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| Registros recuperados: 29 | |
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| Sutton, Jill N.; Andre, Luc; Cardinal, Damien; Conley, Daniel J.; De Souza, Gregory F.; Dean, Jonathan; Dodd, Justin; Ehlert, Claudia; Ellwood, Michael J.; Frings, Patrick J.; Grasse, Patricia; Hendry, Katharine; Leng, Melanie J.; Michalopoulos, Panagiotis; Panizzo, Virginia N.; Swann, George E. A.. |
| Silicon (Si) is the second most abundant element in the Earth's crust and is an important nutrient in the ocean. The global Si cycle plays a critical role in regulating primary productivity and carbon cycling on the continents and in the oceans. Development of the analytical tools used to study the sources, sinks, and fluxes of the global Si cycle (e.g., elemental and stable isotope ratio data for Ge, Si, Zn, etc.) have recently led to major advances in our understanding of the mechanisms and processes that constrain the cycling of Si in the modern environment and in the past. Here, we provide background on the geochemical tools that are available for studying the Si cycle and highlight our current understanding of the marine, freshwater and terrestrial... |
| Tipo: Text |
Palavras-chave: C - N - O - Si isotopes; Biogenic silica; Element/Si ratios; Biogeochemical cycles; Silicon. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00431/54217/55547.pdf |
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| Souza,Renato Ferreira de; Ávila,Fabrício William; Faquin,Valdemar; Pozza,Adélia Aziz Alexandre; Carvalho,Janice Guedes; Evangelista,Antônio Ricardo. |
| Silicates can be used as soil correctives, with the advantage of being a source of silicon, a beneficial element to the grasses. However, high concentrations of silicon in the plant would affect the digestibility of the forage. To evaluate the influence of the substitution of the calcium carbonate by calcium silicate on the nutrition, biomass production and the feed quality of the palisade grass [Urochloa brizantha (C. Hochstetter ex A. Rich.) R. Webster], three greenhouse experiments were conducted in completely randomized designs with four replications. Experimental units (pots) contained a clayey dystrophic Rhodic Haplustox, a sandy clay loam dystrophic Typic Haplustox and a sandy loam dystrophic Typic Haplustox. Each soil received substitution... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Urochloa brizantha; Pasture; Lime; Silicon; Feed value. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500003 |
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| Tokura, Alessandra Mayumi; Uniderp; Furtini Neto, Antonio Eduardo; UFLA; Carneiro, Leandro Flávio; UFLA; Curi, Nilton; UFLA; Santos, José Zilton Lopes; UFLA; Alovisi, Alves Alexandre; SNP Consultoria. |
| O experimento foi conduzido com o objetivo de avaliar a influência da aplicação de silício (Si) e fósforo (P) sobre as formas orgânicas e inorgânicas do P em dois solos (Neossolo Quartzarênico órtico e Latossolo Vermelho distroférrico – LVdf), com textura e mineralogia distinta, antes e após o cultivo do arroz. O experimento foi realizado utilizando-se esquema fatorial, sendo quatro doses de P e três doses de Si. A fertilização fosfatada alterou as formas lábeis de P, enquanto as formas pouco lábeis apresentaram comportamento dependentes da textura e mineralogia. A aplicação do Si apresentou-se promissora em aumentar a disponibilidade de P para as plantas de arroz. |
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Palavras-chave: 5.01.00.00-9 Agronomia fertilização fosfatada e silicatada; Ânions; Fracionamento de P. phosphated fertilization; Silicon; Anions; P fractionation.. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/1435 |
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| López Guisa, Daniel. |
| La cenicilla y mildiu del rosal son las enfermedades más comunes que los productores deben controlar en invernadero en Villa Guerrero, México. El silicio (Si) se planteó como estrategia alternativa para control de dichas enfermedades. Los objetivos fueron: verificar la especie de cenicilla y mildiu, establecer un experimento en hidroponía para evaluar el control de cenicilla por el uso de Si en la solución nutritiva del rosal, evaluar el efecto de fitotoxicidad por Si y por ultimo determinar si el Si controla la cenicilla y el mildiu al ser asperjado foliarmente y qué efecto tiene sobre el rendimiento. Se confirmó a Podosphaera pannosa como la especie de cenicilla y a Peronospora sparsa, mildiu. En el caso de cenicilla, se obtuvieron dos secuencias... |
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Palavras-chave: Control; Peronospora sparsa; Podosphaera pannosa; Rosa spp.; Silicio; Silicon; Fitopatología; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2203 |
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| Luz,Pedro Henrique de Cerqueira; Faria,Letícia de Abreu; Macedo,Felipe Barros de; Herling,Valdo Rodrigues; Sanches,Antonio Batista; Rodrigues,Rosane Cláudia. |
