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Dissertations / Theses on the topic 'Nutrient input'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

McGrath, Steven Russell. "Poultry Litter as a Nutrient Source for Low Input Forage Systems." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/33082.

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Despite high volumes of manure production in the Shenandoah Valley, there are still areas of forage production in the Shenandoah Valley that are nutrient deficient, because manures have traditionally been applied to higher value row crops. Furthermore, anecdotal reports have suggested that application of poultry litter to pastureland may increase the abundance of weeds. This study was conducted to compare the effects of poultry litter and inorganic fertilizers on soil fertility, aboveground botanical composition and soil seed bank composition of established mixed naturalized pastures. Two site

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2

Hartwig, Melanie. "Impact of fine sediment and nutrient input on the hyporheic functionality:." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-222363.

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The hyporheic interstitial was recognized as an integral zone within the aquatic ecosystem bearing important functions for both adjacent compartments, surface and ground water, about 50 years ago. Since then, rather disciplinary works gained knowledge on the organismic community of this ecotone, its spatial extent, the role of distinct parameters such as hydrology and morphology, temporal characteristics, process dynamics, the role for stream or groundwater quality and restoration measures. However, a systematic study on the risks to the hyporheic functions was missing to date. This thesis co

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3

Liyana, Pathirana Navoda. "Nutrient-level analysis of the sustainability of food systems." Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29975.

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Healthy and sustainable dietary transformations offer significant potential to improve the health and sustainability of food systems. However, devising sustainable and healthy diets is challenging due to the lack of understanding of the relationship between nutrients and sustainability. The main aim of this thesis is to introduce a nutrient-level sustainability assessment approach to understand the win-win and trade-offs when developing healthy and sustainable diets. The novel approach for assessing sustainability in relation to macronutrients was introduced by integrating the input-output tec

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4

Chan, Yi-kei, and 陳伊祺. "Nutrient input of Tolo Harbour by river, atmospheric deposition and submarine groundwater discharge." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B46732718.

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5

Ampontuah, Emmanuel Osei. "Model input resolution effects on the prediction of sediment and nutrient transport from agricultural fields." Thesis, University of Reading, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433462.

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6

Lindenberg, Mary K. "The quantity, characteristics, source and nutrient input of groundwater seepage into the Indian River Lagoon, FL." [Gainesville, Fla.] : University of Florida, 2001. http://purl.fcla.edu/fcla/etd/UFE0000328.

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Thesis (M.S.)--University of Florida, 2001.<br>Title from title page of source document. Document formatted into pages; contains xii, 117 p.; also contains graphics. Includes vita. Includes bibliographical references.

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7

Sergi, Sara. "Nutrient input from seamounts and hydrothermal vents in the Southern Ocean : impacts on the pelagic ecosystems and implications for conservation." Electronic Thesis or Diss., Sorbonne université, 2021. http://www.theses.fr/2021SORUS508.

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Les processus bottom-up contôlent une portion importante de la variabilité des écosystèmes marins. Dans l'océan Austral, des contrastes intenses dans la distribution des écosystèmes pélagiques sont génerés par la limitation de la production primaire par le fer et la Courant Circumpolaire Antarctique. Les efflorescences massives en phytoplancton en aval des îles entretiennent des vastes réseaux trophiques. En comparaison, l'impact des sources profondes de nutriments sur la production pélagique semble négligeable. Les programmes de conservation dans la Courant Circumpolaire Antarctique vont

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8

Scheile, Thorsten [Verfasser], Bettina [Akademischer Betreuer] Tonn, Johannes [Gutachter] Isselstein, Nicole [Gutachter] Wrage-Mönnig, and Klaus [Gutachter] Dittert. "Effect of plant and animal functional traits on nutrient cycling in low-input pastures / Thorsten Scheile ; Gutachter: Johannes Isselstein, Nicole Wrage-Mönnig, Klaus Dittert ; Betreuer: Bettina Tonn." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2018. http://d-nb.info/1166399834/34.

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9

Hartwig, Melanie [Verfasser], Dietrich [Akademischer Betreuer] Borchardt, Jan H. [Gutachter] Fleckenstein, and Michael [Gutachter] Mutz. "Impact of fine sediment and nutrient input on the hyporheic functionality: : A case study in Northern Mongolia / Melanie Hartwig ; Gutachter: Jan H. Fleckenstein, Michael Mutz ; Betreuer: Dietrich Borchardt." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://d-nb.info/1130092755/34.

