Manipulation of the soil pore and microbial community structure in soil mesocosm incubation studies

Sleutel, Steven; Bouckaert, Liesbeth; Buchan, David; Loo, Denis Van; Cornelis, Wim; Sanga, H.G.

doi:10.1016/j.soilbio.2011.09.016

Cited by 55 publications

(36 citation statements)

References 26 publications

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“…This also implied that even with a slight change in the volume of small macropores (30-100 µm), soil CO 2 efflux will also be affected. The results from the present study confirmed the finding by Sleutel et al [15] that soil pore size distribution could play an important regulatory role in C decomposition processes and C may accumulate in different pore classes. With regard to different soil pores, only small macropores affected CO 2 efflux significantly.…”

Section: Relationship Between Soil Co 2 Efflux and Pore Size Distribusupporting

confidence: 92%

“…This occurs as increases in soil bulk density reduce gas diffusivity, which is linked with oxidation rate, and consequently rates of soil respiration and CO 2 emission [14]. Sleutel et al [15] also attributed reduced CO 2 efflux in compacted soil to reduced gas diffusivity rather than to any direct influence on the function of the soil microbial community. Pearson correlation coefficients between soil CO 2 efflux and bulk density were greater under RT than NT, and for the RT plot achieved a markedly significant correlation (p<0.01) (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Effects of Soil Compaction and Tillage Practices on Carbon Dioxide Efflux in Northeast China: Evidence from an Incubation Study

Chen¹,

Yang²,

Liang³

et al. 2016

Pol. J. Environ. Stud.

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Limited information is available for how soil compaction affects carbon dioxide (CO 2 ) efflux under different tillage systems. To improve understanding of the effects of compaction and tillage on soil CO 2 efflux, an incubation study consisting of no tillage (NT), moldboard plow (MP), and ridge tillage (RT) was conducted to explore the relationships between CO 2 efflux and bulk density, as well as pore size distribution under different levels of bulk densities, and the thresholds of bulk density and the volume of pore size above which CO 2 efflux were affected in northeast China. Results showed that there was a significantly negative correlation (r = -0.990, p<0.05; r = -0.986, p<0.05; and r = -0.992, p<0.01, respectively, for NT, MP, and RT) between CO 2 efflux and bulk density, whereas the correlation was significantly positive (r ranges from 0.75 to 0.85, p<0.05 for each tillage practice under bulk densities of 1.0-1.6 g/cm 3 ) for the volume of small macropores (30-100 µm). The critical value of bulk density for impeding CO 2 efflux was more produced in 1.6 g/cm 3 and the volume of small macropores affected CO 2 efflux variation greatly. Ridge tillage is a better tillage practice for impeding soil CO 2 efflux than no tillage, as evidenced by the lesser volume of small macropores.

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Section: Relationship Between Soil Co 2 Efflux and Pore Size Distribusupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Effects of Soil Compaction and Tillage Practices on Carbon Dioxide Efflux in Northeast China: Evidence from an Incubation Study

Chen¹,

Yang²,

Liang³

et al. 2016

Pol. J. Environ. Stud.

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“…Lack of human interference and elevated OM content in NV might be possible explanations for GMD increase (Table 3). Once OM fractions act in soil structure stabilization (SALTON et al, 2008;SLEUTEL et al, 2012) by enhancing bond strength of mineral particles, which play an important role in aggregate stabilization and formation (BRAIDA et al, 2008;COSTA JUNIOR et al, 2012). Larger aggregates are usually indicative of good quality, once they own a well pore size distribution.…”

Section: Resultsmentioning

confidence: 99%

Aggregates morphometry in a Latosol (Oxisol) under different soil management systems

et al. 2016

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Changes in soil physical properties are inherent in land use, mainly in superficial layers. Structural alterations can directly influence distribution, stability and especially morphometry of soil aggregates, which hence will affect pore system and the dynamic process of water and air in soil. Among the methods used to measure these changes, morphometry is a complementary tool to the classic methods. The aim of this study was to evaluate structural quality of a Latosol (Oxisol), under different management systems, using morphometric techniques. Treatments consisted of soil under no-tillage (NT); pasture (P), in which both had been cultivated for ten years, and an area under native vegetation (NV -Savannah like vegetation). Aggregates were sampled at depths of 0-0.10 and 0.10-0.20 m, retained on sieves with 9.52 -4.76 mm, 4.76 -1.0mm, 1.0 -0.5mm diameter ranges. Aggregate morphometry was assessed by 2D images from scanner via QUANTPORO software. The analyzed variables were: area, perimeter, aspect, roughness, Ferret diameter and compactness. Moreover, disturbed samples were collected at the same depths to determine particle size, aggregate stability in water, water-dispersible clay, clay flocculation index and organic matter content. It was observed that different soil management systems have modified soil aggregate morphology as well as physical attributes; and management effects' magnitude increased from NT to P. Key words: Image analyses, soil structural quality, conservationist management systems ResumoAs alterações dos atributos físicos do solo, principalmente nas camadas superficiais, são inerentes ao uso do solo. Mudanças estruturais podem influenciar diretamente a distribuição, estabilidade e especialmente a morfometria dos agregados, o que afeta o sistema poroso e todo o processo dinâmico da água e ar no solo. Entre as metodologias que permitem mensurar estas alterações a morfometria apresenta-se como uma ferramenta complementar aos métodos tradicionais. Objetivou-se com esse trabalho avaliar a qualidade estrutural de um Latossolo Vermelho Distroférrico sob diferentes manejos do solo, empregando técnicas morfométricas. Os tratamentos deste estudo foram: o sistema plantio direto (PD), pastagem (P) ambos com dez anos de cultivo e área sob vegetação nativa (VN -Cerrado). Foram amostrados agregados nas camadas de 0-0,10 e 0,10-0,20 m retidos no intervalo de 9,52 -4,76 mm, 4,76 -1,0mm, 1,0 -0,5mm de diâmetro, obtidos por meio de um jogo de peneiras padrão. As análises dos agregados foram realizadas por meio de imagens 2D obtidas via scanner e analisadas com o programa QUANTPORO. As variáveis morfométricas avaliadas foram: Área, Perímetro, Aspecto, Rugosidade, Diâmetro de Ferret e Compacidade. Amostras com estrutura deformada foram coletadas nas mesmas profundidades para as seguintes determinações: granulometria, estabilidade de agregados em água, argila dispersa em água, grau de floculação e o conteúdo da matéria orgânica. Os diferentes sistemas de manejo do solo modificaram a morfometria dos agregado...

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“…Clay soils also have higher internal surface area and cation exchange capacity than sandy soils [39]. There is also evidence that the difference between soil textures is related to pore structure [40] [41]. The effect of adding biochar may therefore be similar to that of increasing clay content.…”

Section: What Is the Mechanism For Biochar Effect?mentioning

confidence: 99%

Biochar in Nutrient Recycling—The Effect and Its Use in Wastewater Treatment

Foereid¹

2015

OJSS

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Manipulation of the soil pore and microbial community structure in soil mesocosm incubation studies

Cited by 55 publications

References 26 publications

Effects of Soil Compaction and Tillage Practices on Carbon Dioxide Efflux in Northeast China: Evidence from an Incubation Study

Effects of Soil Compaction and Tillage Practices on Carbon Dioxide Efflux in Northeast China: Evidence from an Incubation Study

Aggregates morphometry in a Latosol (Oxisol) under different soil management systems

Biochar in Nutrient Recycling—The Effect and Its Use in Wastewater Treatment

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