| Application of calcium silicate (SiCa) as soil acidity corrective was evaluated in a Rhodic Hapludox soil with palisade grass conducted under pasture rotation system with different grazing intensities. Experimental design was complete randomized blocks with four grazing intensities - grazing intensities were imposed by forage supply (50, 100, 150 and 200 kg t-1 of DM per LW) - in experimental plots with four replicates and, in the subplots, with seven doses of calcium silicate combined with lime: 0+0, 2+0, 4+0, 6+0, 2+4, 4+2 and 0+6 t ha-1, respectively. In the soil, it was evaluated the effect of four levels of calcium silicate (0, 2, 4 and 6 t ha-1) at 45, 90, and 365 days at three depths (0-10, 10-20 and 20-40 cm) and at 365 days, it was included one... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calcium silicate; Forage; Limestone; Silicon. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700009 |
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| Crusciol,Carlos Alexandre Costa; Foltran,Rodrigo; Rossato,Otavio Bagiotto; McCray,James Mabry; Rossetto,Raffaella. |
| Lime application recommendations for amendment of soil acidity in sugarcane were developed with a burnt cane harvesting system in mind. Sugarcane is now harvested in most areas without burning, and lime application for amendment of soil acidity in this system in which the sugarcane crop residue remains on the ground has been carried out without a scientific basis. The aim of this study was to evaluate the changes in soil acidity and stalk and sugar yield with different rates of surface application of calcium, magnesium silicate, and gypsum in ratoon cane. The experiment was performed after the 3rd harvest of the variety SP 81-3250 in a commercial green sugarcane plantation of the São Luiz Sugar Mill (47º 25' 33" W; 21º 59' 46" S), located in Pirassununga,... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Soil acidity correction; Silicon; Stalk and sugar yield; Green sugarcane. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000600019 |
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| Baronas, J. Jotautas; Torres, Mark A.; West, A. Joshua; Rouxel, Olivier; Georg, Bastian; Bouchez, Julien; Gaillardet, Jerome; Hammond, Douglas E.. |
| Solutes derived from the dissolution of silicate minerals play a key role in Earth’s climate via the carbon and other biogeochemical cycles. Silicon (Si) is a unique constituent of silicate minerals and a biologically important nutrient, so tracing its behavior in near-surface environments may provide important insights into weathering processes. However, Si released by weathering is variably incorporated into secondary mineral phases and biota, obscuring signals derived from primary weathering processes. Due to chemical similarities, Germanium (Ge) may help better understand the Si cycle and its relationship to chemical weathering. With this aim, we report new measurements of the concentration and isotopic composition of Ge for both the dissolved and... |
| Tipo: Text |
Palavras-chave: Germanium; Silicon; Isotopes; Rivers; Weathering; Fractionation. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00460/57196/59370.pdf |
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| Jesus,Edmar G. de; Fatima,Reynaldo T. de; Guerrero,Amaralina C.; Araújo,Josinaldo L. de; Brito,Marcos E. B.. |
| ABSTRACT The objective of this article was to study the growth and gas exchange of arugula plants under silicon (Si) fertilization and water stress. The experiment was installed in a greenhouse, located in the municipality of Pombal, PB, Brazil, whose geographic coordinates are 6º 46 ‘S latitude and 37º 49’ W longitude and 178 m of altitude, situated in the 'Sertão Paraibano' micro-region. The experimental design was in randomized blocks, in 5 x 2 factorial scheme, corresponding to five Si doses (0, 50, 100, 150 and 200 mg L-1) and two irrigation depths [50 and 100% of real evapotranspiration (ETr) based on weighing lysimeter], with four replicates. Silicon application was performed as foliar spray, using a commercial product composed of 0.75% Si and 0.15%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eruca sativa Miller; Water use efficiency; Silicon. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000200119 |
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| Pereira,Alexandre Igor A; Guimarães,João de Jesus; Costa,João Victor; Cantuário,Fernando S de; Salomão,Leandro C; Oliveira,Roberta C de; Luz,José Magno Q. |
| ABSTRACT Water stress compromises plant growth. Resistance inducers, such as potassium silicate (K2SiO3), can reduce negative effects of this stress on Solanaceae, Capsicum annuum. Plant height, stem diameter and leaf area may indicate the efficiency of potassium silicate foliarsprayagainst water stress. The aim of this study was to evaluate the growth of sweet pepper plants under water stress and K2SiO3 doses. The experiment was conducted in randomized blocks in a split-plot scheme in space. The treatments consisted of four soil water stresses: 15 kPa (field capacity), 25 (intermediate value), 35 and 45 kPa (water stress) and three doses of potassium silicate (0, 0.4 and 0.8 L 100 L-1 water), acting as resistance inducers to water stress. The resistance... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum annuum; Solanaceae; Water stress; Silicon. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000100082 |
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| Del Amo, Yolanda; Le Pape, Olivier; Treguer, Paul; Queguiner, Bernard; Menesguen, Alain; Aminot, Alain. |
