Tesis sobre el tema "Soil microorganisms"
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Ezzi, Mufaddal I. "Cyanide detoxification by soil microorganisms". Thesis, University of Surrey, 2001. http://epubs.surrey.ac.uk/842816/.
Texto completoJames, Phillip. "Towards the biogeography of British soil microorganisms". Thesis, University of Newcastle Upon Tyne, 2013. http://hdl.handle.net/10443/1840.
Texto completoLi, Ying. "Fluorescence microscopic observations of microorganisms in soil". The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1283178984.
Texto completoCruz, Juliana Cristina Sodário [UNESP]. "Aspectos microbiológicos e químicos em solo submetido à solarização". Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/97234.
Texto completoA técnica de solarização vem sendo utilizada em pequenas propriedades como uma alternativa de substituição de defensivos agrícolas no controle de fitopatógenos, insetos, plantas daninhas e nematóides de solo. Desta forma, instalou-se um experimento em condições de campo, numa área da Fazenda Experimental Lageado, campus da UNESP no município de Botucatu – SP (latitude 22°51’S e longitude 48°26’W) para se avaliar o impacto desta técnica sobre a comunidade microbiana de um solo caracterizado como Latossolo Vermelho Distrófico, textura média. Inicialmente, incorporou-se uma fonte de matéria orgânica ao solo (couve Brassica oleraceae var. acephala L. fresca e triturada) na quantidade de 4kg.m-2. Posteriormente, umedeceu-se o mesmo e cobriu-se com filme plástico transparente de polietileno aditivado com 150mm de espessura. Fez-se vedação lateral de cada parcela, para se evitar a dispersão de gases e aumentar-se o efeito térmico natural. O experimento obedeceu a delineamento fatorial 2x2x4 (solo solarizado e não solarizado x com e sem incorporação de couve x épocas de coleta). Os tratamentos foram: a)adição de couve sem solarização; b)solarização e adição couve; c)testemunha, sem adição de couve e sem solarização; d)solarização sem adição de couve, com três repetições cada tratamento... .
The soil solarization technique has been used in small properties as an alternative to substitute chemical defensives for phytopathogens, insects, damage causing plants and soil nematode control. A field condition experiment was carried out in an area of Faculdade de Ciências Agronômicas - Botucatu - SP - Brazil (latitude 22°51’S and longitude 48° 26’ W) in order to evaluate the technique impact on the microbial community of soil characterized as Distrofic Red Latosoil, medium texture. Initially, a source of organic material was incorporated to the soil (kale- Brassica oleraceae var acephala L. fresh and ground) in the amount of 4 kg.m-2. After that, it was moisturized a covered with transparent additivated polyethylene plastic film 150mm tick. Lateral sealing of each alloment was made, in order to avoid gas dispersal and to increase natural thermal effect. The experiment followed a 2x2x4 factorial outline (solarized and non solarized soil x with and without kale incorporaton x four times of harvest). The treatments were: a) addition of kale incorporation; b) solarization and addition of kale; c) witness, without addition of kale and without solarization; d) solarization without addition of kale; with three repetitions of each treatment. Samples composed of soil from each allotment were collected from 0-10cm deep, with the first collecting performed seven days after the experiment implantation in the field, and the further ones as intervals of 14 days, from January to March 2001, being afterwards taken to the area of Departamento de Produção Vegetal, (Defesa Fitossanitária) for microbiological analysis... (Complete abstract, click electronic address below).
Meyer, Kyle. "The biogeography and functional ecology of tropical soil microorganisms". Thesis, University of Oregon, 2017. http://hdl.handle.net/1794/22289.
Texto completo2019-02-17
Bray, Andrew William. "Mineral weathering and soil formation : the role of microorganisms". Thesis, University of Leeds, 2014. http://etheses.whiterose.ac.uk/6848/.
Texto completoWright, David Andrew. "Protozoan predation of bacteria in soil". Thesis, University of Aberdeen, 1994. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU068158.
Texto completoPalmieri, Celso Tomás [UNESP]. "Avaliação da produção de Co2 em solo incorporado com substrato destinado ao uso agrícola por absorção de radiação infravermelha". Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/91892.