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10

Hartwig, Melanie [Verfasser], Dietrich Akademischer Betreuer] Borchardt, Jan H. [Gutachter] Fleckenstein, and Michael [Gutachter] [Mutz. "Impact of fine sediment and nutrient input on the hyporheic functionality: : A case study in Northern Mongolia / Melanie Hartwig ; Gutachter: Jan H. Fleckenstein, Michael Mutz ; Betreuer: Dietrich Borchardt." Dresden : Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://d-nb.info/1130092755/34.

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11

Müller, Anke Katrin [Verfasser], Edzo [Akademischer Betreuer] Veldkamp, Marife [Akademischer Betreuer] Corre, and Klaus [Akademischer Betreuer] Butterbach-Bahl. "Soil greenhouse gas fluxes under elevated nutrient input along an elevation gradient of tropical montane forests in southern Ecuador / Anke Katrin Müller. Gutachter: Edzo Veldkamp ; Marife Corre ; Klaus Butterbach-Bahl. Betreuer: Edzo Veldkamp." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://d-nb.info/1060246465/34.

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12

Lesworth, Tim. "Atmospheric nutrient inputs to the Atlantic Ocean." Thesis, University of East Anglia, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445197.

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13

Canals, Merseburger Mª Goretti. "Nutrient dynamics and metabolism in Mediterranean streams affected by nutrient inputs from human activities." Doctoral thesis, Universitat de Barcelona, 2006. http://hdl.handle.net/10803/1434.

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A full understanding of nutrient cycling in lotic ecosystems is crucial given the increasing influence of human activities on the eutrophication of streams and rivers. However, existing knowledge about nutrient cycling in human-altered streams (i.e., receiving point and diffuse sources) is still limited. The general objective of this dissertation was to examine point source effects on stream functional attributes, such as nutrient retention, denitrification and metabolism rates. We also quantified how the studied biogeochemical processes contribute to remove dissolved inorganic nitrogen (DIN)

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14

Attisano, Karina Kammer. "Aporte subterrâneo: uma fonte complementar de nutrientes para a costa do Sul do Brasil e plataforma adjacente." reponame:Repositório Institucional da FURG, 2012. http://repositorio.furg.br/handle/1/4263.

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Tese(doutorado) - Universidade Federal do Rio Grande, Programa de Pós–Graduação em Oceanografia Biológica, Instituto de Oceanografia, 2012.<br>Submitted by Cristiane Gomides (cristiane_gomides@hotmail.com) on 2013-12-15T10:09:04Z No. of bitstreams: 1 karina.pdf: 8139075 bytes, checksum: c30bac487b6f4defadafc03c71b60d50 (MD5)<br>Approved for entry into archive by Sabrina Andrade (sabrinabeatriz@ibest.com.br) on 2013-12-18T17:52:30Z (GMT) No. of bitstreams: 1 karina.pdf: 8139075 bytes, checksum: c30bac487b6f4defadafc03c71b60d50 (MD5)<br>Made available in DSpace on 2013-12-18T17:52:30Z (GMT). No.

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15

Ayaga, George Odwar. "Improving the efficiency of phosphate utilization in low-input maize production in Kenya." Thesis, Nottingham Trent University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324009.

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16

Venero, Jesus A. Davis D. Allen. "Optimization of dietary nutrient inputs for Pacific white shrimp Litopenaeus vannamei." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Spring/doctoral/VENERO_ROMAN_33.pdf.

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17

Zamora, Lauren Maria. "Inputs and Biogeochemical Impacts of Nutrient Deposition on the Subtropical North Atlantic." Scholarly Repository, 2010. http://scholarlyrepository.miami.edu/oa_dissertations/477.

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Atmospheric nitrogen deposition to the ocean has more than doubled in the past 150 years due to anthropogenic activity, reaching levels comparable with nitrogen fixation in the subtropical North Atlantic. Previous studies have suggested that atmospherically deposited N may increase export production, decrease surface water phosphate levels, and substantially impact geochemical estimates of nitrogen fixation. This dissertation reports on the magnitude and biogeochemical fate of soluble N and P deposition in the subtropical North Atlantic. Aerosol and wet deposition time-series samples were used

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18

Henman, David Francis. "Rapid transient dynamics in response to altered nutrient inputs on park grass." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251687.

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19

Zhang, Ping. "Nutrient inputs from trees via throughfall, stemflow and litterfall in an intercropping system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0003/MQ43241.pdf.

