Wet Soils
Mostrando 1-12 de 46 artigos, teses e dissertações.
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1. Response of rhizomes of the invasive Hedychium coronarium J. König (Zingiberaceae) to different soil moisture conditions
ABSTRACT The ability to maintain high competitiveness under a wide range of conditions is common among successful invasive species. The performance of rhizomatous macrophytes in different habitats is closely related to morphological and physiological adaptations in the rhizome system. We investigated the effects of soil moisture conditions on the microstruct
Acta Bot. Bras.. Publicado em: 2021-03
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2. Reversibility of the Hardening Process of Plinthite and Petroplinthite in Soils of the Araguaia River Floodplain under Different Treatments
ABSTRACT Although ferruginous materials occur frequently in soils of tropical regions, information about the reversal of the hardening process of these materials is scarce. This study assessed the influence of different chemical treatments and periods of immersion on the reversibility of the hardening process of plinthite and petroplinthite in soils of the A
Rev. Bras. Ciênc. Solo. Publicado em: 02/07/2018
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3. Aging simulation of the tailings from Stava fluorite extraction by exposure to gamma rays
Abstract Tailings storage facilities are disposal systems for storing the waste products of the mining industry consisting of a slurry mixture made of soil, rock and water that remain after the mineral values have been removed from the patent ore. Tailings dams are supposed to last forever, so after their deposition, tailings can experience aging processes w
REM, Int. Eng. J.. Publicado em: 2017-12
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4. Is the herb-shrub composition of veredas (Brazilian palm swamps) distinguishable?
ABSTRACT Vereda (Brazilian palm swamp) is a poorly known savannic phytophysiognomy that occurs on moist soils with high herb-shrub floristic richness. This study aimed to document the herb-shrub species of veredas of the Estação Ecológica Serra Geral do Tocantins - EESGTO, and compare this flora with other veredas in Brazil. Furthermore, we assessed the s
Acta Bot. Bras.. Publicado em: 06/11/2017
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5. Holocene history of a lake filling and vegetation dynamics of the Serra Sul dos Carajás, southeast Amazonia
ABSTRACT Down-core changes in sedimentary facies, elemental geochemistry, pollen, spore, δ13C, δ15N and radiocarbon records from a filled lake, named R4, of the Serra Sul dos Carajás were used to study the relationship between the paleomorphological and paleoecological processes and their significance for Holocene paleoclimatology of the southeast Amazoni
An. Acad. Bras. Ciênc.. Publicado em: 24/07/2017
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6. Methods of soil organic carbon determination in Brazilian savannah soils
Several methods exist for determining soil organic carbon, and each one has its own advantages and limitations. Consequently, a comparison of the experimental results obtained when these methods are employed is hampered, causing problems in the comparison of carbon stocks in soils. This study aimed at evaluating the analytical procedures used in the determin
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-08
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7. Do soil fertilization and forest canopy foliage affect the growth and photosynthesis of Amazonian saplings?
Most Amazonian soils are highly weathered and poor in nutrients. Therefore, photosynthesis and plant growth should positively respond to the addition of mineral nutrients. Surprisingly, no study has been carried out in situ in the central Amazon to address this issue for juvenile trees. The objective of this study was to determine how photosynthetic rates an
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-02
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8. Forms of sulfur in Brazilian Oxisols under no-tillage system / Formas de enxofre em Latossolos sob sistema plantio direto
Soil is a critical component of the global sulfur (S) cycle acting as source and a sink for various S species and mediating changes of S oxidation states. However, very little is known about the identities of these specific organic and inorganic S containing molecules, especially in Brazilian soils under no-tillage (NT) system. Thus, the objectives of this s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2012
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9. Dinâmica do Fomesafen no solo e impacto de Tiametoxam e Fomesafen sobre três espécies de macrófitas aquáticas / Dynamics of fomesafen in soil and impact of thiamethoxam and fomesafen on three freshwater macrophytes
Pesticides are very important to the modern agriculture. However, nowadays, with their increasing use, sometimes indiscriminately, there is also an increasing concern about their soil and water contamination. Fomesafen (herbicide) and thiamethoxam (insecticide) are organic compounds with very different physicochemical properties, but both are used in crops o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2011
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10. Composição isotópica de carbono e nitrogênio em solos e plantas de uma mata de galeria: efeito do gradiente topográfico.
RESUMO: Estudos de composição isotópica de carbono e nitrogênio em solos e folhas são importantes para identificar diferenças nos processos de ciclagem biogeoquímica em ecossistemas. Nesse estudo foram determinadas as composições isitópicas de C e N em solos e folhas de 15 espécies lenhosas de uma Mata de Galeria no Distrito Federal, de acordo com
Planaltina. Publicado em: 2011
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11. Decomposition of Arachis pintoi and Hyparrhenia rufa litters in monoculture and intercropped systems under lowland soil.
Tropical grasslands under lowland soils are generally underutilized and the litter of forage legumes may be used to recover these degraded pastures. The objective of this work was to study the dynamics of litter decomposition of Arachis pintoi (pinto peanut), Hyparrhenia rufa (thatching grass) and a mixture of both species in a lowland soil. These treatments
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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12. Mineralização de nitrogênio e biomassa microbiana em solos de mata de galeria: efeito do gradiente topográfico.
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 biom
Planaltina. Publicado em: 2011