Texto completoCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Este trabalho constitui-se de uma pesquisa multidisciplinar envolvendo física, química, e meio ambiente. Nesta pesquisa foi feito um estudo visando avaliar a absorção de radiação infravermelha da produção de CO2 em solo incorporado com substrato (sementes de aveia amarela, capim-seda, milho, milheto e outros invasores mais inoculação microbiana), com a finalidade de quantificar as emissões deste tipo de solo e as diferenças destas emissões de CO2 com relação à esse mesmo tipo de solo sem a incorporação deste substrato. O material foi coletado na Fundação Mokiti Okada localizada no Município de Ipeúna, interior do Estado de São Paulo SP. O solo retirado foi caracterizado como latossolo vermelho-escuro, argiloso, bem compactado, pouco poroso e com grande capacidade de saturação de água . Foram coletados dois tipos de solos: o solo incorporado com substrato e o não compactado com substrato. Ambos, foram devidamente triturados, peneirados com diâmetro de 2,5 mm e secos na sombra por um período de 12 dias e acondicionados em 12 vasos de cerâmica. Seis desses vasos continham solos não tratados com substrato e seis solos tratados com o substrato acima mencionado. Em cada vaso foi colocado uma quantia de 5.000 mL de solo, onde os mesmos foram umedecidos um dia antes da coleta dos dados. Os vasos receberam 1.200 mL de água, valor este gerado em função da capacidade de campo. No interior de cada vaso foi fixado balde de plástico que através do processo de oxidação da matéria orgânica foi produzido CO2 onde o mesmo foi medido pela câmera respirométrica LI-820 a qual possui leitor ótico infravermelho capaz de medir o fluxo de CO2. Os dados coletados demonstraram que os seis vasos tratados com substratos produziram CO2 em uma proporção muito maior do que os vasos com solos não tratados.
Abstrct: This work is constituted of a research multidisciplinar involving physics, chemistry, and environment. In this research it was made a study seeking to evaluate the absorption of infrared radiation of the production of CO2 in incorporate soil with substratum (seeds of oats yellow, grass-silk, corn, milheto and other invaders more microbial inoculation), with the purpose of quantifying the emissions of this soil type and the differences of these emissions of CO2 regarding to that same soil type without the incorporation of this substratum. The material was collected in the Fundação Mokiti located Okada in the Municipal district of Ipeúna, interior of the State of São Paulo - SP. The solitary soil was characterized as latossolo red-darkness, loamy, well compacted, little porous and with great capacity of saturation of water. Two types of soils were collected: the incorporate soil with substratum and the no compacted with substratum. Both, they were triturated properly, drizzled with diameter of 2,5 mm and dry in the shadow for a period of 12 days and conditioned in 12 ceramic vases. Six of those vases contained soils no treated with substratum and six soils treated with the substratum above mentioned. In each vase an amount of 5.000 soil mL was put, where the same ones were moistened one day before the collection of the data. The vases received 1.200 mL of water, value this generated in function of the field capacity. Inside each vase it was fastened bucket of plastic that through the process of oxidation of the organic matter CO2 was produced where the same was measured by the camera respirométrica READ-820 which possesses infrared optic reader capable to measure the flow of CO2. The collected data demonstrated that the six vases treated with substrata produced CO2 in a much larger proportion than the vases with soils no treated.
Cruz, Juliana Cristina Sodário 1975. "Aspectos microbiológicos e químicos em solo submetido à solarização /". Botucatu : [s.n.], 2003. http://hdl.handle.net/11449/97234.
Texto completoResumo: A técnica de solarização vem sendo utilizada em pequenas propriedades como uma alternativa de substituição de defensivos agrícolas no controle de fitopatógenos, insetos, plantas daninhas e nematóides de solo. Desta forma, instalou-se um experimento em condições de campo, numa área da Fazenda Experimental Lageado, campus da UNESP no município de Botucatu - SP (latitude 22°51'S e longitude 48°26'W) para se avaliar o impacto desta técnica sobre a comunidade microbiana de um solo caracterizado como Latossolo Vermelho Distrófico, textura média. Inicialmente, incorporou-se uma fonte de matéria orgânica ao solo (couve Brassica oleraceae var. acephala L. fresca e triturada) na quantidade de 4kg.m-2. Posteriormente, umedeceu-se o mesmo e cobriu-se com filme plástico transparente de polietileno aditivado com 150mm de espessura. Fez-se vedação lateral de cada parcela, para se evitar a dispersão de gases e aumentar-se o efeito térmico natural. O experimento obedeceu a delineamento fatorial 2x2x4 (solo solarizado e não solarizado x com e sem incorporação de couve x épocas de coleta). Os tratamentos foram: a)adição de couve sem solarização; b)solarização e adição couve; c)testemunha, sem adição de couve e sem solarização; d)solarização sem adição de couve, com três repetições cada tratamento... (Resumo completo, clicar acesso eletrônico abaixo).