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20

Prentice, Matthew J. "Phosphorus sources contributing to phytoplankton blooms in a subtropical reservoir." Thesis, Griffith University, 2021. http://hdl.handle.net/10072/408508.

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Lakes comprise 87% of surface freshwater existing in liquid form on Earth. In recent years, however, lake condition has deteriorated at an alarming rate primarily attributed to an increase in anthropogenic-related nutrient inputs. These inputs present the greatest challenge to lake ecosystem stability as they cause eutrophication, which is often characterised by deoxygenation of bottom waters and phytoplankton blooms. Blooms of cyanobacteria are of particular concern as some species or strains produce toxins that affect biodiversity and organisms that are part of the foodweb, as well as causin

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21

Flower, Charlotte Amanda. "Atmospheric inputs of nutrients and pollutants to uplands in north-east Scotland." Thesis, University of Aberdeen, 1987. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU010068.

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The effects of vegetation size and architecture, in combination with elevation effects, on the amounts of atmospheric inputs of both nutrient and pollutant substances were studied by means of collecting precipitation both above and below tree and heather canopies. Use was made of 'filter' type gauges, designed to enhance interception deposition, in order to identify the main ionic substances associated with this deposition type. Results illustrate how effects of tree size and shape, as well as elevation, are tempered by local topographic and climatic factors. The total leaf area of the canopy

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22

Semple, Adelaide Mary. "Nitrogen balance and changes in soil nutrients in reduced inputs systems of cropping." Thesis, Queen's University Belfast, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284399.

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23

Powell, Claire. "Atmospheric inputs of iron and other key nutrients to the tropical North Atlantic." Thesis, University of East Anglia, 2010. https://ueaeprints.uea.ac.uk/34221/.

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24

Bollens, Ursula. "Effects of nutrient inputs and water regime on wetland vegetation and the performance of wetland species /." [S.l.] : [s.n.], 2000. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13560.

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25

CINTRA, ANDREA TEIXEIRA DE FIGUEIREDO. "ATMOSPHERIC INPUTS OF NUTRIENTS AND POLLUTANTS INTO URBAN FOREST ECOSYSTEM, MACIÇO DA PEDRA BRANCA RJ." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=5852@1.

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COORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR<br>A ciclagem de nutrientes em ecossistemas florestais constitui um processo de troca dinâmica entre os componentes bióticos e abióticos. A precipitação pluviométrica é uma vertente do processo de ciclagem, representando uma importante fonte de entrada de nutrientes e de eventuais poluentes em ecossistemas localizados próximo a fontes poluidoras. O perfil de ciclagem e alocação de nutrientes de uma região influenciam a fisiologia, biologia de plantas e animais em florestas, além de auxiliar no entendimento de processos sucessionais.

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26

Griffith, Kereen. "Effects of Vegetation Structure and Canopy Exposure on Small-scale Variation in Atmospheric Deposition Inputs to a Mixed Conifer Forest in California." Thesis, University of North Texas, 2014. https://digital.library.unt.edu/ark:/67531/metadc500055/.

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Data on rates of atmospheric deposition is limited in many montane ecosystems, where high spatial variability in meteorological, topographic, and vegetation factors contributes to elevated atmospheric inputs and to the creation of deposition hotspots. Addressing the ecological consequences of increasing deposition in these areas will require a better understanding of surface controls influencing atmospheric deposition rates at both large and small-scales. The overarching objective of this thesis research was to understand the influence of vegetation structure and canopy exposure on small-scale

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27

Attisano, Karina Kammer. "A oceanografia química e os processos oceanográficos presentes na plataforma continental das regiões de Santa Marta (SC) e Albardão (RS)." reponame:Repositório Institucional da FURG, 2007. http://repositorio.furg.br/handle/1/3523.

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Dissertação(mestrado) - Universidade Federal do Rio Grande, Programa de Pós-Graduação em Oceanografia Física, Química e Geológica, Instituto de Oceanografia, 2007.<br>Submitted by Cristiane Silva (cristiane_gomides@hotmail.com) on 2013-02-18T17:26:18Z No. of bitstreams: 1 2007_karina_attisano.pdf: 8850374 bytes, checksum: 292caec84f69bf4efc38580f79e98729 (MD5)<br>Approved for entry into archive by Bruna Vieira(bruninha_vieira@ibest.com.br) on 2013-06-13T18:40:54Z (GMT) No. of bitstreams: 1 2007_karina_attisano.pdf: 8850374 bytes, checksum: 292caec84f69bf4efc38580f79e98729 (MD5)<br>Made availa

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28

Bohlen, Patrick Joseph. "The influence of earthworms on carbon and nitrogen cycling processes in agroecosystems based on organic or inorganic nutrient inputs /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487849696967951.

