Curvatura Da Superfície E Seu Efeito Na Variabilidade Espacial Dos Atributos Do Solo, Pinheiral - Rj / Br

Santos, Gilsonley Lopes dos; Pereira, Marcos Gervásio; Lima, Sandra Santana de; Ceddia, Marcos Bacis; Mendonça, Victória Maria Monteiro; Delgado, Rafael Coll

doi:10.1590/01047760201622042184

Cited by 8 publications

(5 citation statements)

References 21 publications

(19 reference statements)

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“…Com base na metodologia proposta por (Cambardella et al 1994), variaram de moderado a forte dependência espacial (Tabela 2), o maior alcance constatado foi para o Ca + Mg com 339m, indicando maior continuidade espacial e já o menor alcance foi para o fósforo com 171 m. Os valores de alcance influenciam diretamente na estimativa. Os atributos que apresentam maior alcance de dependência espacial tendem a se apresentar mais homogêneos espacialmente (Santos et al 2016).…”

Section: Resultsunclassified

Dispersão Espacial de Atributos Químicos do Solo de um Açaizeiro na Região Amazônica

Barros¹,

Silva²,

Maciel³

et al. 2022

Anu. Inst. Geociênc.

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ResumoA Amazônia tem despertado a atenção dos produtores no plantio de açaizeiros, muitos deles, buscam inovar técnicas de cultivo que possam auxiliar nas tomadas de decisões na agricultura, visando desenvolver sistemas de cultivo apropriados para aumentar a produtividade. Objetivo deste trabalho foi avaliar a variabilidade espacial dos atributos químicos do solo e sua interação com o cultivo do açaí (Euterpe oleracea Mart.), localizada na fazenda Fonte Nova no Município do Acará-PA. Os dados foram submetidos a estatísticas descritivas e teste de normalidade de Shapiro-Wilk. Para os elementos químicos do solo avaliou-se ainda a dependência espacial, geração modelos dos semivariogramas e mapas de krigagem. Por fim foi realizada uma matriz de correlação entre os atributos estudados. Os resultados mostraram que a maior parte das variáveis químicas do solo apresentou dependência espacial, indicando que o número de amostras coletadas e os pontos plotados foram suficientes para mapear área do plantio, por meio das técnicas geoestatísticas. Os modelos teóricos predominantes no estudo foram esférico, gaussiano e o exponencial. As variáveis apresentaram moderada correlação. Percebeu-se que os mapeamentos dos atributos do solo e do plantio foram importantes para identificação das áreas com diferentes níveis de fertilidades e as regiões com maiores potenciais produtivos.

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Section: Resultsunclassified

Dispersão Espacial de Atributos Químicos do Solo de um Açaizeiro na Região Amazônica

Barros¹,

Silva²,

Maciel³

et al. 2022

Anu. Inst. Geociênc.

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“…Flat areas are more stable environments, resulting in less movement of soil and water in relation to concave areas. This stability promotes the establishment of propagules during the natural regeneration processes (Santos et al 2016).…”

Section: Discussionmentioning

confidence: 98%

Combining regional to local restoration goals in the Brazilian Atlantic forest

et al. 2021

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To achieve regional and international large-scale restoration goals with minimum costs, several restoration commitments rely on natural regeneration, a passive and inexpensive strategy. However, natural regeneration potential may vary within the landscape, mainly due to its historical context. In this work, we use spatially explicit restoration scenarios to explore how and where, within a given region, multiple restoration commitments could be combined to achieve cost-effectiveness outcomes. Our goal is to facilitate the elaboration of forest restoration plans at the regional level, taking into consideration the costs for active and passive restoration methods. The approach includes (1) a statistical analysis to estimate the natural regeneration potential for a given area based on alternative sets of biophysical, land cover, and/or socioeconomic factors and (2) the use of a land change allocation model to explore the cost-effectiveness of combining multiple restoration commitments in a given area through alternative scenarios. We test our approach in a strategic region in the Brazilian Atlantic Forest Biome, the Paraiba Valley in São Paulo State. Using the available data for 2011, calibrated for 2015, we build alternative scenarios for allocating natural regeneration until 2025. Our models indicate that the natural regeneration potential of the region is actually very low, and the cost-effectiveness outcomes are similar for all scenarios. We believe our approach can be used to support the regional-level decision-making about the implementation of multiple commitments aiming at the same target area. It can also be combined with other approaches for more refined analysis (e.g., optimization models).

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“…The predominant soils in the Cachimbal Creek sub-basin are on the hillside, Ultisol (Argissolos Vermelho-Amarelos) and Inceptisol (Cambissolo Háplico), and summit and backslope of the hillside, Oxisol (Latossolos Vermelho-Amarelos) (Santos et al, 2017). According to Santos et al (2016), the sub-basin's altitude varies from 360 m at the mouth of the Cachimbal Stream to 720 m in the Arrozal mountain range. Approximately 72% of the subbasin is comprised of hillsides with slopes, 22.3% of narrow cultivated plains, and 5.7% of hilltop areas.…”

Section: Methodsmentioning

confidence: 99%

“…Arthur et al (2014) and Santos et al (2016) found that small variations in relief forms influence the variability in edaphic factors. The pattern observed in SI may be associated with spontaneous natural regeneration that occurs in the interior, which is the only parameter showing this pattern.…”

Section: Axismentioning

confidence: 99%

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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Curvatura Da Superfície E Seu Efeito Na Variabilidade Espacial Dos Atributos Do Solo, Pinheiral - Rj / Br

Cited by 8 publications

References 21 publications

Dispersão Espacial de Atributos Químicos do Solo de um Açaizeiro na Região Amazônica

Dispersão Espacial de Atributos Químicos do Solo de um Açaizeiro na Região Amazônica

Combining regional to local restoration goals in the Brazilian Atlantic forest

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

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