Abstract: The soil solarization technique has been used in small properties as an alternative to substitute chemical defensives for phytopathogens, insects, damage causing plants and soil nematode control. A field condition experiment was carried out in an area of Faculdade de Ciências Agronômicas - Botucatu - SP - Brazil (latitude 22°51'S and longitude 48° 26' W) in order to evaluate the technique impact on the microbial community of soil characterized as Distrofic Red Latosoil, medium texture. Initially, a source of organic material was incorporated to the soil (kale- Brassica oleraceae var acephala L. fresh and ground) in the amount of 4 kg.m-2. After that, it was moisturized a covered with transparent additivated polyethylene plastic film 150mm tick. Lateral sealing of each alloment was made, in order to avoid gas dispersal and to increase natural thermal effect. The experiment followed a 2x2x4 factorial outline (solarized and non solarized soil x with and without kale incorporaton x four times of harvest). The treatments were: a) addition of kale incorporation; b) solarization and addition of kale; c) witness, without addition of kale and without solarization; d) solarization without addition of kale; with three repetitions of each treatment. Samples composed of soil from each allotment were collected from 0-10cm deep, with the first collecting performed seven days after the experiment implantation in the field, and the further ones as intervals of 14 days, from January to March 2001, being afterwards taken to the area of Departamento de Produção Vegetal, (Defesa Fitossanitária) for microbiological analysis... (Complete abstract, click electronic address below).
Mestre
Lakzian, Amir. "Diversity and metal tolerance of Rhizobium leguminosarum bv. viciae in soils contaminated with heavy metals". Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287779.
Texto completoMullins, Jane A. "A study of the ecology and taxonomy of Micromonospora in the natural environment". Thesis, University of Warwick, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387354.
Texto completoKim, Sang-Jun. "Bioaugmentation for the remediation of pesticide-contaminated soil with microorganisms directly enriched in soil or compost". Columbus, Ohio : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1062640058.
Texto completoTitle from first page of PDF file. Document formatted into pages; contains xv, 160 p.; also includes graphics. Includes abstract and vita. Advisor: Warren A. Dick, Environmental Science Graduate Program. Includes bibliographical references (p. 135-160).
Means, Nathan. "Effects of glyphosate and foliar amendments on soil microorganisms in soybean /". free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p3164527.
Texto completoClasper, Paula Jeanette. "The effects of paper mill sludge on earthworms and soil microorganisms". Thesis, Lancaster University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429963.
Texto completoGoodfriend, Wendy Lynn 1965. "Exploring a community of saline soil microorganisms: Who, where, and when". Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282313.
Texto completoRoberts, Joanna Elizabeth. "Establishment and microbial activity in relation to gene transfer in soil". Thesis, University of Exeter, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296624.
Texto completoJones, Alwyn Lloyd. "Soil biomass changes induced by selected pesticide application". Thesis, Bangor University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332553.
Texto completoMashreghi, Mansour. "Survival and activity of genetically engineered degradative inocula in soil". Thesis, University of Aberdeen, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302452.
Texto completoPoll, Christian. "Substrate availability affects abundance and function of soil microorganisms in the detritusphere". [S.l. : s.n.], 2008. http://nbn-resolving.de/urn:nbn:de:bsz:100-opus-2565.
Texto completoZhang, Manyun. "Effects of nitrification inhibitor and agrochemicals on soil microorganisms and nitrogen cycling". Thesis, Griffith University, 2018. http://hdl.handle.net/10072/378159.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Environment and Sc
Science, Environment, Engineering and Technology
Full Text
Turk, Colleen Mary 1961. "The effect of microorganisms on soil structure development in copper mine tailing". Thesis, The University of Arizona, 1995. http://hdl.handle.net/10150/291594.