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29

Birk, Jago Jonathan [Verfasser], Bruno [Akademischer Betreuer] Glaser, and Wulf [Akademischer Betreuer] Amelung. "Pre-Columbian Nutrient Inputs into Terras Pretas and Raised Fields in Amazonia / Jago Jonathan Birk. Betreuer: Bruno Glaser ; Wulf Amelung." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2014. http://d-nb.info/1058104667/34.

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Birk, Jago Jonathan [Verfasser], Bruno Akademischer Betreuer] Glaser, and Wulf [Akademischer Betreuer] [Amelung. "Pre-Columbian Nutrient Inputs into Terras Pretas and Raised Fields in Amazonia / Jago Jonathan Birk. Betreuer: Bruno Glaser ; Wulf Amelung." Halle, Saale : Universitäts- und Landesbibliothek Sachsen-Anhalt, 2014. http://nbn-resolving.de/urn:nbn:de:gbv:3:4-12760.

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31

Kipp, Lauren Elizabeth. "Radium isotopes as tracers of boundary inputs of nutrients and trace elements to the coastal and open ocean." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119990.

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Thesis: Ph. D., Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Nutrients and trace metals are vital for supporting life in the ocean, but the boundary processes that control the distributions of these elements are poorly constrained. Radium isotopes are well suited to studying inputs of elements from ocean margins because they are produced in

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32

Hsieh, Yu-Te. "Using uranium- and thorium-series isotopes as tracers for trace-metal inputs to the oceans." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:9574b34a-3932-4a16-a823-17028ef889f2.

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This thesis explores the use of U-Th series isotopes as tracers to study ocean mixing and chemical inputs to the open ocean from atmospheric dust, rivers, continental shelves and ocean sediments. The use of Th isotopes as an improved tracer of dust input has been tested by measuring <sup>232</sup>Th and <sup>230</sup>Th concentrations of upper-ocean seawater at six stations along a meridional Atlantic section that spans the Saharan dust plume. The results of <sup>232</sup>Th-derived dust fluxes show good agreements with dust model depositions, and suggest that thorium may be a more accurate tr

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33

Chowdhury, Somak [Verfasser], Erika [Gutachter] Kothe, Gerd [Gutachter] Gleixner, and Christoph [Gutachter] Tebbe. "Effect of plant inputs and nutrient acquisition strategies on soil microbial community / Somak Chowdhury ; Gutachter: Erika Kothe, Gerd Gleixner, Christoph Tebbe." Jena : Friedrich-Schiller-Universität Jena, 2021. http://d-nb.info/1239177496/34.

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34

Teklay, Tesfay. "Organic inputs from agroforestry trees on farms for improving soil quality and crop productivity in Ethiopia /." Umeå : Dept. of Forest Ecology, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/2005122.pdf.

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35

Calil, Francine Neves. "Aspectos nutricionais de um sistema agroflorestal com eucalipto no sul do Rio Grande do Sul, Brasil." Universidade Federal de Santa Maria, 2008. http://repositorio.ufsm.br/handle/1/3718.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>This study was conducted at an experimental area at Aroeira Farm, belonging to Votorantim Celulose e Papel company, under the geographic coordinates 31° 45 50.7 S e 53° 50 34.9 W, located in Candiota county. In the area there is an experimental field, where some production factors involved in an agroflorestry system are being monitored, with four different treatments (T 1 = eucalyptus planted in 3 m x 2 m spacing; T2= native grass; T3 agroforestry system planted in double line and T4 agroforestry system planted in triple line

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36

Powell, Paula Angele. "The effects of hydrology and nutrient inputs at South Milton Ley on the ecology of the common reed Phragmites australis (Cav. Trin. ex Steudal)." Thesis, University of Plymouth, 2000. http://hdl.handle.net/10026.1/2061.

