Soil attributes under agroecosystems and forest vegetation in the coastal tablelands of northestern Brazil

Gomes, J. B. V.; Fernandes, Marcelo Ferreira; Barreto, Antônio Carlos; Filho, J. C. de Araújo; Curi, Nilton

doi:10.1590/s1413-70542012000600007

Cited by 16 publications

(13 citation statements)

References 33 publications

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“…The agroecosystem of coastal tablelands in Brazil has been discussed in studies on the soil quality in these areas Gomes et al, 2012). These tableland regions are socially relevant due to the great importance for the national livestock and agriculture sector, mainly for citrus and sugar cane production and extensive and semi-extensive livestock (Cintra et al, 2004;Souza et al, 2006;Silva et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Structural quality of polyacrylamide-treated cohesive soils in the coastal tablelands of Pernambuco

Melo

Almeida

Souza

et al. 2014

Rev. Bras. Ciênc. Solo

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SUMMARYWater-soluble polymers are characterized as effective flocculating agents due to their molecular features. Their application to soils with horizons with structural problems, e.g, a cohesive character, contributes to improvements in the physical quality and thus to the agricultural suitability of such soils. The purpose of this study was to evaluate the structural quality of soils with cohesive horizons of coastal tablelands in the State of Pernambuco treated with polyacrylamide (PAM) as chemical soil conditioner. To this end, three horizons (one cohesive and two noncohesive) of a Yellow Argisol (Ultisol) were evaluated and to compare cohesive horizons, the horizon of a Yellow Latosol (Oxisol) was selected. The treatments consisted of aqueous PAM solutions (12.5; 50.0; 100.0 mg kg -1 ) and distilled water (control). The structural aspects of the horizons were evaluated by the stability (soil mass retained in five diameter classes), aggregate distribution per size class (mean weight diameter-MWD, geometric mean diameter -GMD) and the magnitude of the changes introduced by PAM by measuring the sensitivity index (Si). Aqueous PAM solutions increased aggregate stability in the largest evaluated diameter class of the cohesive and non-cohesive horizons, resulting in higher MWD and GMD, with highest efficiency of the 100 mg kg -1 solution. The cohesive horizon Bt1 in the Ultisol was most sensitive to the action of PAM, where highest Si values were found, but the structural quality of the BA horizon of the Oxisol was better in terms of stability and aggregate size distribution.Index terms: anionic polymer, coagulation/flocculation, aggregate stability.( RESUMO: QUALIDADE ESTRUTURAL DE SOLOS COESOS DOS TABULEIROS COSTEIROS DE PERNAMBUCO TRATADOS COM POLIACRILAMIDAPolímeros solúveis em água caracterizam-se como eficientes agentes floculantes relacionados aos seus aspectos moleculares, cuja aplicação em solos com horizontes que apresentam problemas estruturais, como acontece com o caráter coeso, favorece a melhoria da qualidade física e, assim, amplia a aptidão agrícola desses solos. Esta pesquisa teve como objetivo avaliar a qualidade estrutural de solos com horizontes coesos dos Tabuleiros Costeiros de Pernambuco com a aplicação de Poliacrilamida (PAM) como condicionador químico. Para isso, foram avaliados três horizontes (um coeso e dois não coesos) de um Argissolo Amarelo e, para fins comparativos de horizontes coesos, foi selecionado o horizonte de um Latossolo Amarelo. Como tratamentos, foram aplicadas soluções aquosas de PAM (12,5; 50,0; e 100,0 mg kg -1 ) e água destilada (controle). Os aspectos estruturais dos horizontes foram avaliados pela estabilidade (massa de solo retida em cinco classes de diâmetro), distribuição de agregados por classe de tamanho (diâmetro médio ponderado -DMP, diâmetro médio geométrico -DMG) e magnitude das alterações promovidas pela PAM, medindo o índice de sensibilidade (Is). As soluções aquosas de PAM aumentaram a estabilidade de agregados na maior classe de diâmetro avaliada dos...

