Consulta: subjectFacets:"Mineralization"
Registros recuperados: 39
Data/hora: 09/06/2024 02:55:55

Mineralización de nitrógeno de diferentes abonos orgánicos
Provedor de dados: 32
Autores: Córdova Ballona, Georgina.
El uso de fertilizantes orgánicos es una buena alternativa en todos los sistemas de producción agrícola, sobre todo si el fin principal es proveer N, mejorar la fertilidad de los suelos y el mantener o incrementar los rendimientos de los cultivo. El nitrógeno es uno de los nutrimentos que en mayor cantidad demandan los cultivos, una vez aplicado tiene gran dinámica, lo cual, aunado a propiedades indeseables del suelo favorecen su pérdida. El uso de materiales orgánicos en la agricultura tiene múltiples propósitos, van desde el aprovechamiento de subproductos hasta el incremento de la sustentabilidad de los agroecosistemas. No obstante la importancia que tienen los materiales orgánicos, para la zona de estudio existen pocos trabajos que consideren aspectos...
Palavras-chave: Manure; Mineralization; NIRS; Quimiometría; PCA; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2010
URL: http://hdl.handle.net/10521/100

Mineralización de nitrógeno de diferentes abonos orgánicos
Provedor de dados: 32
Autores: Córdova Ballona, Georgina.
El uso de fertilizantes orgánicos es una buena alternativa en todos los sistemas de producción agrícola, sobre todo si el fin principal es proveer N, mejorar la fertilidad de los suelos y el mantener o incrementar los rendimientos de los cultivo. El nitrógeno es uno de los nutrimentos que en mayor cantidad demandan los cultivos, una vez aplicado tiene gran dinámica, lo cual, aunado a propiedades indeseables del suelo favorecen su pérdida. El uso de materiales orgánicos en la agricultura tiene múltiples propósitos, van desde el aprovechamiento de subproductos hasta el incremento de la sustentabilidad de los agroecosistemas. No obstante la importancia que tienen los materiales orgánicos, para la zona de estudio existen pocos trabajos que consideren aspectos...
Palavras-chave: Manure; Mineralization; NIRS; Quimiometría; PCA; Producción Agroalimentaria en el Trópico; Maestría.
Ano: 2010
URL: http://hdl.handle.net/10521/100

Microbial-induced remediation of Zn2+ pollution based on the capture and utilization of carbon dioxide
Provedor de dados: 69
Autores: Zhan,Qiwei; Qian,Chunxiang.
Background: Microbial-induced remediation of Zn2+ pollution based on the capture and utilization of carbon dioxide was investigated. In this study, carbon dioxide was absorbed and transformed into carbonate ions under the enzymatic action of Paenibacillus mucilaginosus, which was being utilized to mineralize Zn2+. Results: The compositional and morphological properties of the precipitations were studied using Fourier transform infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The thermal properties of the precipitates were investigated by thermogravimetric-differential scanning calorimetry (TG-DSC). The FTIR results confirmed that the functional groups of the...
Tipo: Journal article
Palavras-chave: Carbon dioxide; Microbial-induced; Mineralization; Paenibacillus mucilaginosus; Remediation.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000100005

Recomendação de dose de lodo de esgoto: a questão do nitrogênio.
Provedor de dados: 14
Autores: PIRES, A. M. M.; ANDRADE, C. A. de.
Resumo: Considerações sobre a dose de lodo de esgoto adequada que deve ser aplicada nas culturas de acordo com a regulamentação fornecida pela Resolução n. 375 do CONAMA e tendo em vista experimentos que aferiram os valores da fração de mineralização do nitrogênio (FMN).
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Lodo de esgoto; Adubo de esgoto; Nitrogênio; Adubo orgânico; Fertilizante nitrogenado; Lodo residual; Sewage sludge; Nitrogen fertilizers; Organic fertilizers; Nitrogen; Mineralization.
Ano: 2014
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1004771

Fontes de alimentos para caprinos.
Provedor de dados: 14
Autores: RAMOS, G. M.; BEZERRA, A. A. de C.; CAMARA, J. A. da S.
Forrageiras nativas - arvores e arbustos; Melhoramento das pastagens nativas; Restos de culturas; Leguminosas arbustivas cultivadas; Fabricacao de feno de feijao guandu, leucena e rama de mandioca; Mineralizacao; Mistura multipla; Aguadas.
Tipo: Recomendação Técnica (INFOTECA-E)
Palavras-chave: Leguminosa arbustiva; Leucena; Rama de mandioca; Mistura multipla; Goat; Feeding; Native pasture.; Caprino; Guandu; Mineralização; Pastagem Nativa.; Nutrição Animal; Cassava; Legumes; Mineralization; Pigeon peas.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/57839

