Permeabilidade ao ar em Latossolo Vermelho sob diferentes sistemas de manejo

Rodrigues, Sueli; Silva, Álvaro Pires da; Giarola, Neyde Fabíola Balarezo; Rosa, Jadir Aparecido

doi:10.1590/s0100-06832011000100010

Cited by 23 publications

(33 citation statements)

References 24 publications

(19 reference statements)

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“…In that study, N indicated pores supposedly more continuous in the 0.0-0.1 m layer, whereas log K1 showed greater pore continuity in the 0.1-0.2 m layer. In this study, the values of N are below those reported in other studies under NT, where N varied from 1.83 to 9.97 (Ball et al, 1988;Roseberg & McCoy, 1992;Rodrigues et al, 2011).…”

Section: Resultscontrasting

confidence: 85%

“…As also observed for BD, the K a values in CR were greatest in the 0.0-0.1 m layer. These K a values are lower than those found by Cavalieri et al (2009) and by Rodrigues et al (2011) despite the differences in soil clay content between the soil in those studies and in the present paper.…”

Section: Resultscontrasting

confidence: 83%

“…Continuity indices based on single measurements and on overall relationships do not necessarily agree (Ball et al, 1988). Rodrigues et al (2011) also found different trends for pore continuity as determined by the logarithmic relationship between K a and Ɛ a (N) and the ratio K a /Ɛ a (K1). In that study, N indicated pores supposedly more continuous in the 0.0-0.1 m layer, whereas log K1 showed greater pore continuity in the 0.1-0.2 m layer.…”

Section: Resultsmentioning

confidence: 82%

“…Ball et al (1988), Blackwell et al (1990), Dörner & Horn (2006) and Groenevelt et al (1984) used the relationships between K a and Ɛ a to estimate indexes of pore continuity that characterize functional changes in the soil pore system. In Brazil, Silva et al (2009) (Ball & Robertson, 1994;Rodrigues et al, 2011). However, these studies of near surface soils ignore spatial locations when obtaining samples in the field.…”

Section: Introductionmentioning

confidence: 99%

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Aeration condition of a clayey oxisol under long-term no-tillage

Betioli

Tormena²,

Moreira

et al. 2014

Rev. Bras. Ciênc. Solo

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The hypothesis of this study was that the absence of soil tillage in long-term no-tillage (NT) systems can be detrimental to soil aeration. The objective was to assess the aeration condition of an Oxisol (Rhodic Ferrasol), very clayey texture (750 g kg-1 of clay; 200 g kg-1 of sand), after 30 years of cultivation under NT. The physical property soil air permeability (Ka) is sensitive to changes in the soil pore system. Aside from Ka, the air-filled porosity (ε a) and indices of pore continuity (K1 and N), derived from the relationship between Ka and εa, were used as indices of soil aeration. From the soil layers 0.0-0.1 and 0.1-0.2 m, 240 undisturbed samples were collected along a transect perpendicular to the crop rows, at three sampling positions: corn plant row (CR); center of the interrow (INT); and the equidistant point between CR and INT (PE). The properties Ka and εa were determined at soil matric potentials (Ψm) of -2, -4, -6, -10, -30, and -50 kPa. Soil bulk density (BD) was also determined. The results confirmed the hypothesis. In the 0.0-0.1 m layer, Ka, K1, N and Ψa were significantly greater and BD significantly lower in CR than at the other sampling positions. At a Ψm of -10 kPa, the Ka of CR was 6.9 and 8.4 times higher than in PE and INT, respectively, in the 0.0-0.1 m layer. The properties Ka, K1 and N were sensitive enough to detect changes in the pore system and their differences between the sampling positions demonstrated the importance of the spatial location for soil sampling. Tilling the crop rows provides better soil aeration under NT.

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Section: Resultscontrasting

confidence: 85%

Section: Resultscontrasting

confidence: 83%

Section: Resultsmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Aeration condition of a clayey oxisol under long-term no-tillage

Betioli

Tormena²,

Moreira

et al. 2014

Rev. Bras. Ciênc. Solo

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“…Desse modo, cerca de 56 % da variabilidade de K a foi explicada pelo modelo da regressão (Quadro 3) -resultado semelhante ao obtido por Rodrigues et al (2011). O índice de continuidade de poros N apresentou diferença não significativa (p>0,05) entre os três sistemas nas quatro primeiras camadas, e somente na camada de 0,4-0,5 m o tratamento PD-E diferiu (F = 6,5878; p = 0,01130) dos demais.…”

Section: Resultsunclassified

Qualidade física de um latossolo vermelho sob plantio direto submetido à descompactação mecânica e biológica

Silveira

Silva

Figueiredo

et al. 2012

Rev. Bras. Ciênc. Solo

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Common bean in highly variable weather conditions, on sandy soils, and food security in a subtropical environment

Reichert

Rodrigues

Awe

et al. 2015

Food and Energy Security

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Common bean is a vital component of food security and reduction in malnutrition in developing nations of the world. In a year of low rainfall and high temperature during flowering and high rainfall during grain filling, we studied the effects of (1) water availability and tillage on soil structural formation and on water retention, growth and productivity of common bean, and (2) time series analysis of soil available water and its relationship with related atmospheric variables. Soil management systems consisted of no-tillage (NT), conventional tillage (CT), chiseling 2 days before sowing (Ch 0 ), and 1 year before sowing (Ch 1 ), in complete randomized block design and four replications. Air temperature, rainfall, soil available water, and air capacity were monitored throughout the 78-days bean cycle, and time series analysis of data was performed. Water availability in topsoil reached limiting values, close to the permanent wilting point, limiting proper development of bean at flowering. Water availability was higher in periods of limited rainfall in untilled soils (NT and Ch 1 ). Low soil availability of water and high air temperatures during flowering and grain filling stages affected grain production but grain yield did not differ statistically among tillage systems, which was similar to the average yield obtained in the state of Rio Grande do Sul. Temporal distribution of soil available water did not correlate with daily rainfall but correlated with air temperature. Time series analysis was adequate for estimating soil available water from its previous and related variables. Conservation agriculture (no-tillage and old-chiseling) improves water conditions in soil, but with long periods of water deficit there is no guarantee for high food production; thus, supplementary irrigation may still be necessary to reduce the combined effects of abiotic factors of air temperature and rainfall. 220

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Permeabilidade ao ar em Latossolo Vermelho sob diferentes sistemas de manejo

Cited by 23 publications

References 24 publications

Aeration condition of a clayey oxisol under long-term no-tillage

Aeration condition of a clayey oxisol under long-term no-tillage

Qualidade física de um latossolo vermelho sob plantio direto submetido à descompactação mecânica e biológica

Common bean in highly variable weather conditions, on sandy soils, and food security in a subtropical environment

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