃ plants tend to have a relatively broad range of temperature function but at the expensive of a lower optimum rate of photosynthesis. In contrast, C₄ grasses have a greater capacity for maximum uptake but across a relatively narrow range of temperatures. In considering which of these functional groups will outcompete the other within these regions undergoing WPE, one must
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