CHANGES IN SOIL ORGANIC CARBON UNDER <i>EUCALYPTUS</i> PLANTATIONS IN BRAZIL: A COMPARATIVE ANALYSIS

Fialho, Ricardo Cardoso; Zinn, Yuri Lopes

doi:10.1002/ldr.2158

Cited by 109 publications

(76 citation statements)

References 29 publications

(83 reference statements)

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“…Comparando os diferentes usos às áreas de referência, não é possível observar grandes diferenças nos teores de C org do solo em virtude da textura predominantemente arenosa desses Latossolos, que deixa a matéria orgânica naturalmente exposta a decomposição (Zinn et al, 2002;Fialho & Zinn, 2014). De maneira geral, os teores do C org estiveram diretamente correlacionados com a CTC, independentemente dos usos e das profundidades avaliadas.…”

Section: Resultsunclassified

Características e atributos de Latossolos sob diferentes usos na região Oeste do Estado da Bahia

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Teixeira

Balieiro

et al. 2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar os efeitos de diferentes usos da terra nas características e nos atributos de Latossolos da região Oeste do Estado da Bahia. Os Latossolos apresentavam texturas com fração areia amplamente predominante, e foram avaliados em áreas de cerrado, algodão, soja e feijão, no Município de Luís Eduardo Magalhães. A caracterização morfológica e a coleta de amostras de solos para avaliação dos atributos físicos e químicos por horizontes foram feitas em minitrincheiras, enquanto a avaliação da condutividade hidráulica saturada foi feita com permeâmetro de Guelph em duas profundidades: 0,0-0,20 e 0,20-0,40 m. Os Latossolos avaliados, além de uma estrutura maciça, apresentaram horizonte genético adensado, que, sob uso agrícola, torna-se mais compactado, espesso e superficial, e forma torrões quando revolvido. O uso agrícola reduz a condutividade hidráulica saturada dos Latossolos avaliados nas duas camadas, com exceção do cultivo de feijão.Termos para indexação: Cerrado, camada adensada, compactação de solo, condutividade hidráulica saturada, permeâmetro de Guelph, solos leves. Characteristics and attributes of Oxisols under different land uses in the western region of the state of Bahia, BrazilAbstract -The objective of this work was to evaluate the effects of different land uses on the characteristics and attributes of Oxisols in the western region of the state of Bahia, Brazil. The Oxisols had textures with largely predominant sand fraction, and they were evaluated in areas of cerrado, cotton, soybean, and common bean in the municipality of Luís Eduardo Magalhães. The morphological characterization and the collection of samples for evaluating soil physical and chemical attributes of horizons were carried out in small trenches, while the evaluation of field saturated hydraulic conductivity was done using the Guelph permeameter at two depths: 0.0 to 0.20 and 0.20 to 0.40 m. The evaluated Oxisols, besides their massive structure, showed a dense genetic horizon, which, under agricultural use, becomes more compacted, thick, and shallow, forming clods when plowed. Agricultural use reduces the saturated hydraulic conductivity of the evaluated Oxisols in both layers, except for common bean cultivation.

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Section: Resultsunclassified

Características e atributos de Latossolos sob diferentes usos na região Oeste do Estado da Bahia

Fontana

Teixeira

Balieiro

et al. 2016

Pesq. agropec. bras.

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“…The BSR / MBC ratio indicates the carbon turnover rates in the soils. The importance of soil organic carbon in improving the overall soil quality has been widely reported (Debasish et al, 2014;Fialho and Zinn, 2014;Lozano-García and Parras-Alcántara, 2014). Paz-Ferreiro and Fu (2014) reviewed the limitations of using the biochemical, microbiological, and biological properties of soil for soil quality evaluation.…”