| The chemical factors (inorganic nitrogen, phosphate, silicic acid) that potentially or actually control primary production were determined for the Bay of Brest, France, a macrotidal ecosystem submitted to high-nitrate-loaded freshwater inputs (winter nitrate freshwater concentrations >700 mu M, Si:N molar ratio as low as 0.2, i.e. among the lowest ever published). Intensive data collection and observations were carried out from February 1993 to March 1994 to determine the variations of physical [salinity, temperature, photosynthetically active radiation (PAR), freshwater discharges] and chemical (oxygen and nutrients) parameters and their impacts on the phytoplankton cycle (fluorescence, pigments, primary production). With insufficient PAR the winter... |
| Tipo: Text |
Palavras-chave: Coastal ecosystem; Phytoplankton dynamics; Macrotidal; Nutrient limitation; Silicon; Eutrophication. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00337/44782/44588.pdf |
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| Korndörfer,AP; Grisoto,E; Vendramim,JD. |
| Changes in the agroecosystem with the increase of green cane harvesting in Brazil affected the insect populations associated to this crop, and secondary pests like the spittlebug Mahanarva fimbriolata Stål, became much more important. Many studies have demonstrated the active role played by silicon in plant defense against herbivory. The objective of this study was to evaluate the effects of silicon applications on the biology of the spittlebug reared on two resistant (SP79-1011 and SP80-1816) and one susceptible (SP81-3250) sugarcane cultivars. Sugarcane plants were grown under greenhouse conditions and submitted to different treatments: with and without silicon fertilizer in two different soil type (sandy and clay soil). The newly hatched nymphs were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Saccharum officinarum; Sugarcane cultivar; Silicon; Pest. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000300013 |
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| Soratto,Rogério Peres; Crusciol,Carlos Alexandre Costa; Castro,Gustavo Spadotti Amaral; Costa,Claudio Hideo Martins da; Ferrari Neto,Jayme. |
| Silicon (Si) is beneficial to plants in several aspects, but there are doubts about the effectiveness of leaf application. The purpose of this work was to evaluate the effects of Si, applied in a newly developed stabilized silicic acid form to the leaf, on nutrition and yield of irrigated white oat and wheat. Two experiments were performed (one per crop) in winter 2008, in Botucatu-SP, Brazil. A completely randomized block design with 14 replications was used. Treatments consisted of a control (without Si application) and Si leaf spraying, at a rate of 2.0 L ha-1 of the commercial product containing 0.8 % soluble Si. Silicon rate was divided in three parts, i.e. applications at tillering, floral differentiation and booting stages. Silicon leaf application... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena sativa; Triticum aestivum; Silicon; Mineral nutrition; Yield components. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000500018 |
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| Pereira,Alexandre Igor A; Silva,Cide M da; Curvêlo,Carmen RS; Pontes,Nadson de C; Pereira,Jardel L; Tavares,Wagner de S; Zanuncio,José C; Luz,José Magno Q. |
| ABSTRACT Thysanoptera species can transmit virus to Solanaceae family vegetables, including tomato plants for industrial processing, causing the disease known as Tomato Spotted Wilt Virus (TSWV). Thrips resistance to insecticides indicate the urgent need of techniques adequate for Integrate Pest Management practices. The objective was to evaluate the control efficiency (CE%) against Frankliniella schultzei (Thysanoptera: Thripidae) of the fungus Beauveria bassiana (Bb), the resistance inducer potassium silicate (KSil) and the chemical insecticide profenophos + cypermethrin (PC) isolated, or in binary mixtures. The treatments were foliar spraying on tomato plants with Bb (T1), KSil (T2) and PC (T3) isolated or in mixtures of Bb+KSil (T4), PC+KSil (T5) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Frankliniella schultzei; Solanum lycopersicum; Entomopathogenic fungi; Silicon; Synergism; Tank mixture. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000400415 |
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| MARTINS,ADALVAN D.; MARTINS,JOÃO PAULO R.; BATISTA,LUCAS A.; DIAS,GABRIELEN M.G.; ALMEIDA,MIRIELLE O.; PASQUAL,MOACIR; SANTOS,HELOÍSA O. DOS. |
| Abstract The use of silicon in Billbergia zebrina cultivation in vitro is an alternative for optimizing micropropagation of this important ornamental plant species. The objective of the present study was to evaluate the growth and anatomical and physiological alterations in Billbergia zebrina (Herbert) Lindley plants as a function of different sources and concentrations of silicon during in vitro cultivation and acclimatization. The experimental design was completely randomized, with a double factorial arrangement and an additional control treatment (2 x 3 + 1). The first factor was relative to calcium silicate and sodium silicate added to the Murashige & Skoog culture medium; the second factor was related to its concentrations, 0.5, 1.0, and 2.0 mg... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bromeliad; Micropropagation; Plant anatomy; Plant physiology; Silicon. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703449 |
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| Registros recuperados: 29 | |
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