Texto completoCampbell, Graeme Roy. "Community analysis of β-subgroup ammonia in sewage sludge amended soil". Thesis, University of Aberdeen, 2000. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602053.
Texto completoSchnürer, Ylva. "Influence of soil properties and organic pesticides om soil microbial metabolism /". Umeå : Dept. of Forest Ecology, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/2006118.pdf.
Texto completoRapley, Joanne. "Phylogenetic diversity of nifH genes in Marion Island soil". Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_1001_1223535337.
Texto completoThe microbial life of sub-Antarctic islands plays a key role in the islands ecosystem, with microbial activities providing the majority of nutrients available for primary production. Knowledge of microbial diversity is still in its infancy and this is particularly true regarding the diversity of micro-organisms in the Antarctic and sub-Antarctic regions. One particularly important functional group of micro-organisms is the diazotrophs, or nitrogen-fixing bacteria and archaea. This group have not been well studied in the sub-Antarctic region, but play an important role in the nutrient cycling of the island. This thesis explored the diversity of nitrogen-fixing organisms in the soil of different ecological habitats on the sub-Antarctic Marion Island.
Girvan, Martina Susanna. "Pollutant pressure effects on the diversity, stability and function of the soil microbial community". Thesis, University of Aberdeen, 2000. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU142035.
Texto completoMartinho, Ana Rita de Sousa. "Isolamento de microrganismos tolerantes a elementos vestigiais capazes de mobilizar nutrientes". Master's thesis, ISA, 2014. http://hdl.handle.net/10400.5/6871.
Texto completoAbandoned mines are a major problem worldwide, with inherited impacts both upstream and downstream, whose dimension is more than just environmental, as they also influence sociological and economic spheres. Therefore, it is urgent to find viable alternatives to the recover affected soils. However, these extreme environments may also provide a panoply of microorganisms that may be useful in agricultural soils. The inoculation of soils with microorganisms is a technique increasingly addressed in the field of research. Plant growth assays using very specific bacteria – plant growth promoting bacteria (PGPB) – have been tested. In soils with small amounts of phosphorus, especially if rich in iron and aluminum oxides and hydroxides, most of the macronutrient is adsorbed and unavailable to plants. The same is true in alkaline soils with large amounts of calcium. Organic forms of phosphorus are also directly unavailable to plants. Calcium phytate, one of the most abundant forms of organic phosphorus, is insoluble. Soil microorganisms can help plant to acquire phosphorus from the soil by means of several mechanisms, and stimulate plant growth by improving the microbial-plant nutritional status and resistance to plant pathogens. Same bacteria may also tolerate high concentrations of trace elements. The hypothesis tested in this work was that isolates from contaminated mine soils would have a large tolerance to trace elements present in those soils. For this purpose, the tolerance of phosphorus-solubilizing bacteria isolated from the rhizosphere of plants from an abandoned Portuguese mine (S. Domingos mine) to four trace elements (arsenic, lead, copper and zinc) was tested and the ability to promote plant growth was evaluated using maize as the model plant, due to the economic importance of this crop in the national context and because its growth is rapid, which from the point of view of the laboratory tests becomes an asset. The total number of bacteria able to grow in rich media or in minimal media with the different sources of phosphorus was evaluated. The results showed that the greater value in rich media was obtained in the uncontaminated soil and the smallest value in the mine soil with the lowest pH and with large total contents of lead and arsenic. Isolates that formed a halo in calcium phosphate or calcium phytate were then tested in the presence of different levels of copper, zinc, lead and arsenic. The solubilization efficiency was diverse, and the tolerance to different concentrations of trace elements also varied between isolates, with better results obtained with arsenic, generally. The study in hydroponics showed the capacity of bacterial isolates to promote plant growth highlighting the importance of the interaction plant-bacteria. In conclusion, it was possible, under laboratory conditions, to obtain isolates with ability to tolerate different trace elements, in different concentrations, and able to promote plant growth. The results suggest that it may be possible to use some of the isolates under field conditions as inoculants for agricultural soils.
Muirhead, Richard William y n/a. "The association of Escherichia coli and soil particles in overland flow". University of Otago. Department of Food Science, 2006. http://adt.otago.ac.nz./public/adt-NZDU20070306.155953.