Dinâmica do nitrogênio no solo em áreas de cerrado e de pastagens cultivadas no Pantanal Sul Mato-Grossense.
Provedor de dados: 14
Autores: FERNANDES, F. A.; FERNANDES, A. H. B. M.
Um estudo foi conduzido em fazenda do Pantanal Sul Mato-Grossense, visando avaliar as alteracoes nas taxas de mineralizacao de N e nitrificacao liquidas no solo, em consequencia do desmatamento e implantacao de pastagens cultivadas. Foram tomadas dez amostras de solo compostas, em seis epocas a partir da semeadura da graminea, analisados os teores de amonia e nitrato, e calculadas as taxas de mineralizacao e nitrificacao. Os resultados mostraram que o desmatamento e implantacao de pastagem provocou alteracoes significativas na dinamica do nitrogenio do solo, com conteudos menores de amonia e maiores de nitrato, e menores taxas de mineralizacao e nitrificacao liquidas no solo das areas sob pastagem em relacao ao solo das areas sob cerrado nativo.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Pasture.; Nitrogênio; Mineralização; Pastagem; Solo.; Pantanal; Mineralization; Nitrogen; Soil.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/793305

Microrganismos e disponibilidade de fósforo (P) nos solos: uma análise crítica.
Provedor de dados: 14
Autores: MENDES, I. de C.; REIS JUNIOR, F. B. dos.
ABSTRACT: Cerrado soils are extremely old, highly weathered and depleted in essential nutrients, especially P. For this reason, the addition of P fertilizers is mandatory in order to obtain economical yields of annual crops. Soil microorganisms play a key role in the P cycle. The P immobilized in the soil microbial biomass acts as reservoir of this element. Soil microorganisms also produce enzymes that act in the P mineralization, participate in the solubilization of inorganic phosphorus and are able to form symbiosis with plants, denominated mycorrizha, enhancing the uptake of this element. In this review we discuss the results of several studies evaluating the use of soil microorganisms to increase P availability in soils, some of the difficulties...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Fósforo; Inoculação; Microbiologia do Solo; Mineralização; Microrganismo; Solubilização.; Inoculation methods; Microbiology; Microorganisms; Mineralization; Phosphorus; Solubilization.; Soil.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568171

Alternativas para mineralização de bovinos em Roraima.
Provedor de dados: 14
Autores: BRAGA, R. M.
Tipo: Folhetos
Palavras-chave: Alternativa; Brasil; Roraima; Bovine; Bovino; Mineralização; Brazil; Mineralization.
Ano: 1995
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/687527

Mineralização de nitrogênio e biomassa microbiana em solos de mata de galeria: efeito do gradiente topográfico.
Provedor de dados: 14
Autores: PARRON, L. M.; BUSTAMANTE, M. M. da C.; PRADO, C. L. C.
RESUMO: A disponibilidade de nitrogênio (N) inorgânico para as plantas, geralmente, depende da taxa de mineralização da matéria orgânica. A biomassa microbiana, além de indicadora da qualidade do solo, está relacionada à disponibilização de nutrientes. Este trabalho objetivou determinar as taxas de mineralização líquida de N e o carbono da biomassa microbiana (CBM) em solos, em um gradiente topográfico de Mata de Galeria no Distrito Federal, por 12 meses. O gradiente comporta três comunidades florísticas: úmida (margem do córrego), intermediária e seca (borda da mata), nas quais a produção líquida de N inorgânico foi 81,5; 29,2 e 25,3 kg N ha (elevado a -1) ano (elevado a -1), respectivamente. A quantidade de N-NO3- disponível na comunidade úmida foi 0,69...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Microbial flora.; Biomassa; Cerrado; Nitrogênio; Nitrificação; Mineralização; Microbiologia do Solo; População Microbiana; Umidade do Solo.; Solo; Biomass; Mineralization; Nitrification; Nitrogen; Soil water content.; Soil biology; Soil.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568114

Organisation, sclerotisation et composition minerale des sclerites d''une espece d'isopode marin et de quatre especes d'isopodes terrestres oniscoides
Provedor de dados: 5
Autores: Ansenne, A; Compere, P; Goffinet, G.
The mineralized tergite cuticle of four terrestrial isopods (Oniscoidea) (Ligia oceanica, Oniscus asellus, Porcellio scaber and Armadillidium vulgare ) and of the marine isopod Sphaeroma serratum shows a general organization comparable to the fundamental plan of the decapod sclerite cuticle. Moreover, as in decapods, the procuticular layers are not tanned and mineralization rates, from 60 to 80% of the total cuticular dry weight, are of the same importance. However, the chitin protein microfibril distribution according to a homogeneous system in the mineralized procuticular proximal layer in all isopod species so far studied does not allow any comparison of this layer with the non-mineralized membranous layer.
Tipo: Text
Palavras-chave: Sphaeroma serratum; Armadillidium vulgare; Porcellio scaber; Oniscus asellus; Ligia oceanica; Isopoda; Malacostraca; Comparative studies; Mineralization.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-1374.pdf