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South Milton Ley is a small coastal wetland in Southern England. A sand-bar forms periodically at its seaward end and separates fresh water from the sea. The common reed Phragmites australis dominates the wetland and when a sand bar is present a shallow freshwater lake forms. Monthly water budgets were prepared for the years 1994, 1995 and 1996 and intermittent flooding of the Ley was also monitored. This information was used to calculate a range of residence times (between one hour and eleven days) and the characteristics of various flow regimes when the sandbar, which dams the Ley, is open o

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37

Bizon, José Márcio Cossi. "Avaliação da sustentabilidade nutricional de plantios de Pinus taeda L. usando um balanço de entrada-saída de nutrientes." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/11/11150/tde-22102007-092659/.

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O conhecimento da sustentabilidade nutricional dos manejos aplicados às floresta plantadas é necessário para a adequada gestão desses empreendimentos, principalmente com plantações estabelecidas em solos de baixa fertilidade, utilizando a queima de resíduos pré-preparo, e sem a devida reposição nutricional, como é o caso do P.taeda em várias regiões do sul do país. Dada a crescente importância econômica da espécie, e considerando a necessidade de se manter, ou aumentar, sua produtividade, estabeleceu-se um estudo visando estimar a sustentabilidade nutricional de cenários de manejo para o P. ta

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38

Hicks, Lettice Cricket. "Controls on carbon cycling in tropical soils from the Amazon to the Andes : the influence of climate, plant inputs, nutrients and soil organisms." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/23477.

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Tropical soils are a globally important store of terrestrial carbon (C) and source of atmospheric carbon dioxide (CO2), regulated by the activity of soil microorganisms, through the mineralisation of plant residues and soil organic matter (SOM). Climatic warming will influence microbial activity, and this may accelerate the rate of C release from soils as CO2, contributing to alterations in current atmospheric composition, and generating feedbacks to climate change. Yet the magnitude of C loss from tropical soils remains uncertain, partly because we do not fully understand how non-climatic fac

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Wiseman, Heather Marie. "Quantifying the Ecosystem Role of a Suspension and a Facultative Deposit Feeding Bivalve in the New River Estuary, NC: with Responses to Changes in Nutrient and Sediment Inputs." W&M ScholarWorks, 2010. https://scholarworks.wm.edu/etd/1539617894.

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Hinshaw, Sarra Evelyn. "Denitrification and Greenhouse Gas Fluxes in Subtropical Riparian Zones." Thesis, Griffith University, 2008. http://hdl.handle.net/10072/366356.

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Because of their position in the landscape, riparian zones can function as a buffer between waterways and excess nutrient inputs from the terrestrial environment. Riparian zones have the potential to remove large amounts of nitrate through the process of denitrification. Denitrification is considered a permanent removal of N because nitrate is transformed into N2O and N2. While removal of nitrate via denitrification can improve water quality, there are potential negative effects of denitrification because N2O is a greenhouse gas. Understanding controls on whether denitrification results in N2O

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41

Zweynert, Ulrike. "Möglichkeiten und Grenzen bei der Modellierung von Nährstoffeinträgen auf Flussgebietsebene." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1239967648045-37533.

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Modelle werden eingesetzt, um Menge und Herkunft der Stoffeinträge auf Flussgebietsebene zu analysieren. Aus den Ergebnissen der Modellierung lassen sich Handlungsempfehlungen zur Verbesserung der Gewässergüte ableiten. Für die Interpretation der Modellergebnisse sind Kenntnisse über die Genauigkeit und Aussagekraft der Ergebnisse notwendig. Das Modell MONERIS als konzeptionelles Modell für die Anwendung auf Flussgebietsebene wurde innerhalb der vorliegenden Arbeit in 5 europäischen Flusseinzugsgebieten angewandt. Sowohl mit verschiedenen Ansätzen aufbereitete Abflusswerte als auch unterschied

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Zweynert, Ulrike. "Möglichkeiten und Grenzen bei der Modellierung von Nährstoffeinträgen auf Flussgebietsebene: Untersuchungen am Beispiel des Modells MONERIS." Doctoral thesis, Technische Universität Dresden, 2008. https://tud.qucosa.de/id/qucosa%3A23599.

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Modelle werden eingesetzt, um Menge und Herkunft der Stoffeinträge auf Flussgebietsebene zu analysieren. Aus den Ergebnissen der Modellierung lassen sich Handlungsempfehlungen zur Verbesserung der Gewässergüte ableiten. Für die Interpretation der Modellergebnisse sind Kenntnisse über die Genauigkeit und Aussagekraft der Ergebnisse notwendig. Das Modell MONERIS als konzeptionelles Modell für die Anwendung auf Flussgebietsebene wurde innerhalb der vorliegenden Arbeit in 5 europäischen Flusseinzugsgebieten angewandt. Sowohl mit verschiedenen Ansätzen aufbereitete Abflusswerte als auch unterschied

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43

Dincher, Marie. "Dynamique comparée des éléments majeurs dans les humus de forme mull dans une hêtraie du Nord-Est de la France." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0170.