Texto completoJouini, Amira. "Herbicidal activity of Mediterranean essential oils and their effects on soil bioindicators". Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/159914.
Texto completo[CA] Les preocupacions ambientals i de salut han estimulat l'interès per estratègies alternatives de gestió de les males herbes. A tot el món, s'estan fent esforços per reduir la gran dependència dels herbicides sintètics que s'utilitzen com a principal mètode per al control de les males herbes. Els herbicides naturals basats en substàncies al·lelopàtiques, com els olis essencials (OEs) extrets de plantes, s'han suggerit com una de les alternatives possibles per aconseguir una gestió sostenible de les males herbes. Els OEs han mostrat capacitat per inhibir la germinació i el creixement de llavors de males herbes, però per altra banda, falten estudis sobre els efectes d'aquestes substàncies sobre els microorganismes del sòl. En aquesta tesi es van investigar les activitats fitotòxiques i herbicides dels OE extrets d'herbes mediterrànies per a un ús potencial com a herbicides naturals. A més, es van provar els efectes d'aquests OE i d'altres extractes vegetals, com hidrolats, extractes aquosos i fulles fresques obtingudes d'herbes mediterrànies sobre els microorganismes del sòl. Les espècies donants d'OEs es van seleccionar bassant-se en la experiencia previa del grup d'investigació i en la bibliografía existent sobre les activitats biològiques dels metabòlits secundaris d'aquestes espècies: Eucalyptus camaldulensis Dehnh., Eucalyptus occidentalis Endl., Eucalyptus globulus Labill., Eucalyptus torquata Luehm., Eucalyptus lesoufii Maiden, Thymbra capitata (L.) Cav., Mentha × piperita L. i Santolina chamaecyparissus L. Les males herbes objectiu seleccionades van ser dos monocotiledóneas, Avena fatua L. i Echinochloa crus-galli (L.) P. Beauv. i dos dicotiledóneas, Portulaca oleracea L. i Amaranthus retroflexus L. La composició dels OEs es va analitzar mitjançant Cromatografia de gasos (CG) i Cromatografia de gasos-espectrometria de mases (CG-EM). Els assajos in vitro es van realitzar en cambres de germinació per avaluar els efectes dels OEs sobre la germinació i el creixement de les plàntules. Els assajos in vivo es van realitzar en condicions d'hivernacle, on es van aplicar per reg els OEs emulsionats amb Fitoil a les males herbes. L'estudi dels efectes dels OEs sobre els microorganismes del sòl es van realitzar en un experiment en tiestos en condicions de laboratori, en el qual els sòls van ser tractats amb els OEs i els extractes de fulles i després van ser incubats a temperatura ambient (20-23 ° C). Els resultats dels assaigs in vitro van revelar que tots els OE van mostrar efectivitat contra les males herbes objectiu. Entre tots ells, T. capitata va ser el més eficaç. A dosis més baixes, va bloquejar completament la germinació de tots les llavors. Els assaigs en hivernacle van demostrar l'activitat herbicida de T. capitata, M. piperita i S. chamaecyparissus, augmentant la seva fitotoxicitat amb la dosi. T. capitata va ser l'OE més eficaç contra totes les males herbes a la dosi màxima i P. oleracea va ser la mala herba més resistent. Els microorganismes del sòl, després d'un període de trastorn transitori, en general van recuperar la seva funció inicial i la seva biomassa. Només l'oli de T. capitata, a la dosi més alta no va permetre als microorganismes del sòl recuperar completament la seva funcionalitat inicial. Els resultats de l'aplicació d'extractes de fulles al sòl van demostrar que les fulles d'eucaliptus i els seus extractes (OEs, hidrolats i extractes aquosos), afecten la comunitat microbiana del sòl de diferents maneres, depenien de les espècies d'eucaliptus. Fins ara, els resultats obtinguts fan possible suggerir l'aplicació d'EOs com a bioherbicides en entorns controlats com l'horticultura i en condicions d'hivernacle, però s'ha d'identificar la dosi òptima d'aplicació per controlar les males herbes i simultàniament, no afectar negativament els microorganismes del sòl.