Problemes de morphogenese cuticulaire chez les crustaces
Provedor de dados: 5
Autores: Bouligand, Y.
The crustacean integument is an excellent model for the study of cuticular morphogenesis, at different organization levels. At the supermolecular level, subunits of chitin and protein assemble and show the organization of a stabilized liquid crystal. At higher levels corresponding to cells and cells populations, several controls are involved in the fine architecture of the epicuticle, in the mineral distribution and in characters which concern the whole animal, such as isometric or allometric growth.
Tipo: Text
Palavras-chave: Crustacea; Mineralization; Morphogenesis; Cells; Molecular structure.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-1372.pdf

A laboratory model system for analysing microbial interactions occurring in anoxic estuarine sediments.
Provedor de dados: 5
Autores: Herbert, R; Keith, S.
Defined mixed populations of Clostridium butyricum, Desulfovibrio desulfuricans and Chromatium vinosum co-existed for long periods when grown in a single stage chemostat with glucose as sole carbon source. The nature and availability of the inorganic nitrogen source exerted a major effect on carbon flow in the experimental system. The data show that both the C. butyricum and D. desulfuricans isolates can utilise NO sub(3) as an e super(-)acceptor with an increase in cell yield. Under these growth conditions the free S super(2-) levels were lower resulting in more stable mixed populations. In addition the data show that the C. butyricum produces more oxidised fermentation end-products (acetate) when NO sub(3) super(-) was available and more reduced products...
Tipo: Text
Palavras-chave: Chromatium vinosum; Desulfovibrio desulfuricans; Clostridium butyricum; Biogeochemistry; Models; Bacteria; Detritus; Mineralization; Anoxic sediments; Estuarine sedimentation; Analytical techniques; Carbon cycle; Interspecific relationships; Microbiology.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-947.pdf

Models of relations between bacteria and plankton, and regeneration processes in marine planktonic ecosystem.
Provedor de dados: 5
Autores: Martin, Y; Lelong, P; Cauchi, B.
In order to study bacteria-plankton relationships, experimental and mathematical models were used to stimulate biological processes implicated in plankton ecosystems and to analyze community relationships. The model components are phytoplankton, zooplankton, autotrophic and heterotrophic bacteria, ciliates, nutrients, organic matter and phytoplankton antibiotics. This study shows the importance of some factors affecting bacteria communities dynamics and the bacterial activity in mineralization process. Bacterial populations seem to be controlled essentially by the concentration and chemical composition of organic substrates. Antibiosis and predation show a lesser importance on changes in bacteria communities.
Tipo: Text
Palavras-chave: Biogeochemistry; Bacteria; Microorganisms; Mathematical models; Mineralization; Ecosystems; Plankton; Ecological associations.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-982.pdf

Dissolved organic carbon, nitrogen and phosphorus in the N-E Atlantic and the N-W Mediterranean with particular reference to non-refractory fractions and degradation
Provedor de dados: 5
Autores: Aminot, Alain; Kerouel, Roger.
Dissolved organic carbon (DOC), dissolved organic nitrogen (DON) and dissolved organic phosphorus (DOP) measured in deep profiles in the N-E Atlantic and in the N-W Mediterranean in the period 1984-2002 are described. After accurate validation, they show close agreement with those previously published. Classic profiles were obtained, with concentrations decreasing in deep waters. In the Mediterranean and in the Atlantic comparable concentrations were found in the 1500-2000 m waters, 44-46 mumol 1(-1) DOC, 2.6-2.8 mumol 1(-1) DON and 0.02-0.03 mumol 1-1 DOP. In the surface layers, DOC concentrations were higher, but DON and DOP concentrations lower, in the Mediterranean than in the Atlantic, leading to higher element ratios in the Mediterranean. In autumn,...
Tipo: Text
Palavras-chave: N W Mediterranean; N E Atlantic; Mineralization; Non refractory; Refractory; Dissolved organic phosphorus; Dissolved organic nitrogen; Dissolved organic carbon.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-472.pdf

Interrelations entre des communautes mixtes de bacteries anaerobies isolees de sediments marins
Provedor de dados: 5
Autores: Marty, D.
The mineralization of cellulose was examined in mono and cocultures of marine anaerobic bacteria (cellulolytic bacteria, fermentative non-cellulolytic bacteria and methane-producing bacteria). These studies displayed interactions between these groups of microorganisms: inhibition relationships (inhibition of methanogens during active growth of fermentative bacteria) and syntrophic relationships (growth of fermentative non-cellulolytic bacteria depended on metabolites produced by cellulolytic bacteria; increased in rate of cellulose hydrolysis in presence of fermentative non-cellulolytic bacteria; interspecies H sub(2) transfer reaction between fermentative bacteria and methane-producing bacteria).
Tipo: Text
Palavras-chave: Biogeochemistry; Sedimentation; Sediments; Fermentation; Mineralization; Cellulose; Methanogenesis; Interspecific relationships; Anaerobic bacteria.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-948.pdf

