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72 results

Paleoenvironmental Characterization of a High-Mountain Environment in the Atlantic Forest in Southeastern Brazil

Eduardo Carvalho da Silva Neto, Jaqueline Jesus Santana dos Santos, Marcos Gervasio Pereira, Deyvid Diego Carvalho Maranhão, Fabiana da Costa Barros, Lúcia Helena Cunha dos Anjos

02/Nov/2018

ABSTRACT: Records of changes in the phytosociological structure of vegetation can be observed more clearly in soils that have more significant accumulation of organic matter, like those occurring in high-mountain environments. The aim of this study was to characterize soils formed in high-mountain environments in the Itatiaia National Park (INP), state of Rio de Janeiro, southeastern Brazil, and to discuss the potential of preserved phytoliths as markers of vegetative history and environmental factors. Four profiles were selected, which were morphologically […]

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Termite Mounds Effects on Soil Properties in the Atlantic Forest Biome

Sandra Santana de Lima, Marcos Gervasio Pereira, Renato Nunes Pereira, Rafael Moura de Pontes, Celeste Queiroz Rossi

02/Mar/2018

ABSTRACT Termites have peculiar activities in the soil, inducing significant changes in the soil properties. The objective of this study was to assess physical and chemical properties and soil organic matter to evaluate the effect of termite activity and termite mounds on the soil. Two toposequences were selected and divided in slope thirds (shoulder, backslope, and footslope). In each of these, four termite mounds were selected. Samples were taken from the soils and termite mounds (top, center, and base) along […]

Mild and Moderate Extraction Methods to Assess Potentially Available Soil Organic Nitrogen

Bruno Boscov Braos, Manoel Evaristo Ferreira, Mara Cristina Pessôa da Cruz, Lucas Boscov Braos, José Carlos Barbosa

05/Oct/2016

ABSTRACT The use of chemical methods to assess the soil organic nitrogen (N) potentially available to plants is not a common practice in Brazil. However, associated with others, this tool might improve efficiency in the use of waste and nitrogen fertilizers. In our study, chemical methods were tested to assess potentially available soil N in samples of 17 representative soils of the western plateau of the state of São Paulo (10 Oxisols and 7 Ultisols). Available soil N was extracted […]

Liquid Bovine Biofertilizer and Cultivation Effects on the Porosity of a Typic Haplocambids as a Function of Cultivation and Dose

Thiago Leite de Alencar, Arilene Franklin Chaves, Alcione Guimarães Freire, Raimundo Nonato de Assis, Jaedson Cláudio Anunciato Mota

22/Jul/2016

ABSTRACT The soil porous space is where processes related to gases and soil solution occur, and provides an adequate guide for agricultural practices. This study aimed to evaluate the integrated effects of cultivation and the application of liquid bovine biofertilizer on the porous network of a Typic Haplocambids (Cambissolo Háplico Ta Eutrófico) cultivated with figs (Ficus carica L.). Four treatments were evaluated (under fig cultivation with the application of 20, 40 and 60 % of biofertilizer through irrigation, a control […]

Contrasts in Areas of Rubber Tree Clones in Regard to Soil and Biomass Carbon Stocks

Anderson Ribeiro Diniz, Marcos Gervasio Pereira, Fabiano de Carvalho Balieiro, Eduardo Vinicius da Silva, Felipe Martini Santos, Francy Junio Gonçalves Lisboa, [...]

01/Sep/2015

ABSTRACT Rubber tree (Hevea brasiliensis) crop may accumulate significant amounts of carbon either in biomass or in the soil. However, a comprehensive understanding of the potential of the C stock among different rubber tree clones is still distant, since clones are typically developed to exhibit other traits, such as better yield and disease tolerance. Thus, the aim of this study was to address differences among different areas planted to rubber clones. We hypothesized that different rubber tree clones, developed to […]

Physical Properties of a Cultivated Cambisol Treated with Biofertilizer in the Apodi Plateau, Ceará, Brazil

Thiago Leite de Alencar, Arilene Franklin Chaves, Carlos Levi Anastácio dos Santos, Raimundo Nonato de Assis, Jaedson Cláudio Anunciato Mota

01/May/2015

Knowledge of soil physical changes and soil quality is important for creating adequate management strategies to be adopted for soil under crop production. The aim of this study was to evaluate the effects of cultivation and application of biofertilizer (obtained from cattle manure) on the physical quality of a Cambisol planted to Ficus carica L. with a drip irrigation system and to verify the efficiency of indicators in assessing changes in its physical properties. In order to evaluate physical quality, […]

Soil Properties and Carbon Accumulation in an Integrated Crop-Livestock System Under No-Tillage

Nídia Raquel Costa, Marcelo Andreotti, Keny Samejima Mascarenhas Lopes, Kazuo Leonardo Yokobatake, João Paulo Ferreira, Cristiano Magalhães Pariz, [...]

01/May/2015

In production systems such as the integrated crop-livestock system (ICL) under no-tillage, improvements have been observed in chemical, physical, and biological soil properties. Therefore, we aimed to evaluate the changes in chemical and physical soil properties, as well as carbon (C) accumulation, in an Oxisol under irrigated conditions in the Cerrado (Brazilian tropical savanna) in an ICL system under no-tillage. The experiment was carried during the growing of 2010/2011, 2011/2012, and 2012/2013. A randomized block experimental design with four replications […]

Soil solution and principal component analysis for the monitoring of agricultural areas amended with sewage sludge

Aline Renée Coscione, Lívia Fernanda Mendonça Silva, Isabella Clerici De Maria, Cristiano Alberto de Andrade, Vera Lucia Ferracini

01/Oct/2014

The use of sewage sludge in agriculture is a sound alternative for nutrient recycling, but the concern over increase in soluble chemical species from mineralization of organic matter remains. The study of the soil solution is a valuable tool for understanding the availability of nutrients and for assessing the risk of soil and water contamination. For such studies, where the number of parameters examined is usually more than 10, the use of multivariate analysis tools, such as principal component analysis […]

Structural changes and degradation of Red Latosols under different management systems for 20 years

João Tavares Filho, Thadeu Rodrigues de Melo, Wesley Machado, Bruno Vieira Maciel

01/Aug/2014

Soils are the foundation of terrestrial ecosystems and their role in food production is fundamental, although physical degradation has been observed in recent years, caused by different cultural practices that modify structures and consequently the functioning of soils. The objective of this study was to evaluate possible structural changes and degradation in an Oxisol under different managements for 20 years: no-tillage cultivation with and without crop rotation, perennial crop and conventional tillage, plus a forested area (reference). Initially, the crop […]

Oxidizable fractions of total organic carbon and soil macrofauna in a crop-livestock integration system

Itaynara Batista, Maria Elizabeth Fernandes Correia, Marcos Gervasio Pereira, Wanderlei Bieluczyk, Jolimar Antonio Schiavo, Janaína Ribeiro Costa Rouws

01/Jun/2014

The increasing level of land degradation has led to the adoption of agricultural management practices that seek to combine agricultural production and soil conservation. Among these, the practice of Crop-Livestock Integration (CLI) has intensified in West-Central Brazil. In order to assess the long-term effect of the CLI system and seasonality on the community of soil macrofauna and oxidizable fractions of total organic C in croplands and the Cerradão (Brazilian tropical savanna), a study was developed at the Cabeceira Farm in […]

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