[EN] Environmental and health concerns caused for traditional crop protection systems have stimulated interest in alternative weed management strategies. Worldwide, efforts are being made to reduce the heavy reliance on synthetic herbicides that are used to control weeds. Natural herbicides based on allelopathic substances, such as volatile essential oils (EOs) extracted from plants, has been suggested to be one of the possible alternatives for achieving sustainable weed management. From one hand, EOs have shown ability to inhibit weeds seed germination and growth, on the other hand there is a lack of studies about the effects of such substances on soil microorganisms. Therefore, in this thesis the phytotoxic and herbicidal activities of EOs extracted from Mediterranean plants were investigated for their potential use as natural herbicides. The effects of EOs, as well as, of other plant extracts, such as hydrolates, aqueous extracts and fresh leaves obtained from Mediterranean plants, were tested on soil microorganisms. The donor species of EOs were selected based on previous experience of the research group and according to the current literature about the herbicidal activities of the secondary metabolites of these species or from species that are taxonomically closely related: Eucalyptus camaldulensis Dehnh., Eucalyptus occidentalis Endl., Eucalyptus globulus Labill., Eucalyptus torquata Luehm., Eucalyptus lesoufii Maiden, Thymbra capitata (L.) Cav., Mentha × piperita L. and Santolina chamaecyparissus L. The target weeds were two monocotyledons, Avena fatua L. and Echinochloa crus-galli (L.) P. Beauv, and two dicotyledons, Portulaca oleracea L. and Amaranthus retroflexus L. EOs composition was analyzed by means of Gas Chromatography (GC) and Gas Chromatography-Mass Spectrometry (GC-MS). The in vitro assays were performed in germination chambers, to assess the effects of EOs on weed seed germination and seedling growth. The in vivo trials were conducted in greenhouse conditions, where EOs emulsified by Fitoil were applied on weed species by watering. The study of EOs effects on soil microorganisms was carried out in a laboratory pot experiment, where soils were treated with EOs and leaf extracts and then incubated at room temperature (20-23°C). Results obtained from the in vitro bioassays revealed that all used EOs displayed of effectiveness against assayed weeds, controlling completely their germination process or reducing it and significantly inhibiting their seedling growth. Among them, T. capitata was the most effective. At lower doses, it blocked completely the seed germination of A. retroflexus, P. olecerea, A. fatua and E. crus-galli. Greenhouse trials demonstrated herbicidal activity of T. capitata, M. piperita and S. chamaecyparissus, increasing their phytotoxicity with the dose. T. capitata was the most effective against all weeds at the maximum dose and P. oleracea was the most resistant weed. Soil microorganisms, after a transient upheaval period, induced by the addition of EOs, generally recovered their initial function and biomass. Only T. capitata EO at the highest dose did not allow soil microorganisms to completely recover their initial functionality. Results of leaf extracts application on soil provided evidence that Eucalyptus leaves and their extracts (EOs, hydrolates and aqueous extracts), affected soil microbial community in different ways, and those effects were dependent on the Eucalyptus species. So far, the results obtained make feasible to suggest EOs application as bio-herbicides in controlled environments, such as horticulture and in greenhouse conditions. However, the optimum dose of application must be determined, to control weeds and simultaneously, not negatively affect soil microorganisms.
Jouini, A. (2020). Herbicidal activity of Mediterranean essential oils and their effects on soil bioindicators [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/159914
TESIS
Page, Susan. "Immunological and cultural techniques for determining numbers and activity of microorganisms inoculated into soil". Thesis, University of Kent, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359245.
Texto completoAdhikari, Deepak. "Microbial response to different carbon source amendments in agricultural soils as monitored by culture-independent techniques". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 127 p, 2008. http://proquest.umi.com/pqdweb?did=1605142671&sid=3&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Texto completoLee, Nathan Robert William. "Long Term Glyphosate Effects on Roundup Ready Soybean Rhizosphere Microorganisms". The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1525689141453883.
Texto completoBach, Elizabeth Marie. "Biotic and Abiotic Drivers of Soil Microbial Community Recovery and Ecosystem Change during Grassland Restoration". Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1967908731&sid=2&Fmt=2&clientId=1509&RQT=309&VName=PQD.
Texto completoLynch, Derek H. (Derek Henry). "Low root-zone temperatures and soybean (Glycine max (L.) Merr.) N2- fixing symbiosis development". Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56677.