Minéralisation de la matière organique et échanges ioniques à l'interface eau-sédiment de l'étang de Berre, Méditerranée
Provedor de dados: 5
Autores: Delmas, Daniel.
The étang de Berre, near Marseilles (France), is an inland brackish basin with a high primary rate of production. In 1966, the diversion of the Durance River introduced important hydrological changes. A study of organic matter mineralization and ionie exchanges at the water-sediment interface has made it possible to distinguish two areas, according to the composition of organic matter, mineralization mechanism and ionie transfers. In the North, the high rate of mineral sedimentation leads to a low content of organic matter in the sediment. This organic matter of detrital origin is little affected by mineralization; there is, however, high production of ammonium nitrogen, which is released to overlying waters. Nitrates and nitrites undergo denitrification...
Tipo: Text
Palavras-chave: Interface eau-sédiment; Matière organique; Eau interstitielle; Minèralisation; Milieu saumâtre; Water-sediment interface; Organic matter; Lnterstitial water; Mineralization; Brackish basin.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00122/23317/21142.pdf

Le système des carbonates influencé par la diagenèse précoce dans les sédiments côtiers méditerranéens en lien avec l’acidification des océans
Provedor de dados: 5
Autores: Rassmann, Jens.
Continental shelves are key regions for the global carbon cycle and particularly exposed to ocean acidification. A large part of organic matter (OM) of continental and marine origin is mineralized in estuarine sediments following oxic and anoxic pathways. This mineralization produces dissolved inorganic carbon (DIC) leading to acidification of the bottom waters. Anoxic mineralization can produce total alkalinity (TA) that can contribute to buffer bottom water pH and increase the CO2 storage capacity of seawater. Measurements in the sediments of the Rhone River prodelta showed that anoxic mineralization, especially sulfate reduction, are the major pathways of OM mineralization and create high DIC and TA fluxes. Land derived OM is mineralized close to the...
Tipo: Text
Palavras-chave: Carbonate system; Early diagenesis; Mineralization; Pelagic-bentic fluxes; Rhone prodelta; Ocean acidification.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00659/77076/78398.pdf

Action des epandages de craie (ou CaCO3) sur les vases des claires et des parcs ostreicoles.
Provedor de dados: 5
Autores: Feuillet, Michelle; Gouleau, Dominique.
Tipo: Text
Palavras-chave: Water quality; Mineralization; Mud; Oyster pond; Chalk spreeding.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/publication-1993.pdf

Transfert et mineralisation de la matiere organique azotee a travers les deux premiers echelons de la micro communaute heterotrophe
Provedor de dados: 5
Autores: Vanwambeke, F; Bianchi, M.
Bacterial response to organic (amino acids) or inorganic (NH sub(4) super(+)) nitrogen was studied in 350 liter closed batch systems. The experiments demonstrate an important NH sub(4) super(+) remineralization associated with bacterial growth. The differences between substrate and bacterial C/N ratios and bacterial metabolic demands partly explain the high values of ammonia produced. Grazing by heterotrophic microflagellates resulted in an important release of NH sub(4) super(+). This suggests and important role of grazers for the nitrogen remineralization in natural waters.
Tipo: Text
Palavras-chave: Flagellata; Ciliata; Bacteria; Plankton; Heterotrophic organisms; Ammonia; Amino acids; Nitrogen cycle; Mineralization.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-986.pdf

Effect of P depletion on the functional pools of diatom carbohydrates, and their utilization by bacterial communities
Provedor de dados: 5
Autores: Labry, Claire; Delmas, Daniel; Moriceau, Brivaela; Gallinari, Morgane; Quere, Julien; Youenou, Agnes.
Phosphorus (P) limitation of phytoplankton growth is known to affect the accumulation and release of carbohydrates (CHO) by micro-algae. However, relatively little is known about the fate of algal exudates, notably their bacterial degradation. The CHO chemical characterization is also not exhaustive, especially in ‘functional’ pools relevant for phytoplankton physiology (particulate reserve [R] or structural [S] CHO) and for bacterial degradation (dissolved mono- [MDCHO] and polysaccharides [P-DCHO]). In this study, we investigated how P depletion and repletion affect the CHO composition in diatom Thalassiosira weissflogii cultures, and the shortterm response of free and diatom-attached bacteria in terms of abundance and potential βglucosidase activity...
Tipo: Text
Palavras-chave: P limitation; Phytoplankton; Diatom; Bacteria; Mineralization; Carbohydrate; Glucosidase.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00628/74045/73532.pdf

Use of nitrogen from fertilizer and cover crops by upland rice in an Oxisol under no-tillage in the Cerrado
Provedor de dados: 86
Autores: Silva,Edson Cabral da; Muraoka,Takashi; Franzini,Vinícius Ide; Sakadevan,Karuppan; Buzetti,Salatiér; Arf,Orivaldo; Bendassolli,José Alberto; Soares,Frederico Antônio Loureiro.
Abstract: The objective of this work was to evaluate the effects of cover crops on the yield of upland rice (Oryza sativa) grown under no-tillage system, in the presence and absence of N fertilizer, as well as to quantify, in the field, the use efficiency of N from urea and cover crops by upland rice, through the 15N isotope dilution technique. The field experiment was carried out in the municipality of Selvíria, in the state of Mato Grosso do Sul, Brazil, in an Oxisol (Rhodic Hapludox) in the Cerrado (Brazilian savanna) region. The experimental design was a randomized complete block with 15 treatments and four replicates, in a 5x3 factorial arrangement. The treatments were four cover crops (Crotalaria juncea, Cajanus cajan, Mucuna pruriens, and Pennisetum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Crop residues; Isotope technique; Mineralization; 15N; Nutrient cycling.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000600728

