Distribuição espacial da matéria orgânica, grau de floculação e argila dispersa em água em área de vegetação natural em regeneração e pastagem

Lima, J.S.S.; Souza, Gustavo Soares de; Silva, Samuel de Assis

doi:10.1590/s0100-67622013000300017

Cited by 12 publications

(11 citation statements)

References 14 publications

(12 reference statements)

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“…The internal and external faces of the initial and senile stages showed significant differences. Flocculation degree is inversely proportional to the natural clay content, and soils with lower values are more vulnerable to water erosion (Lima et al, 2013). The observed pattern may be related to the removal of naturally dispersed clay particles via the erosive process, in which only flocculated particles remain, increasing the degree of flocculation.…”

Section: Resultsmentioning

confidence: 94%

Physical and chemical attributes of soil on gully erosion in the Atlantic forest biome

et al. 2020

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Soil is a fundamental natural resource for subsistence and development of humanity, exploited mainly for agriculture. Agricultural practices, though, are improperly performed, compromising edaphic conditions and favoring erosive processes, which mainly culminate in the loss of soil and nutrients. Water erosion represents the main form of soil degradation, given that the impact of raindrops on the soil results in the detachment of particles, a process favored by factors such as climate, relief, soil vegetation and use and occupation. The objective of the study was to classify four gullies based on their evolutionary turns and to judge the physical-chemical classifications of the soil at the internal and external faces of the gullies. The morphology of the gullies was classified by aerial images generated by drones. The gullies were mapped using Google Earth images from 2016. The qualitative assessment was performed using the digital field-elevation curvature (MDESC) model with field validation. Deformed samples were collected at depths of 0-10 and 10-20 cm, while non-deformed samples were collected at depths of 0.0-0.10 cm to evaluate their chemical and physical attributes. A nonparametric 5% Kruskal-Wallis statistical analysis was performed on the resulting data. The chemical and physical attributes of the soil differed according to the evolutionary stage of the surfaces (internal and external) at depths of 0 to 10 cm, while the faces showed differences in depth of 10 to 20 cm.

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Section: Resultsmentioning

confidence: 94%

Physical and chemical attributes of soil on gully erosion in the Atlantic forest biome

et al. 2020

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“…Segundo Ortiz (2003), utilizando a estatística clássica e a geoestatística em seu estudo, verificou que atributos físicos do solo, como a estrutura e a textura, mostram ser mais importantes na determinação do potencial produtivo (índice de sítio) do que os atributos químicos. Afirma ainda que, em regiões mais baixas de uma área, menores cotas ocorrem maiores concentrações de areia total, com maior porosidade e permeabilidade, beneficiando a aeração, penetração e crescimento do sistema radicular, favorecendo a absorção de nutrientes e água pelas raízes do eucalipto.…”

Section: Discussionunclassified

“…Diversos estudos têm mostrado que atributos físicos e químicos do solo, bem como os relativos às plantas, apresentam variabilidade espacial e que a distância entre as amostras deve ser levada em consideração no estudo desses atributos, como preconiza a geoestatística (SILVA et al, 2010;LIMA et al, 2013). Conhecer a distribuição espacial das frações granulométricas permite interpretar a disponibilidade dos elementos químicos no solo, como relatado por Silva et al (2010).…”

Section: Introductionunclassified

Distribuição espacial das frações granulométricas argila e areia total em um Latossolo Vermelho-Amarelo

et al. 2014

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SPATIAL DISTRIBUTION OF CLAY AND TOTAL SAND SIZE FRACTIONS IN A OXISOL INTRODUÇÃONovas tecnologias utilizadas na área agrária têm facilitado na determinação da variabilidade espacial e temporal de atributos, no seu mapeamento e nas suas correlações, considerando a distância entre as amostras de maneira a representar com maior precisão os fatores que afetam o rendimento das culturas (LIMA et al., 2010). Segundo Corá et al. (2004), os processos e os atributos do solo que determinam o desempenho e a produção das culturas, bem como o impacto da agricultura ao meio ambiente, variam no espaço e no tempo.Diversos estudos têm mostrado que atributos físicos e químicos do solo, bem como os relativos às plantas, apresentam variabilidade espacial e que a distância entre as amostras deve ser levada em consideração no estudo desses atributos, como preconiza a

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“…Without correcting these soils, eucalyptus, like other crops, has its development impaired, since it finds impediments to the growth of the root system, responsible for the absorption of water and nutrients necessary for the crop cycle, thus affecting productivity (Costa et al, 2015). Lima et al (2013) showed that the physical and chemical attributes of the soil, as well as those related to plants, present spatial variability and that the distance between the samples should be taken into account in the study of these attributes, as recommended by geostatistics. Knowing the spatial distribution of the granulometric fractions allows to analyze correctly the availability of the chemical elements in the soil, as reported by Silva et al (2010).…”

Section: Introductionmentioning

confidence: 99%

Specific Management Areas as a Function of Dendrometric Properties of Eucalyptus and Physical-Chemical Attributes in an Oxisol

Galindo¹,

Montanari²,

Martins³

et al. 2018

JAS

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Eucalyptus cultivation has expanded considerably in Brazil, especially in regions where soils have low fertility, as in the Brazilian Cerrado (Brazilian Savannah). In order to achieve high yield, it is necessary to know the appropriate time and place to perform the soil management, and to assist in this decision-making process, mathematical and computational models has been used and are a promising alternative. The objective of this study was to model the influence of plant and soil physical-chemical attributes on Eucalyptus camaldulensis cultivation in an Oxisol (Latossolo Vermelho distrófico), with clayey texture with the purpose of demonstrating specific management areas closely associated with eucalyptus development. An experimental grid of approximately 2 hectares (ha) containing 40 sampling points were installed and later soil and plant attributes were collected for the determination of physical and chemical attributes in the 0-0.20 m and 0.20-0.40 m layers in Selvíria, MS, Brazil. The results were analyzed using classical and geostatistical statistics. The spatial dependence varied according to the physical attribute evaluated and the depth of sampling. In addition to the vertical variability, there was also horizontal variability between depths, since for the same attribute the range was different between the sampled layers.

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Distribuição espacial da matéria orgânica, grau de floculação e argila dispersa em água em área de vegetação natural em regeneração e pastagem

Cited by 12 publications

References 14 publications

Physical and chemical attributes of soil on gully erosion in the Atlantic forest biome

Physical and chemical attributes of soil on gully erosion in the Atlantic forest biome

Distribuição espacial das frações granulométricas argila e areia total em um Latossolo Vermelho-Amarelo

Specific Management Areas as a Function of Dendrometric Properties of Eucalyptus and Physical-Chemical Attributes in an Oxisol

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