Variabilidade espacial da estabilidade de agregados e estoque de carbono em Cambissolo e Argissolo

Alho, Leandro Coutinho; Campos, Milton César Costa; Silva, Douglas Marcelo Pinheiro da; Mantovanelli, Bruno Campos; Souza, Zigomar Menezes de

doi:10.1590/s1983-40632014000300001

Cited by 16 publications

(21 citation statements)

References 17 publications

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“…One of the most efficient ways to detect changes in soil physical attributes is to analyze and describe spatial variability data by geostatistics techniques to elucidate the maximum inter-correlation of variable and its contribution to soil alteration in a crop area (Alho et al, 2014). This method can correlate soil attributes and crop yield according to the observed variations (Montanari et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Variability of physical attributes in tropical weathered soil cultivated with irrigated beans (Phaseolus vulgaris L.)

et al. 2019

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Soil physical attributes are affected by several events. The ability to identify the variation of those attributes can be used to decide the best crop management. Although it is known that smaller grids are more representative, predicting the least number of points while maintaining accuracy is a tool that might reflect a gain in yield and time. The aims of this study were to evaluate the spatial physical variability and to define the minimum sampling density in a tropical Typic Haplustults soil using a scaled semivariogram in a central pivot area with pinto bean (Phaseolus vulgaris L.) after the eighth bean harvest in Cristalina, Goias State. Soil samples were collected at a regular grid of 10-m intervals, totaling 180 points, and at depths of 0.00–0.10 m, 0.10–0.20 m, and 0.20–0.30 m to determine total sand content (TS), silt (SIL), clay (CL), water-dispersed clay (WDC), mean weight diameter of soil aggregates (MWD), soil penetration resistance (PR), soil macroporosity (Ma), soil microporosity (Mi), and soil bulk density (BD). The results demonstrated that management promoted superficial soil compaction with increasing BD and Mi and decreasing Ma and TP. The scaled semivariogram demonstrated similarity between attributes in the three studied soil layers, evidencing strong spatial dependency. The sample density showed a strong influence of WDC in the irrigated soil properties. Adoption of a scaled semivariogram is a strategy that can be used to determine a minimum number of points that represents the spatial variability of soil physical attributes and to assist the best management in irrigated soils.

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Section: Introductionmentioning

confidence: 99%

Variability of physical attributes in tropical weathered soil cultivated with irrigated beans (Phaseolus vulgaris L.)

et al. 2019

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“…Estudos recentes com variabilidade espacial têm sido utilizados com grande êxito em diversos cenários amazônicos, dentre os quais, destacam-se: estabilidade de agregados e estoque de carbono em campo natural e floresta (Alho et al, 2014); atributos físicos em área de agrofloresta (Campos et al, 2013); atributos físicos em área de pastagem/floresta (Aquino et al, 2014a). onde: γ(h) -valor da semivariância para uma distância h; N(h) -número de pares envolvidos no cálculo da semivariância; Z(x i ) -valor do atributo Z na posição x i ; Z(x i +h) -valor do atributo Z separado por uma distância h da posição x i .…”

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Variabilidade espacial dos atributos físicos do solo em área de Terra Preta Arqueológica sob pastagem em Manicoré, AM

Soares¹,

Campos

Souza³

et al. 2015

RCA

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RESUMO: Na Região Amazônica, as áreas com Terras Pretas Arqueológicas (TPAs) são cada vez mais fragmentadas devido ao desmatamento e ao uso agropecuário, o que provoca modificações principalmente nos atributos físicos do solo. O objetivo foi verificar a variabilidade espacial dos atributos físicos do solo em área de terra preta arqueológica sob pastagem na região de Manicoré, AM. Foi estabelecida uma malha amostral com dimensões 0.00-0.05; 0.05-0.10; 0.10-0.20; 0.20-0.30m ABSTRACT: In the Amazon region, areas with Archaeological Black Earths (ABE's) are increasingly fragmented due to deforestation and agricultural use, which mainly changes the soil physical properties. This study aimed to determine the spatial variability of soil physical properties in archaeological black earth area under pasture in Manicore Amazon region. A sampling mesh with dimensions of 80 × 56 m was established with 88 sampling points, at regular intervals of 08m at depths

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“…These results show the great importance of C in aggregation of soil particles (Alho et al, 2014). Even in areas of ADE with a history of more than 14 years under cultivation, soil properties had spatial dependence and low spatial variation.…”

Section: Resultsmentioning

confidence: 64%

Spatial Variability of Soil Properties in Archeological Dark Earth Sites under Cacao Cultivation

Silva

Campos

Franciscon

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:Soils with an A horizon formed by human activity, an anthropogenic A horizon, are found in the Amazon Region. Few studies have examined the spatial distribution of the properties of these soils. We mapped the spatial variability of some soil properties in an area of Archaeological Dark Earth (ADE) in the Brazilian Amazon. A sampling grid was defined over an area of 42 × 88 m under cacao cultivation in which sampling points were established at a spacing of 6 × 8 m, for a total of 88 points. Samples were collected from the 0.00-0.05, 0.05-0.10, 0.10-0.20, and 0.20-0.30 m depth layers. Soil texture, aggregate stability, and organic carbon (OC) analyses were performed on disturbed soil samples. Undisturbed samples were used to determine soil macroporosity (Macro), microporosity (Micro), total porosity (TP), and soil resistance to penetration (RP). The results were analyzed by descriptive statistic, Pearson correlation (p<0.01), and geostatistics. Soil bulk density, total pore volume, and geometric mean diameter are dependent on the total amount of OC in the ADE area. Increased soil bulk density and RP are proportional to a decrease in OC content and lower Micro and TP. Moreover, soil resistance to penetration is influenced by soil water and clay content with depth.

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Variabilidade espacial da estabilidade de agregados e estoque de carbono em Cambissolo e Argissolo

Cited by 16 publications

References 17 publications

Variability of physical attributes in tropical weathered soil cultivated with irrigated beans (Phaseolus vulgaris L.)

Variability of physical attributes in tropical weathered soil cultivated with irrigated beans (Phaseolus vulgaris L.)

Variabilidade espacial dos atributos físicos do solo em área de Terra Preta Arqueológica sob pastagem em Manicoré, AM

Spatial Variability of Soil Properties in Archeological Dark Earth Sites under Cacao Cultivation

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