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Section: Introductionmentioning

confidence: 99%

Structural quality of polyacrylamide-treated cohesive soils in the coastal tablelands of Pernambuco

Melo

Almeida

Souza

et al. 2014

Rev. Bras. Ciênc. Solo

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“…Gomes et al . () reported that the amount of organic carbon in soil does not necessarily correlate to the total amount of soil silt or clay particles; in other words, the level of clay particles in soil is not an indispensable condition for the formation of organo‐mineral complexes.…”

Section: Affinity Of Different Organics Towards Minerals and The Stabmentioning

confidence: 99%

“…In addition, Tunega et al (2009) found that the sorption of organic molecules on the surface of soil minerals showed a shape-based selectivity by using a computational chemistry method. Gomes et al (2012) reported that the amount of organic carbon in soil does not necessarily correlate to the total amount of soil silt or clay particles; in other words, the level of clay particles in soil is not an indispensable condition for the formation of organo-mineral complexes.…”

Section: Affinity Of Different Organics Towards Minerals and The Stabmentioning

confidence: 99%

The Challenge of Improving Coastal Mudflat Soil: Formation and Stability of Organo‐mineral Complexes

et al. 2017

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The mudflats along the east coast of China can be important alternative sources for arable lands after amendment. The newly reclaimed mudflats as typical saline soils are not suitable for cultivation owing to high salinity and nutrient deficiencies. The key to amending mudflat saline soils into fertile soils is to reduce salinity in the top layer of soil. Salinity reduction is usually accomplished through rainfall and freshwater irrigation. However, lack of good soil aggregation status might attribute to salt solution rise through soil capillary. Increasing soil organic matter promoted the formation of organo‐mineral complexes and clustered soil aggregates, which is a prerequisite of hindering re‐salinization, improving fertility and facilitating the evolution of coastal mudflat soil into agricultural soil. Research on the formation of clustered soil aggregates during the evolution of mudflat soil into fertile soil should focus on the formation mechanism, influencing factors and regulatory mechanism of organo‐mineral complexes in the early stage after organic matter enters the soil. In addition, exploration of the effects of the special properties of mudflat soil, for example, high saline, high pH and low levels of clay particles, on the formation and stability of organo‐mineral complexes in soil is necessary. Research on this topic can provide scientific evidences to efficiently utilize organic resources and accelerate the evolution of mudflat soil into agricultural soil. Copyright © 2017 John Wiley & Sons, Ltd.

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“…Brenan (Monteiro et al 2006), and other hardwood species (Lucena et al 2007;Ramos et al 2008;Fernandes et al 2017). Forest coverage enables changes in the physical (Martinkoski et al 2017), chemical and biological attributes of soil (Gomes et al 2012;Silva et al 2015;Chandra et al 2016;Medeiros et al 2017), and can modify microenvironments (Joly et al 2017), thus affecting the sustainability of forest ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Biological and chemical attributes of soils under forest species in Northeast Brazil

Weber

Silva

et al. 2019

J. For. Res.

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Timber forests contribute to the sustainable development of the biomes in tropical regions. The aim of this study was to evaluate the biological and chemical properties of the soil as a consequence of the cover with native and non-native species in the Acaraú basin, a transition area from the coast to the Brazilian semi-arid region. Areas planted with four native species (Anadenanthera colubrina, Astronium fraxinifolium, Handroanthus impetiginosus, Colubrina glandulosa) and three exotic species (Acacia mangium, Casuarina equisetifolia, Eucalyptus urophylla) plus a non-forested agricultural area were evaluated for organic carbon contents, and microbial and chemical soil properties. The levels of soil organic carbon were highest in A. colubrina and C. equisetifolia plantations. Low basal soil respiration was observed but the microbial biomass was particularly low in the non-forested area. In the C. equisetifolia, E. urophylla, and H. impetiginosus plantations, elevated soil metabolic quotients were found. The A. colubrina and H. impetiginosus plantations had the highest levels of easily extracted-glomalin related soil protein. Tree species affect concentrations of essential nutrients and the biological quality of the soil in different ways. They can also improve the biological and chemical properties of the soil in the coastal plains of tropical regions. Keywords Soil quality Á Brazilian timber species Á Eucalyptus Á Acacia Á Casuarina Project funding: Selection of species and definition of technical parameters for plantations of forest species in the State of Ceará, Brazil (Embrapa).

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Soil attributes under agroecosystems and forest vegetation in the coastal tablelands of northestern Brazil

Cited by 16 publications

References 33 publications

Structural quality of polyacrylamide-treated cohesive soils in the coastal tablelands of Pernambuco

Structural quality of polyacrylamide-treated cohesive soils in the coastal tablelands of Pernambuco

The Challenge of Improving Coastal Mudflat Soil: Formation and Stability of Organo‐mineral Complexes

Biological and chemical attributes of soils under forest species in Northeast Brazil

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