Section: Principal Component Analysis-based Index (Esqi-2)mentioning

confidence: 99%

Assessment of environmental soil quality around Sonepur Bazari mine of Raniganj coalfield, India

et al. 2015

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Abstract. Assessment of soil quality is one of the key parameters for evaluation of environmental contamination in the mining ecosystem. To investigate the effect of coal mining on soil quality, opencast and underground mining sites were selected in the Raniganj coalfield area, India. The physical, chemical, and biological parameters of the soils, and trace metals and PAHs (polycyclic aromatic hydrocarbons) in the soils were evaluated. Soil dehydrogenase (+79 %) and fluorescein (+32 %) activities were significantly higher in underground mine (UGM) soil, whereas peroxidase activity (+57 %) was higher in opencast mine (OCM) soil. Content of As, Be, Co, Cr, Cu, Mn, Ni, and Pb was significantly higher in OCM soil, whereas Cd was higher in UGM. In general, the PAHs contents were higher in UGM soils, probably due to the natural coal burning at these sites. The observed values for the above properties were converted into a unitless score (0-1.00) and the scores were integrated into an environmental soil quality index (ESQI). In the unscreened index (ESQI-1) all the soil parameters were included and the results showed that the quality of the soil was better for UGM (0.539) than the OCM (0.511) soils. Principal component analysis was employed to derive ESQI-2 and accordingly, total PAHs, loss on ignition, bulk density, Be, Co, Cr, Ni, Pb, and microbial quotient (respiration: microbial biomass ratio) were found to be the most critical properties. The ESQI-2 was also higher for soils near UGM (+10.1 %). The observed indicators and the ESQI results revealed that soil quality assessment for these coal mining soils is largely depended on soil PAHs and potentially toxic trace metals. The proposed ESQI may be further refined by incorporating specific parameters related to human exposure risks and exposure pathways.

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“…Such estimates are far lower than the anthropic effects on aboveground organic matter. Soil organic matter stocks of successional forests (secondary regrowth following pastures or shifting cultivation) or of plantation forests differ only marginally and mostly non-significantly relative to paired mature rainforest sites [96][97][98].…”

Section: Anthropic Impacts On Amazonian Sommentioning

confidence: 91%

Improving Farming Practices for Sustainable Soil Use in the Humid Tropics and Rainforest Ecosystem Health

et al. 2016

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Abstract:Unsustainable farming practices such as shifting cultivation and slash-and-burn agriculture in the humid tropics threaten the preservation of the rainforest and the health of the local and global environment. In weathered soils prone to cohesion in humid tropic due to low Fe and carbon content and the enormous amounts of P that can be adsorbed, sustainable soil use is heavily dependent on the availability and efficient use of nutrients. This paper reviews the literature in the field and provides some insights about sustainable soil use in the humid tropics, mainly for the Brazilian Amazonia region. Careful management of organic matter and physical and chemical indicators is necessary to enhance root growth and nutrient uptake. To improve the rootability of the arable layer, a combination of gypsum with continuous mulching to increase the labile organic matter fraction responsible for the formation of a short-lived structure important for root growth is recommended, rather than tillage. Unlike mulching, mechanical disturbance via ploughing of Amazonian soils causes very rapid and permanent soil organic matter losses and often results in permanent recompaction and land degradation or anthropic savannization; thus, it should be avoided. Unlike in other regions, like southeast Brazil, saturating the soil solely with inorganic potassium and nitrogen soluble fertilizers is not recommended. Nutrient retention in the root zone can be enhanced if nutrients are added in a slow-release form and if biologically mediated processes are used for nutrient release, as occurs in green manure. Therefore, an alternative that favors using local resources to increase the supply of nutrients and offset processes that impair the efficiency of nutrient use must be pursued.

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CHANGES IN SOIL ORGANIC CARBON UNDER EUCALYPTUS PLANTATIONS IN BRAZIL: A COMPARATIVE ANALYSIS

Cited by 109 publications

References 29 publications

Características e atributos de Latossolos sob diferentes usos na região Oeste do Estado da Bahia

Características e atributos de Latossolos sob diferentes usos na região Oeste do Estado da Bahia

Assessment of environmental soil quality around Sonepur Bazari mine of Raniganj coalfield, India

Improving Farming Practices for Sustainable Soil Use in the Humid Tropics and Rainforest Ecosystem Health

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