Waterlogged Soils
Mostrando 1-12 de 13 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. Daycent Simulation of Methane Emissions, Grain Yield, and Soil Organic Carbon in a Subtropical Paddy Rice System
ABSTRACT The DayCent ecosystem model, widely tested in upland agroecosystems, was recently updated to simulate waterlogged soils. We evaluated the new version in a paddy rice experiment in Southern Brazil. DayCent was used to simulate rice yield, soil organic carbon (SOC), and soil CH4 fluxes. Model calibration was conducted with a multiple-year dataset from
Rev. Bras. Ciênc. Solo. Publicado em: 02/07/2018
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3. Oxidative damage and photosynthetic impairment in tropical rice cultivars upon exposure to excess iron
ABSTRACT Iron plays a pivotal role in the redox reactions of photosynthesis and metabolic processes such as chlorophyll synthesis. Iron availability in waterlogged soils can reach toxic levels and promote oxidative stress. Fe toxicity is the most concerning of stresses for rice in many lowland environments around the world and may cause severe impairments in
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-06
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4. Effects of open drainage ditch design on bacterial and fungal communities of cold waterlogged paddy soils
A field experiment established in 1980 was conducted to evaluate the effects of open drainage ditch applied for water removal on bacterial and fungal communities of cold waterlogged paddy soils in 2011. In this experiment, traditional plate counting and temperature gradient gel electrophoresis were employed to characterize the abundance and diversity of soil
Braz. J. Microbiol.. Publicado em: 2013-09
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5. Incorporacao de palha de arroz em um gleissolo e efeitos no rendimento da cultura do arroz irrigado.
Com o objetivo de verificar os efeitos da incorporacao da palha de arroz sobre o rendimento da cultura do arroz (Oryza sativa, L.) irrigado, foi conduzido um experimento em casa de vegetacao, utilizando-se amosras dos horizontes superficial (A) e subsuperficial (Cg) de um solo gley pouco humico coletado no Vale do rio Sao Joao (RJ). A adicao de palha de arro
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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6. Desempenho de clones de copa de seringueira resistentes ao mal-das-folhas.
O objetivo deste trabalho foi avaliar o desempenho de 18 clones de seringueira resistentes ao Microcyclus ulei, usados como copas enxertadas. Foram utilizados oito clones híbridos de Hevea pauciflora x Hevea guianensis var. marginata, oito de H. pauciflora x H. rigidifolia e dois clones de H. pauciflora, enxertados sobre o painel de CNS AM 7905 seleção pr
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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7. Adubacao organica e mineral e calagem influenciando o rendimento do arroz irrigado.
O sistema de manejo adotado para as areas produtoras de arroz irrigado na regiao Norte Fluminense, RJ, tem conduzido a um progressivo desgaste da camada organica dos gleissolos. O efeito de alguns componentes do manejo do solo, como a adubacao e a calagem, foi o objetivo do presente estudo. O experimento foi conduzido em casa de vegetacao, com amostras de do
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
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8. Calcium partially relieves the deleterius effects of hypoxia on a maize cultivar selected for waterlogging tolerance.
Low soil oxygen concentrations due to waterlogging or transient flooding severely reduce maize production. However, genotypes with tolerance or even resistance to hypoxia develop morphological and biochemical adaptation mechanisms which may prove to be useful criteria for the selection and breeding of new improved genotypes. The objective of this work was to
Revista Brasileira de Milho e Sorgo. Publicado em: 2011
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9. Mineralização e disponibilidade de nitrogênio em solos cultivados com cana-de-açúcar / Nitrogen mineralization and availability in soils cropped with sugarcane
A colheita sem queima da cana-de-açúcar favorece o acúmulo de resíduos na superfície, aumentando os teores de C e N no solo. A quantificação do N mineralizado é de grande interesse, pois a matéria orgânica do solo (MOS) é o principal reservatório de N para as plantas. Embora a mineralização da MOS forneça quantidades apreciáveis de N mineral,
Publicado em: 2011
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10. ESTUDO DE TRAFEGABILIDADE APLICADO A VEÍCULOS DE RODA EM TRANSPORTE E TRAÇÃO / TRAFFICABILITY STUDY APPLIED TO WHEELED VEHICLES IN TRANSPORT AND TRACTION
The ability of vehicles to traverse soft soils is an important aspect of their performance. The geological, climate and topography diversity originated, in Rio Grande do Sul, extensive areas of hydromorphic clay soils, as example, Planssoils and Gleissoils. When saturated of water, these soft soils present low loads support, difficult agricultural machinery
Publicado em: 2010
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11. Denitrification in Low pH Spodosols and Peats Determined with the Acetylene Inhibition Method
Potential denitrification rates were determined for predominantly acid (pH ≥ 3.6) horizons of forestal, miry, and agricultural soils from 22 locations in southern Finland. The acetylene inhibition method was used with nitrate-amended water-logged soils incubated in an N2 atmosphere containing 2.5 or 5% C2H2. Complete inhibition of the reduction of N2O to N
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12. Persistence of Denitrifying Enzyme Activity in Dried Soils †
The effects of air drying soil on denitrifying enzyme activity, denitrifier numbers, and rates of N gas loss from soil cores were measured. Only 29 and 16% of the initial denitrifying enzyme activity in fresh, near field capacity samples of Maury and Donerail soils, respectively, were lost after 7 days of air drying. The denitrifying activity of bacteria add