Physical Fractionation Of Organic Matter
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. ORGANIC MATTER AND SOIL FERTILITY IN DIFFERENT SUCCESSIONAL STAGES OF SEASONAL SEMIDECIDUAL FOREST
RESUMO O acúmulo e as transformações da matéria orgânica do solo são fundamentais para a manutenção e melhoria dos atributos químicos, físicos e biológicos do solo, e, consequentemente, para o funcionamento das florestas tropicais. O objetivo deste estudo foi avaliar a influência de florestas secundárias com diferentes estádios sucessionais na
Rev. Caatinga. Publicado em: 09/05/2019
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2. Long-Term Effect of Soil Use and Management on Organic Carbon and Aggregate Stability
ABSTRACT: The conversion of native grassland into farmland causes changes in the soil. Tillage has profound effects on soil organic matter. The intensification of soil tillage decreases soil quality by reducing aggregate stability. Soil aggregate stability and soil organic matter are key indicators for soil quality and environmental sustainability in agro-ec
Rev. Bras. Ciênc. Solo. Publicado em: 13/09/2018
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3. Decomposição de resíduos da colheita e transferência de carbono para o solo em plantações de eucalipto / Harvest residue decomposition and carbon transference to the soil in eucalypt plantations
In Brazil, eucalyptus is planted in regions with different climate and soil conditions, which affect harvest residue decomposition and the rate of carbon transference fromresidues (Cres) to the soil, hence influencing soil organic matter (SOM) content. SOM is considered one of the most important indicators of soil quality and forest production sustainability
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/02/2012
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4. Organic matter in Albaqualf as affected by managements irrigated rice cropping systems the South from Brazil / Matéria orgânica em Planossolo Háplico sob sistemas de manejo no cultivo do arroz irrigado no Sul do Brasil
In the south region from Rio Grande do Sul State, in,Brazil, 950 thousand hectares of soils are cultivated with rice, an important agricultural activity in that region, under an irrigation (flooded) system, using different soil management techniques. Studies regarding the organic matter (OM) dynamic in these soils are incipient, so this work aimed to evaluat
Publicado em: 2010
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5. Characterization of organic matter as support to the study of the formation of surface horizon in soils under minimum cultivation of eucalyptus. / CaracterizaÃÃo da matÃria orgÃnica como subsÃdio ao estudo da formaÃÃo de horizonte superficial em solos sob cultivo mÃnimo de eucalipto.
In Brazil, a substantial part of the forest plantations has been undertaken in areas in which the soil presents some degree of physical, chemical or biological degradation. The protection provided by tree canopy of forest plantations and soil cover, as a function of the deposition of litter, is one of the most important processes in the recovery of degraded
Publicado em: 2009
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6. Estoque e qualidade da matéria orgânica do solo em áreas cultivadas com café sob sistemas agroflorestal e a pleno sol / Soil organic matter stock and quality in agroforestry and full sun coffee systems
Soil organic matter (SOM) restoring is considered a main goal in the enhancement of soil quality. The evaluation of changes in the SOM as a result of soil management practices is fundamental to identify strategies to increase agricultural production, avoiding soil degradation and decreasing the emission of greenhouse gases. In Brazil, no-tillage has been bro
Publicado em: 2009
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7. HUMIC SUBSTANCES IN SOILS FROM DIFFERENTS GEOMORPHOLOGIC FEATURE IN THE EDGE OF RIO GRANDE DO SUL PLATEAU / SUBSTÂNCIAS HÚMICAS EM SOLOS DE DIFERENTES FEIÇÕES GEOMORFOLÓGICAS NO REBORDO DO PLANALTO DO RIO GRANDE DO SUL
In spite of the great importance of the soil organic matter for the sustainability of the natural systems and of agricultural production, its study remains incipient in the area of the Edge of the Rio Grande do Sul Plateau, where different research have been reporting negative aspects of the inadequate soil use. In that sense, the carbon distribution evaluat
Publicado em: 2008
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8. Fracionamento físico e caracterização da matéria orgânica do solo sob diferentes coberturas vegetais / Physical fractionating and characterization of organic matter of soils under different coverages
A matéria orgânica determina os principais atributos que definem a qualidade do solo, sendo diretamente afetada pelas práticas de manejo. Esse trabalho objetivou ampliar o conhecimento referente às influências dos sistemas de manejo no estoque e qualidade da matéria orgânica do solo (MOS). Acredita-se que os diferentes sistemas de manejo agrícola e c
Publicado em: 2007
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9. Estoque e fraÃÃes da matÃria orgÃnica e suas relaÃÃes com o histÃrico de uso e manejo de latossolos. / Organic matter storage and fractions and the historic of Latosol use and management
In cultivated areas, the reductions in the storage of soil organic matter (SOM) in average are 50%, in a period of cutting of the native vegetation and subsequent cultivation inferior to 10 years. The soil use and management practices exercise great influence on the MOS storage and fractions, since the vegetable covering and the soil management they modify t
Publicado em: 2006
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10. Physical Characterization and Quantification of Bacteria by Sedimentation Field-Flow Fractionation
Studies in microbial ecology require accurate measures of cell number and biomass. Although epifluorescence microscopy is an accepted and dependable method for determining cell numbers, current methods of converting biovolume to biomass are error prone, tedious, and labor-intensive. This paper describes a technique with sedimentation field-flow fractionation