Influence of repeated applications of glyphosate on its persistence and soil bioactivity
Provedor de dados: 86
Autores: Andréa,Mara Mercedes de; Peres,Terezinha Bonanho; Luchini,Luiz Carlos; Bazarin,Sheila; Papini,Solange; Matallo,Marcus Barifouse; Savoy,Vera Lucia Tedeschi.
Pesticide degradation studies are essential to evaluate its impact in the environment and on non-target organisms. The effect of repeated soil applications of the herbicide glyphosate on its dissipation and on soil microorganisms was studied by radiometric and microbial techniques. Results indicated fast dissipation of the [14C]-glyphosate or [14C]metabolites extractable residues (half-life of 0.92±0.29 month), but increasing half-lives of total mineralization ranging from 2.2 to 3.4 months as the number of applications increased from 1 to 4. No significant correlation was found between 14CO2 production and dehydrogenase activity.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pesticide residues; Mineralization; Dehydrogenases; Soil treatment.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003001100012

Urea and sugarcane straw nitrogen balance in a soil-sugarcane crop system
Provedor de dados: 86
Autores: Gava,Glauber José de Castro; Trivelin,Paulo Cesar Ocheuze; Vitti,André Cesar; Oliveira,Mauro Wagner de.
The objectives of this study were to evaluate nitrogen utilization by sugarcane ratoon from two sources, applied urea and sugarcane straw covering soil surface (trash blanket), besides the recovery of N from both sources in the soil-plant system. The following treatments were established in a randomized block design with four replicates: T1, vinasse-urea (100 kg ha-1 of urea-N) mixture applied on the total area of the soil covered with cane trash labeled with 15N; T2, vinasse-urea mixture (urea labeled with 15N; 100 kg ha-1 of urea-N) applied on the total area of the soil covered with non-labeled sugarcane trash; and T3, urea-15N (100 kg ha-1 of urea-N) applied in furrows at both sides of cane rows, with previous surface application of vinasse, onto soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: N recovery; Fertilizer-15N; Crop residue; Mineralization; Nitrogen use efficiency.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2005000700010

Enhanced degradation of metalaxyl in agricultural soils of São Paulo State, Brazil
Provedor de dados: 86
Autores: Papini,Solange; Andréa,Mara Mercedes de.
This work investigated the effect of repeated applications on enhanced degradation of metalaxyl in two different agricultural soils used for cultivation of orange and lemon from Casa Branca and Itapetininga districts of São Paulo State, Brazil. Soil samples were collected from areas repeatedly treated with commercial ridomil 50GR for six successive years, and from other areas never exposed to this fungicide. At the laboratory, soil samples received a 14C-metalaxyl solution and its degradation was studied through radiometric techniques to measure biomineralization and recovery of extractable- and soil-bound products. Enhanced degradation was verified only in one soil, although partial degradation and mineralization of the fungicide were detected in both...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fungicides; Biodegradation; Mineralization; Soil deterioration.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000100001

Diuron Sorption, Desorption and Degradation in Anthropogenic Soils Compared to Sandy Soil
Provedor de dados: 87
Autores: ALMEIDA,C.S.; MENDES,K.F.; JUNQUEIRA,L.V.; ALONSO,F.G.; CHITOLINA,G.M.; TORNISIELO,V.L.
ABSTRACT: The aim of this study was to evaluate diuron sorption, desorption and degradation in two anthropogenic soils (Terra Preta de Índio - TPI) in contrast to a sandy soil (Quartzarenic Neosol - NQo). Sorption-desorption studies were performed by the batch equilibrium method and biodegradation in biometric bottles using radiolabeled diuron in 14C. Freundlich coefficient (Kf) values ranged from 13.50 to 50.41 µmol(1-1/n) L1/n kg-1 in TPI-2 and TPI-1, respectively, indicating very high diuron sorption in anthropogenic soils, following the order: TPI-1 ≥ TPI-2 &gt; NQo (99.10, 98.95 and 60.8%, respectively). Diuron desorption was very low in anthropogenic soils, ranging from 1.36 (TPI-1) to 1.70% (TPI-2), and 24% to NQo. Accumulated diuron mineralization...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bound residue; Mineralization; Sorption isotherms; Amazonian soils.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100233

