Atributos físicos, químicos e microbiológicos dos solos sob diferentes usos em topossequências no Noroeste Fluminense

Gama-Rodrigues, Emanuela Forestieri; Araújo, Stefânia Palma; Faustino, Lucas Luís; Moreira, Renato Valadares de Sousa; Paulucio, Vanderlan de Oliveira; Gama-Rodrigues, Antônio Carlos

doi:10.5039/agraria.v13i3a5543

Cited by 8 publications

(6 citation statements)

References 17 publications

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“…Border soils tend to be more influenced by groundwater and erosion processes, in addition to being shallower, which also explains the difference in soil type (Arruda et al, 2015;Guimarães et al, 2021). These results demonstrate that in addition to land use, other factors influence the dynamics of organic matter in the soil of this plateau (Gama-Rodrigues et al, 2018). This is corroborated by the difference in the ratio of δ 15 N to the C/N ratio at each location in the landscape.…”

Section: Discussionsupporting

confidence: 65%

“…Texture and mineralogy also influence soil properties and organic matter behavior (Craine et al, 2015;Singh et al, 2017). Therefore, different landscape locations are determinant of the ecosystem structure and functioning (Arruda et al, 2015), affecting physical, chemical and microbiological attributes of soils (Gama-Rodrigues et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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Soil carbon and nitrogen under different land-use and landscape loca-tions in central Brazil

Santos

Júnior

Reatto

et al. 2021

J. Biotechnol. Biodivers.

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In Central Brazil, plateaus, the most common geomorphologic form, have been undergoing intense conversion from native vegetation to pasture and agriculture in recent decades. We used carbon stable isotope ratios (δ13C) and nitrogen stable isotope ratios (δ15N) to assess possible changes in soil organic matter dynamics under such land use modifications. This study aimed to evaluate the differences in soil δ13C and δ15N and C and N stocks between native vegetation and agricultural or pasture areas in different locations of a plateau in the savannas of Central Brazil. We sampled soil up to 100 cm depth in pasture areas in the summit of the plateau and no-tillage and conventional tillage on the border of a plateau, as well as soils under native vegetation in both landscape locations. Both soil δ13C and δ15N, and C and N stocks showed no differences between land uses. The different relationships between δ15N and C/N ratio at different locations indicated distinct behavior of the soil organic matter between the summit and border of the plateau. Therefore, in addition to land-use, landscape location contributes to both δ13C and δ15N, and C and N stocks in the soil of the plateau.

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Section: Discussionsupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Soil carbon and nitrogen under different land-use and landscape loca-tions in central Brazil

Santos

Júnior

Reatto

et al. 2021

J. Biotechnol. Biodivers.

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“…Soil microbial biomass tends to present higher levels in the summer period, which has higher temperatures and rainfall, due to the presence of plant residues on the soil (Rodrigues et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Soil microbiological indicators in Coffea arabica crops under different weed management strategies

Zaidan

Costa

Santos

et al. 2022

Preprint

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Microbiological variables can be sensitive indicators of changes in the physicochemical properties of soils resulting from disturbances caused by practices of weed management. The objective of this work was to evaluate the impact of weed management strategies on the soil, using microbiological indicators over four-year time measures (two in the dry and two during the rainy weather season). The experiment was carried out in a coffee plantation field (Coffea arabica), in a randomized block design with five treatments. The treatments corresponded to the cultivation of Urochloa ruziziensis and Pueraria phaseoloides managed by mowing, maintenance of spontaneous vegetation and control by mowing, control of spontaneous vegetation by application of herbicides (glyphosate or glyphosate + 2,4-D), and manual weeding using a hoe to maintain the soil without vegetation cover. Soil C – CO2 evolution, basal respiration (RR), biomass carbon (Cbio), and metabolic quotient (qCO2) were evaluated. Treatments with U. ruziziensis and P. phaseoloides presented lower qCO2 values, indicating more stable systems and closer to equilibrium. Cbio was higher in the treatment with P. phaseoloides, indicating better soil fertility and carbon input conditions. The microbiological indicators allowed us to conclude that management methods that form a cover over the soil favor the maintenance of soil quality and the sustainability of the system.

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“…Research indicates that there is an interdependent relationship among soil, relief (the shape of the landscape), and vegetation. The study of toposequence has been utilized to understand the pedogenesis and the current behavior of soil, mainly for establishing relationships between soil attributes and relief (Silva et al, 2007;Meireles et al, 2012;Gama-Rodrigues et al, 2018). However, research on biogenic aggregates of earthworms has mainly focused on the places where they are found and has not studied the impact of the process as a whole.…”

Section: Introductionmentioning

confidence: 99%

Physical, chemical, and mineralogical attributes and organic fractions of biogenic aggregates of earthworms and toposequence of Inceptisol in semi-arid region

et al. 2021

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Earthworms are known to improve soil fertility by altering the physicochemical properties of soil. However, the changes in properties of biogenic aggregates (produced by earthworms) in regions with different vegetation covers and soils of Inceptisol toposequence in the semi-arid region have not been studied. The objective of this work was to determine the variations of the physical, chemical, and mineralogical attributes and organic fractions of biogenic aggregates of earthworms under different vegetation covers and compare them to an Inceptisol toposequence in the semi-arid region of Pernambuco State, Brazil. For this study, four Inceptisol soil profiles were selected. The sampled points were P1-upper; P2-middle third; P3-middle third; and P4-lower slope, and the soils were collected at a depth of 0-0.20 m. The biogenic aggregates were found in the P3 samples collected from three areas with different vegetation covers: an area with mesquite tree vegetation (Prosopis juliflora [Sw] D.C.); an area with neem tree vegetation (Azadirachta indica A. Juss); and an area with forage palm and mesquite tree vegetation (Opuntia sp. and Nopalea sp.). Results indicate that the biogenic aggregates were in the form of irregular blocks with a size greater than 40 mm. As compared to Inceptisol samples, these aggregates tended to select particles of smaller diameter and exhibited higher concentrations of clay minerals. The chemical and organic fraction analysis revealed that the aggregates exhibited higher Ca2+, total organic carbon (TOC), labile and humic substances, regardless of the vegetation cover. The mineralogical analysis revealed that the action of earthworms did not change the quantity or type of clay minerals.

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Atributos físicos, químicos e microbiológicos dos solos sob diferentes usos em topossequências no Noroeste Fluminense

Cited by 8 publications

References 17 publications

Soil carbon and nitrogen under different land-use and landscape loca-tions in central Brazil

Soil carbon and nitrogen under different land-use and landscape loca-tions in central Brazil

Soil microbiological indicators in Coffea arabica crops under different weed management strategies

Physical, chemical, and mineralogical attributes and organic fractions of biogenic aggregates of earthworms and toposequence of Inceptisol in semi-arid region

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