Texto completoStanley, Lynn. "A characterization of bacteria populations from two sites /". free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9924929.
Texto completoRocha, Mariana de Melo [UNESP]. "Parâmetros microbiológicos no sistema de plantio direto e convencional em solos com diferentes teores de argila". Universidade Estadual Paulista (UNESP), 2002. http://hdl.handle.net/11449/101744.
Texto completoFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
O manejo agrícola altera, em muito, as características físicas, químicas e biológicas dos solos. A cultura e as condições climáticas, assim como o tipo de solo propriamente dito, afetam a decomposição da matéria orgânica do solo e, consequentemente, a biogeociclagem dos nutrientes. A matéria orgânica é uma característica importante em relação à fertilidade do solo, de modo que o impacto do uso do solo precisa ser avaliado principalmente em agroecossistemas. O conhecimento dos efeitos do uso da terra e das práticas agrícolas sobre a comunidade microbiana é de fundamental importância, em vista das importantes funções que os microorganismos desempenham no solo e que irão se refletir na produtividade agrícola. Neste sentido, uma avaliação da biomassa microbiana e de microorganismos do solo pode evidenciar diversas alterações no ecossistema do solo que estão associadas ao teor de argila e/ou sistemas de plantio. No presente estudo, caracterizou-se a camada superficial do perfil de solos sob plantio direto e plantio convencional em quatro fazendas no Brasil em relação a alguns de seus componentes microbiológicos. Para tanto, analisou-se, mensalmente, a respiração do solo, a biomassa microbiana e grupos de microorganismos. A avaliação da biomassa microbiana foi feita através da técnica da fumigação-incubação (FI), utilizando-se a Equação: [(C-CO2 liberado pelo solo fumigado, no período de 0-10 dias de incubação) - (C-CO2 liberado pelo solo não-fumigado, ao longo de 10-20 dias de incubação)]/0,45. Os cálculos indicaram um conteúdo de carbono da biomassa microbiana significativamente maior nos solos sob sistema de plantio direto em relação àqueles sob plantio convencional, na camada amostrada (0-10 cm de profundidade). Quantidades significativamente maiores...
The crop management changes greatly the physical, chemical and biological soil properties. Furthermore, the crop and soil types, and the climatic conditions would affect on soil organic matter decomposition and on nutrients biogeociclying. Soil organic matter is a important characteristic in relationship soil fertility. The knowledge about effects on soil using and agriculture practices on soil microbial communities is very important, due to the function that microorganisms have in soil and it was going to in soil fertility. In this sense, evaluation of the soil microbial biomass and micro-organisms greatly aids predictions several changes in the soil ecosystems are associated with reduced tillage as compared with conventional tillage. Surface soils from long-term no-till and conventional tillage plots at four Brazil farms were characterised for microbial components. Soil respiration, microbial biomass carbon and counts of microorganisms were measured at intervals monthly. The evaluation of microbial biomass carbon was done by fumigation-incubation technique (FI). For calculating the soil microbial biomass carbon, the equation used was: Equation = [(CO2-C evolved by fumigated soil, 0-10 days) - (CO2-C evolved by unfumigated soil, 10-20 days)]/0,45. Significantly greater amounts of CO2-C were released from no-till than from conventional tilled soils. qCO2 values were not significantly different between tillage systems. This observation confirms that the tillage affected biological activity in those soils, further that qCO2 values didn't have significantily different which two tillage systems, in studied soils. Number both fungi and bacteria were assayed by Most Probable Number (MPN) by the agar drop counting technique and the microorganisms groups were calculated using by traditional Most Probable Number (MPN) method...(Complete abstract, click electronic access below)
Van, Zwieten Lukas. "Enhanced biodegradation of phenoxyacetate and triazine herbicides by plant-microbial rhizoplane associations and adapted soil microorganisms". Thesis, The University of Sydney, 1995. https://hdl.handle.net/2123/26900.
Texto completoBuchheim, Caitlin M. "DIGESTION PROCESS IN LUBMRICUS TERRESTRIS ALTERS MICROBIAL ENZYME PRODUCTION AND SOIL NUTRIENTS". Miami University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=miami1578657686503075.