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L’humus est le siège de processus clés pour la nutrition des arbres. Cependant, il reste un compartiment de l’écosystème encore peu étudié pour l’ensemble des nutriments et éléments bénéfiques autre que C et N. Ainsi, dans un contexte où les pressions exercées sur les forêts augmentent depuis quelques années, il est important de comprendre la dynamique comparée des éléments de leur arrivée dans l’humus à leur sortie dans le sol. Les objectifs de cette thèse sont (1) d’identifier les mécanismes et les facteurs responsables de la dynamique des éléments majeurs (C, N, P, K, Ca, Mg, Mn, S, Si, Al

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Mcgowan, Marc P. "Submarine Groundwater Discharge: Freshwater And Nutrient Input Into Hawaii's Coastal Zone." Thesis, 2004. http://hdl.handle.net/10125/10466.

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Jian, Jin Sheng, and 焦金勝. "Chemostat delay equation with periodic input nutrient for two comprting species." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/64348552336988882202.

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Scheile, Thorsten. "Effect of plant and animal functional traits on nutrient cycling in low-input pastures." Doctoral thesis, 2017. http://hdl.handle.net/11858/00-1735-0000-002E-E49E-1.

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"Improving Snap Bean (Phaseolus vulgaris L.) Production under Reduced Input Systems." Thesis, 2015. http://hdl.handle.net/10388/ETD-2015-10-2067.

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Snap bean (Phaseolus vulgaris L.) production by large scale commercial producers in Ethiopia is under intensive production and relies on high rates of nitrogen (N) fertilizer and irrigation during the dry season. Despite increasing interest to produce this crop, small scale farmers cannot afford the high cost of N fertilizer. Field and greenhouse experiments were conducted to test snap bean production under a low input production system better suited to small scale resource limited farmers. Field experiments were conducted in 2011 and 2012 under rain fed conditions, and in 2012 under irrigati

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Ding, Shih-Bin, and 丁世彬. "The Impact of Agricultural Activities on Nutrient Input-Output at Alpine Forest Ecosystems in Central Taiwan." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/43871916284052814871.

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碩士<br>國立彰化師範大學<br>地理學系<br>96<br>Lishan area is the major mountain agriculture region in Taiwan. The impact of the intense agricultural activities on high-elevation ecosystems has not been carefully examined. Studies of nutrient input-output are good ways of evaluating ecosystem’s function and health conditions. This study examined weekly bulk deposition and streamwater chemistry at Piluchi Experimental Forest and monthly streamwater chemistry at Herhuanchi together with a previous study to evaluate dynamics of nutrient input-out to evaluate the effect of mountain agriculture on high-elevation

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Hartwig, Melanie. "Impact of fine sediment and nutrient input on the hyporheic functionality:: A case study in Northern Mongolia." Doctoral thesis, 2015. https://tud.qucosa.de/id/qucosa%3A30243.

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The hyporheic interstitial was recognized as an integral zone within the aquatic ecosystem bearing important functions for both adjacent compartments, surface and ground water, about 50 years ago. Since then, rather disciplinary works gained knowledge on the organismic community of this ecotone, its spatial extent, the role of distinct parameters such as hydrology and morphology, temporal characteristics, process dynamics, the role for stream or groundwater quality and restoration measures. However, a systematic study on the risks to the hyporheic functions was missing to date. This thesis co

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Müller, Anke Katrin. "Soil greenhouse gas fluxes under elevated nutrient input along an elevation gradient of tropical montane forests in southern Ecuador." Doctoral thesis, 2014. http://hdl.handle.net/11858/00-1735-0000-0023-9920-3.

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Los suelos de los bosques tropicales desempeñan un papel importante en el clima de la Tierra mediante el intercambio con la atmosfera de grandes cantidades de gases de efecto invernadero (GEI). Sin embargo, esta importante función podría ser alterada por las actividades humanas causando el aumento en la deposición de nutrientes en los ecosistemas terrestres, especialmente en las regiones tropicales. Las causas de cómo el incremento de las cantidades de nutrientes está afectando los flujos de suelo de los GEI de los bosques tropicales es relativamente poco conocida, por ello los monitoreos de n

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