142 results

Sugarcane cultivation as a major surface source of sediment in catchments from a coastal zone of Pernambuco, Brazil

Rennan Cabral Nascimento ORCID logo , Angelo Jamil Maia ORCID logo , Pedro Henrique Santos de Oliveira ORCID logo , Ygor Jacques Agra Bezerra da Silva ORCID logo , Clístenes Williams Araújo do Nascimento ORCID logo , Tales Tiecher ORCID logo , [...]

18/Jul/2024

ABSTRACT Identifying sediment sources is fundamental for protecting and improving soil and water quality. Conventional fingerprinting studies have often collected sediments at the overall watershed outlet only, resulting in an important spatial scale dependency. This study aimed to identify and to assess the delivery patterns of sediment sources within three priority sub-catchments (Sapocaji, Piedade and Minas) located in the downstream portion of the Ipojuca River watershed in Brazil. This research would build on understanding sediment sources in the studied watershed […]

Visual Abstract

Soil carbon stocks as affected by land-use changes across the Pampa of southern Brazil

Jessica Maciel Machado ORCID logo , Jonathas Carvalhedo Johnson ORCID logo , Carlos Gustavo Tornquist ORCID logo , Elena Polto Taborda ORCID logo , Bruna Raquel Winck ORCID logo

19/Jun/2024

ABSTRACT The “campos” of the Pampa are unique Brazilian ecosystems, which provide key environmental services, including C storage. These grassy ecosystems have been rapidly converted to intensive land-uses, mainly intensive grain crops (soybeans) and Eucalyptus silviculture. These new land-uses could decrease soil C stocks, depending on soil management. This study aimed to assess soil organic carbon (SOC) changes after the conversion of native grasslands to cropland (soybeans/cover crops under no-tillage) and forestry (Eucalyptus). Eight representative sites in this biome were […]

Visual Abstract

Soil organic carbon sequestration under Araucaria angustifolia plantations but not under exotic tree species on a mountain range

Yuri Lopes Zinn ORCID logo , Ricardo Cardoso Fialho ORCID logo , Carlos Alberto Silva ORCID logo

19/Jun/2024

ABSTRACT Plantation forests can be efficient C sinks in biomass and soil organic carbon (SOC), but the latter depends on many factors, including climate. Tropical humid, mountain areas have cooler temperatures, slowing microbial decomposition, and thus can store considerable SOC. However, the effects of forest plantations on SOC of these montane areas are still poorly studied. Here, we aimed to assess changes in SOC, and related soil properties, after conversion of native rainforest to plantations of five tree species, with […]

Visual Abstract

Carbon sequestration potential of pastures in Southern Brazil: A systematic review

Eduardo Erpen Fronza ORCID logo , Alexandre ten Caten ORCID logo , Felipe Bittencourt ORCID logo , Daisy Christiane Zambiazi ORCID logo , Abdon Luiz Schmitt Filho ORCID logo , Hizumi Lua Sarti Seó ORCID logo , [...]

31/May/2024

ABSTRACT Since the industrial revolution, human activities have emitted approximately 2,500 Gt of CO2, increasing the concentration of atmospheric CO2 by 50 % compared to pre-industrial levels. To better understand the potential for mitigating greenhouse gas (GHG) emissions through proper management of degraded pasture areas, we conducted a systematic literature review and identified 23 publications reporting carbon sequestration values for pastures managed under different conditions in the south and southeast regions of Brazil. From this dataset, 17 publications considered to […]

Visual Abstract

Geochemical background and geopedological interactions of selenium in soils from Piauí state, Northeastern Brazil

Gustavo de Sousa de Oliveira Leite ORCID logo , Clístenes Williams Araújo do Nascimento ORCID logo , Rennan Cabral Nascimento ORCID logo , Cácio Luiz Boechat ORCID logo , Pâmalla Graziely Carvalho Morais ORCID logo , Paloma Cunha Saraiva ORCID logo , [...]