Texto completoClark-Cuadrado, Cristina. "Effects of a switchgrass buffer strip on soil microorganisms near a field applied with endosulfan". FIU Digital Commons, 2007. http://digitalcommons.fiu.edu/etd/2379.
Texto completoBall, Jihane Sokhn. "The effect of heavy metals on the degradation of polycyclic aromatic hydrocarbons by soil microorganisms". Thesis, University of Surrey, 2005. http://epubs.surrey.ac.uk/842888/.
Texto completoNewby, Deborah Trishelle. "An evaluation of soil bioaugmentation with microorganisms bearing plasmidpJP4: Plasmid dissemination and impact on remediation". Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/289103.
Texto completoHe, Jizheng y n/a. "Molecular Biological Studies of Soil Microbial Communities Under Different Management Practices in Forest Ecosystems of Queensland". Griffith University. Australian School of Environmental Studies, 2005. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20060309.095702.
Texto completoRana, Dangi Sadikshya. "Recovery of soil microbial communities after disturbance fire and surface mining /". Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1663059791&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.
Texto completoHe, Jizheng. "Molecular Biological Studies of Soil Microbial Communities Under Different Management Practices in Forest Ecosystems of Queensland". Thesis, Griffith University, 2005. http://hdl.handle.net/10072/367075.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
Australian School of Environmental Studies
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Sauvadet, Marie. "Impacts de la qualité et quantité des résidus de culture sur la structure et le fonctionnement des communautés du sol. Application aux systèmes de grandes cultures du Nord-Est de la France". Thesis, Reims, 2016. http://www.theses.fr/2016REIMS041.
Texto completoCrop residues decomposition is an essential process in cultivated lands since it constitutes the main source of organic matter in these systems. Although the underlying mechanisms of residues degradation of varying qualities and quantities are well-known, their consequences on soil biota and the related functions are less understood. To better understand this process, we chose to follow at key steps of decomposition the evolution of major components of soil diversity (microorganisms, nematodes, micro-arthropods and macrofauna), the evolution of litter quality, the main carbon (C) and nitrogen (N) fluxes and enzyme activities associated, for different quantities and qualities of litter added. The experiments were set up at different spatial and temporal scales (field, mesocosm and microcosm experiments) in function of our objectives.Litter quantity and quality have distinct effects on soil biota. Litter quantity influences the detritivores, and litter quality influences more generally the main functional groups. Labile litter impacts more the bacterial energy channel and the macrodetritivores at the first stages of decomposition, and recalcitrant litter impacts more the fungal energy channel and the mesodetritivores at the latter stage of decomposition. These evolutions are mirrored by the enzymatic dynamics. More specifically, fauna top-down regulations (L.terrestris and nematodes manipulations) exhibit high effects on soil enzymes. Similarly, soil micro-food web initial composition drives enzymatic dynamics. Contrastingly, litter C mineralization depends mainly on its initial quality. This PhD shows the importance of litter management on the biological functions of cultivated soils. Varying litter quality and quantity appear as a mean to influence soil health and some ecosystem services on the long term
Schmitz, Bradley William. "Reduction of Enteric Pathogens and Indicator Microorganisms in the Environment and Treatment Processes". Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/612535.
Texto completoMunier-Lamy, Colette. "Mobilisation et préconcentration de l'uranium dans les sols : Rôle des substances hymiques". Nancy 1, 1987. http://www.theses.fr/1987NAN10220.
Texto completoAhmed, Engy. "Microbe-mineral interactions in soil : Investigation of biogenic chelators, microenvironments and weathering processes". Doctoral thesis, Stockholms universitet, Institutionen för geologiska vetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-115250.
Texto completoAt the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: In press. Paper 3: In press.
Andersson, Stefan. "Influence of liming substances and temperature on microbial activity and leaching of soil organic matter in coniferous forest ecosystems /". Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5850-1.pdf.
Texto completoAhmed, Engy. "The interaction between microbes, siderophores and minerals in podzol soil". Licentiate thesis, Stockholms universitet, Institutionen för geologiska vetenskaper, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-89319.
Texto completoNorman, Jeffrey Stancill. "Environmental controls on the abundance, diversity, growth, and activity of ammonia-oxidizing microorganisms in temperate forest soils". Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/54596.
Texto completoPh. D.