Comparison of the Growth and Mineralization of the Femur, Tibia, and Metatarsus of Broiler Chicks
Provedor de dados: 89
Autores: Han,JC; Qu,HX; Wang,JG; Chen,GH; Yan,YF; Zhang,JL; Hu,FM; You,LY; Cheng,YH.
ABSTRACTThis study aimed at comparing the growth and mineralization of the femur, tibia, and metatarsus of male and female broiler chicks. On the day of hatch, 100 male and 100 female Ross 308 broiler chicks were transferred stainless cages with 10 birds per cage. On d 7, 14, 21, 28, 35, and 42, five males and five females were sacrificed and their femur, tibia, and metatarsus were collected. Results showed that the tibia was the heaviest and the longest and contained the highest content of ash and calcium (Ca) among the three leg bones. The femur had the greatest diameter. The weight, length, diameter, and ash weight of the femur, tibia, and metatarsus linearly increased with age. The ash, Ca, and phosphorus (P) content in the femur and the tibia...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bone; Mineralization; Calcium; Phosphorus; Broiler chick.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2015000300333

Mild and Moderate Extraction Methods to Assess Potentially Available Soil Organic Nitrogen
Provedor de dados: 90
Autores: Braos,Bruno Boscov; Ferreira,Manoel Evaristo; Cruz,Mara Cristina Pessôa da; Braos,Lucas Boscov; Barbosa,José Carlos.
ABSTRACT The use of chemical methods to assess the soil organic nitrogen (N) potentially available to plants is not a common practice in Brazil. However, associated with others, this tool might improve efficiency in the use of waste and nitrogen fertilizers. In our study, chemical methods were tested to assess potentially available soil N in samples of 17 representative soils of the western plateau of the state of São Paulo (10 Oxisols and 7 Ultisols). Available soil N was extracted from the collected soil samples using moderate (ISNT-Illinois Soil Nitrogen Test) and mild (hot water and heated solutions of 2 mol L-1 KCl and 0.01 mol L-1 CaCl2) extraction methods. The levels of potentially available N obtained from these chemical methods were correlated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chemical analysis; Organic matter; Mineralization.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100422

Glyphosate behavior in a Rhodic Oxisol under no-till and conventional agricultural systems
Provedor de dados: 90
Autores: Prata,Fábio; Lavorenti,Arquimedes; Regitano,Jussara Borges; Vereecken,Harry; Tornisielo,Valdemar Luiz; Pelissari,Adelino.
The behavior of glyphosate in a Rhodic Oxisol, collected from fields under no-till and conventional management systems in Ponta Grossa, Parana state (Brazil) was investigated. Both agricultural systems had been in production for 23 years. Glyphosate mineralization, soil-bound forms, sorption and desorption kinetics, sorption/desorption batch experiments, and soil glyphosate phythoavailability (to Panicum maximum) were determined. The mineralization experiment was set up in a completely randomized design with a 2 x 2 factorial scheme (two management systems and two 14C radiolabelled positions in the glyphosate), with five replicates. 14CO2 evolution was measured in 7-day intervals during 63 days. The glyphosate sorption kinetics was investigated in a batch...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbicide; Sorption; Degradation; Mineralization; Phytotoxicity; Panicum maximum.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832005000100007

Morphogenesis of elephant grass fertilized with organic compost from solid waste in small ruminants
Provedor de dados: 124
Autores: Meneses,Abner José Girão; Cândido,Magno José Duarte; Pompeu,Roberto Cláudio Fernandes Franco; Souza,Henrique Antunes de; Guedes,Fernando Lisboa.
ABSTRACT This study evaluated the biomass flow of irrigated Pennisetum purpureum cv. Cameroon fertilized with different levels of organic compost made from waste derived from production and slaughter of sheep and goat farming. The experiment was conducted in a cut and carry of elephant grass for four 60 day-cycles. The treatments consisted of levels of organic compost (0; 13.3; 26.6; 39.9; 53.2; 79.8) ton ha-1, besides a mineral treatment with nitrogen and potassium of 720 and 900 kg ha-1 yr-1, respectively. This was a split plot randomized block design with repeated measures over time, in which levels were assigned to plots, and cycles, to subplots. Morphogenetic characteristics of elephant grass were influenced by levels of the compost. Forage production...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: C:N ratio; Biomass flow; Leaf elongation rate; Mineralization; Pennisetum purpureum.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000400699

Effect of previous soil management on sugarcane response to nitrogen fertilization
Provedor de dados: 63
Autores: Otto,Rafael; Mariano,Eduardo; Mulvaney,Richard Lesley; Khan,Saeed Ahmad; Boschiero,Beatriz Nastaro; Tenelli,Sarah; Trivelin,Paulo Cezar Ocheuze.
ABSTRACT: N Fertilizer recommendations must be improved to optimize N use efficiency (NUE) for bioenergy crops. A study was conducted to test the hypothesis that sites varying in historical usage of by-product differ in soil N-supplying power and sugarcane (Saccharum spp.) responsiveness to N fertilization. Our aim was to quantify soil N availability and N fertilizer rates, sources, and application timings for their effects on sugarcane yield and NUE. Three N response trials, each involving 0 to 200 kg N ha−1, were conducted in the state of São Paulo, Brazil, at sites varying historically in the usage of vinasse. Before fertilizer application and at harvest, soil inorganic N content was quantified and potential N mineralization estimated by the Illinois...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Saccharum spp.; Illinois Soil N Test; Inorganic N; Vinasse; Mineralization.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019000100072