25/Mar/2024

ABSTRACT Although Selenium (Se) plays a role as a micronutrient for humans through vegetable consumption, it is also recognized as toxic when present in excessive quantities. Therefore, quantifying Se contents in soils can prevent diseases influenced by crop Se deficiency or excess. We aimed to measure background contents, establish quality reference values (QRV) for Se in soils from two Brazilian biomes (Cerrado and Caatinga), and assess how geopedological factors affect Se content and spatial variability. Two hundred and eight composite […]

Visual Abstract

Differential effects on soil water repellency of Eucalyptus and Pinus plantations replacing natural pastures

Maximiliano González-Sosa ORCID logo , Pablo González-Barrios ORCID logo , Oscar José Bentancur ORCID logo , Mario Pérez-Bidegain ORCID logo

11/Mar/2024

ABSTRACT Land-use changes from native pastures to forest plantations in humid temperate areas have raised concerns about their potential impact on the environment. This study aimed to assess the effects of such changes on soil water properties, focusing on the impact of the forest species planted and their relationship with changes in soil C content. Specifically, we aimed to identify the development of surficial soil hydrophobicity and changes in soil water holding capacity. A long-term forest experiment with variable planting […]

Visual Abstract

Carbon and nitrogen stocks in a Rhodic Nitisol under different tillage methods and mineral and organic fertilizers

Camila Rosana Wuaden ORCID logo , Rodrigo da Silveira Nicoloso ORCID logo , Paulo Cezar Cassol ORCID logo , Caroline Aparecida Matias ORCID logo , Letícia Paweukievicz ORCID logo

07/Dec/2023

ABSTRACT Changes in soil management, for example by more vigorous crops, adoption of conservation tillage and optimization of fertilization, can increase soil organic carbon (SOC) and total nitrogen (TN) stocks. We hypothesized that corn – black oat rotation under no-tillage (NT) and adequate soil fertilization can increase these stocks, compared to conventional tillage (CT). This study compared these two tillage methods and organic with mineral fertilizers, regarding their effects on C and N cycling and SOC and TN stocks in […]

Slope position controls prescribed fire effects on soil: a case study in the high-elevation grassland of Itatiaia National Park

Ana Paula Pessim de Oliveira ORCID logo , Eduardo Carvalho da Silva Neto ORCID logo , Robson Altiellys Tosta Marcondes ORCID logo , Marcos Gervasio Pereira ORCID logo , Marcelo Souza Motta ORCID logo , Yan Vidal de Figueiredo Gomes Diniz ORCID logo , [...]

28/Nov/2023

ABSTRACT There is a need for greater knowledge about the medium- and long-term effects of prescribed fire management on soil in ecosystems prone to wildfires and more vulnerable to climate change. This study examined the short- and medium-term effects of prescribed fire on soil chemical properties and chemical fractions of soil organic matter (SOM) in two positions of the landscape in a high-elevation grassland environment. The ecosystem is located in the mountain peaks of southeastern Brazil associated with the Atlantic […]

Visual Abstract

Establishing environmental soil phosphorus thresholds to mitigate its transfer to water bodies in Mato Grosso State, Brazil

Walquiria Chaves da Silva ORCID logo , Paulo Cezar Cassol ORCID logo , Rodrigo da Silveira Nicoloso ORCID logo , Gilmar Luiz Mumbach ORCID logo , Daniel João Dall''Orsoletta ORCID logo , Douglas Luiz Grando ORCID logo , [...]

28/Nov/2023

ABSTRACT Excessive phosphorus (P) applications can increase nutrient levels in the soil, facilitating its transference to aquatic environments and causing contamination. Thus, the environmental P threshold (P-threshold) is a tool to establish a sound level of P in the soil, in which P values below the threshold are harmless to the environment. This study aimed to establish a P-threshold equation for the soils of Mato Grosso State, Brazil. Twenty samples of representative soils from the main swine production regions of […]

Visual Abstract

Hydropedological digital mapping: machine learning applied to spectral VIS-IR and radiometric data dimensionality reduction

Priscilla Azevedo dos Santos ORCID logo , Helena Saraiva Koenow Pinheiro ORCID logo , Waldir de Carvalho Carvalho ORCID logo , Igor Leite da Silva ORCID logo , Nilson Rendeiro Pereira ORCID logo , Silvio Barge Bhering ORCID logo , [...]

03/Oct/2023

ABSTRACT Pedosphere-hydrosphere interface accounts for the association between soil hydrology and landscape, represented by topographic and Remote Sensing data support and integration. This study aimed to analyze different statistical radiometric and spectral data selection methods and dimensionality reduce environment-related data to support the classification of soil physical-hydric properties, such as soil basic infiltration rate (bir) and saturated hydraulic conductivity (Ksat); as well as to act in data mining processes applied to hydropedological properties digital mapping. Accordingly, research integrated information from […]

Visual Abstract
1 2 3 4 15