Resilience of soil microbial activity and of amino acid dynamics to the removal of plant carbon inputs during winter
Provedor de dados: 63
Autores: Avramides,Elizabeth J.; Christou,Matina; Jones,David L.
Many temperate agricultural soils have prolonged periods in the winter when plant carbon inputs to the soil are low. Soil maintained at low temperature in the absence of plants was used to simulate the conditions in a vineyard soil during winter. In a four month simulated overwintering period we showed that the concentration of dissolved organic carbon and nitrogen in soil solution slowly declined alongside heterotrophic soil respiration. Measurements of free amino acid concentrations and turnover indicated that the amino acid pool in soil was rapidly depleted but readily replenished throughout the four-month period. This indicates that the soil contained intrinsic reserves of labile C that was capable of supporting the soil microbial community in times of...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: DOC; DON; Microbial activity; Mineralization; Nitrate; Storage.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000100019

USE OF BIOCHAR IN AGRICULTURE
Provedor de dados: 37
Autores: SÁNCHEZ-REINOSO,Alefsi David; ÁVILA-PEDRAZA,Edgar Alvaro; RESTREPO-DÍAZ,Hermann.
ABSTRACT The objective of this review is to show how biochar (BC) can be obtained and its effects on the physicochemical properties of soils and physiological behavior of cultivated plants. Biochar is a product rich in carbon that comes from the pyrolysis of biomass, generally of vegetable origin. It is obtained by the decomposition of organic matter exposed to temperatures between 200-900 °C in an atmosphere with low oxygen availability (pyrolysis), which can be slow, intermediate or fast. BC can contain varying levels of elements such as: carbon, nitrogen, oxygen, hydrogen, and sulfur. The primary sources to produce biochar are the forest, agroindustrial, and manure residues. BC quality and physical-chemical characteristics will depend on the type of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon capture; Mineralization; Plant nutrition; Pyrolysis.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000200327

Kinetics of the aerobic decomposition of Talauma ovata and Saccharum officinarum - doi: 10.4025/actascibiolsci.v34i4.9396
Provedor de dados: 3
Autores: Gimenes, Karen Zauner; Universidade Federal de São Carlos; Leite-Rossi, Luciene Aparecida; Universidade Federal de São Carlos; Cunha-Santino, Marcela Bianchessi; Universidade Federal de São Carlos; Bianchini Junior, Irineu; Universidade Federal de São Carlos; Trivinho-Strixino, Susana; Universidade Federal de São Carlos.
The aim of this study is to evaluate the kinetics of aerobic decomposition of Saccharum officinarum and Talauma ovata leaves. For each species, decomposition chambers (leaves and water) were set up, which were maintained under controlled conditions. Each sampling day (1, 7, 15, 30, 39, 58, 72 and 90 days), the concentrations of total organic carbon, pH and electrical conductivity (EC) were determined in the dissolved fraction, while the mass and cell wall fractions (CWF) were determined in the particulate fraction. The pH stabilization of the chambers with T. ovata and S. officinarum leaves occurred in alkaline (ca. 8 - 8.5) and close to the neutrality (ca. 7 - 7.5) environment, respectively. The EC values were on average 1.6 times higher in incubations...
Palavras-chave: 2.05.00.00-9 riparian zone; Mass loss; Mineralization; Dissolved organic carbon; Particulate organic carbon 2.05.00.00-9.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/9396

Short-term changes and longitudinal distribution of carbon metabolism in the Piauí River estuary (Sergipe, Brazil)
Provedor de dados: 57
Autores: SOUZA,M. F. L. de; COUTO,E. C. G.
Net pelagic metabolism (NPM) and net ecosystem metabolism (NEM) were assessed by sigmaCO2 changes in three sampling stations along Piauí River estuary. At the upper estuary station, sampling was carried out over 48 h. Samples exhibited high DIN:DIP ratios. Chlorophyll-a ranged from 0.2 to 2.5 mug.l-1, being higher at the upper estuarine station than marine ones. Net pelagic metabolic rates ranged from -13.2 to 61.2 mgC.m7-2.d-1. Presence of mucilaginous algal material can explain the net mineralization. In the photic period, NPM ranged from-0.05 to 3.04 mgC.m-2h-1. NEM ranged from -7.77 to 6.65 mgC.m-2.d-1. Bottom ressuspension due to microphytobenthic flotation and a high turbidity plume inside de estuary reflected in negative metabolic rates...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Estuary; Short-term changes; Primary production; Mineralization; Microphytobenthos.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000200003

Dissolved inorganic carbon and metabolism of an eutrophic lacustrine system: variations from a 36-hours study
Provedor de dados: 57
Autores: PEDROSA,P.; REZENDE,C. E.
Based on variations of pelagial dissolved inorganic carbon (DIC) concentrations this article provides estimations of net primary productivity and net mineralization -- net carbon metabolism -- in Cima Lake (Rio de Janeiro State). DIC concentrations varied from 203 to 773 µmol L-1 and %CO2(aq) (saturation) from 339 to 4,901. Net carbon metabolism per light/dark periods from the 36 hours of study ranged, respectively, from -556 to 503 mmol DIC m-2 12 h-1. Marked variations in daily net carbon metabolism of the lake were also observed. The values ranged from -25 to -194 mmol DIC m-2 day-1. The findings were discussed as indicators of dynamic biological behavior toward production or mineralization of organic matter in the system. And, the system seemed to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DIC; Carbon metabolism; Net primary productivity; Mineralization; Eutrophic lake.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400010

Tissue transglutaminase (TG2) activity regulates osteoblast differentiation and mineralization in the SAOS-2 cell line
Provedor de dados: 56
Autores: Yin,Xiaoxue; Chen,Zhongqiang; Liu,Zhongjun; Song,Chunli.
Tissue transglutaminase (type II, TG2) has long been postulated to directly promote skeletal matrix calcification and play an important role in ossification. However, limited information is available on the expression, function and modulating mechanism of TG2 during osteoblast differentiation and mineralization. To address these issues, we cultured the well-established human osteosarcoma cell line SAOS-2 with osteo-inductive conditioned medium and set up three time points (culture days 4, 7, and 14) to represent different stages of SAOS-2 differentiation. Osteoblast markers, mineralization, as well as TG2 expression and activity, were then assayed in each stage. Furthermore, we inhibited TG activity with cystamine and then checked SAOS-2 differentiation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Transglutaminase; Osteoblast; Differentiation; Mineralization; Bone morphogenetic protein-2 (BMP-2).
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012000800002

Effects of fluoride on proliferation and mineralization in periodontal ligament cells in vitro
Provedor de dados: 56
Autores: Li,K.Q.; Jia,S.S.; Ma,M.; Shen,H.Z.; Xu,L.; Liu,G.P.; Huang,S.Y.; Zhang,D.S.
Fluoride, which is often added to toothpaste or mouthwash in order to protect teeth from decay, may be a novel therapeutic approach for acceleration of periodontal regeneration. Therefore, we investigated the effects of fluoride on proliferation and mineralization in human periodontal ligament cells in vitro. The periodontal ligament cells were stimulated with various concentrations of NaF added into osteogenic inductive medium. Immunohistochemistry of cell identification, cell proliferation, alkaline phosphatase (ALP) activity assay, Alizarin red S staining and quantitative real-time-polymerase chain reaction (RT-PCR) were performed. Moderate concentrations of NaF (50-500 μmol/L) had pro-proliferation effects, while 500 μmol/L had the best effects. ALP...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fluoride; Periodontitis; Periodontal ligament cells; Mineralization.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000800601

Glyphosate Mineralization: Effect of Temperature and Soybean and Corn Crop Residues
Provedor de dados: 117
Autores: Rampoldi,Ariel; Hang,Susana; Barriuso,Enrique.
Mineralization is the main mechanism of dissipation of glyphosate herbicide (N-[phosphonomethyl] glycine) in soil. However, there is scarce information about the mineralization process in strata formed by stubbles in no-tillage systems. The kinetics and rate of mineralization of herbicide in stubbles of soybean (Glycine max L. Merr.) and corn (Zea mays L.) were investigated. To evaluate the effect of age of crop residues, samples of soybean stubbles were collected immediately after harvest (Soja 1) and four months after harvest (Soja 2). Corn crop residues were collected three months after harvest. Glyphosate evolution and total microbial activity (TMA) were monitored by release of 14C-CO2 and C-CO2 under laboratory conditions with two temperatures, 15 and...
Tipo: Journal article
Palavras-chave: Glyphosate; Stubbles; Mineralization; Non-tillage system; Total microbial activity.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392008000100002

Decomposition and nutrient release of leguminous green manure species in the Jaguaribe-Apodi region, Ceará, Brazil
Provedor de dados: 65
Autores: Pereira,Natanael Santiago; Soares,Ismail; Miranda,Fábio Rodrigues de.
ABSTRACT: The use of leguminous green manure can be an alternative for the region agricultural systems due to its ability to incorporate significant amounts of nutrients into the soil through decomposition and nutrient release from biomass. This study aimed to evaluate the decomposition rates and nutrient release of six leguminous green manure species ( Crotalaria juncea , Canavalia ensiformes , Cajanus cajan , Crotalaria spectabilis ,  Dolichos lablab and Mucuna deeringiana ) in an area of the Jaguaribe-Apodi agricultural region, Brazil. Experiment was carried out under field conditions in a randomized block design with five replications. Decomposition and nutrient release from leguminous biomass were monitored by sampling at 30, 60, 90, 120, 150 and 180...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mineralization; Nutrient cycling; Plant residues.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000600970