Influência das frações de areia na retenção e disponibilidade de água em solos das formações Caiuá e Paranavaí

Fidalski, Jonez; Tormena, Cássio Antônio; Alves, Sebastião; Auler, Pedro Antonio Martins

doi:10.1590/s0100-06832013000300007

Cited by 31 publications

(32 citation statements)

References 17 publications

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“…This great retention is explained by the high fine sand content in its A horizon (124 g kg -1 ) ( Table 1). Similar results were found by Fidalski et al (2013), who evaluated sandy soils and found higher soil water retention in horizons that had predominance of the fine sand fraction. The higher microporosity (53.03%), and total porosity (56.79%) of the A horizon (Table 3) may also explain these results, since the particle structural arrangement and pore distribution affect the available water, especially smaller diameter pores (Kiehl, 1979).…”

Section: Resultssupporting

confidence: 87%

Soil Water Retention in the Semiarid Region of Brazil

Silva¹,

Portela²,

Batista³

et al. 2018

JAS

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From the physics point of view, soil structure is a dynamic attribute that is affected by genetic conditions and anthropogenic changes and requires an integrated approach. Soil water retention curve is one of the main tools used in soil structure evaluations. The objective of this work was to evaluate the structural and chemical attributes of soils of different classes and agroecosystems in the Terra de Esperança Settlement (Governador Dix Sept Rosado, Rio Grande do Norte, Brazil) to distinguish these environments. Disturbed and undisturbed soil samples were collected in horizons of 10 soil profiles of the soil classes: Cambissolo Háplico (Haplustepts), Latossolo Vermelho-Amarelo (Eutrustox), Chernossolo Rêndzico (Calciustolls), and Neossolo Flúvico (Usticfluvents). The soil physical attributes evaluated were granulometry, soil density, total porosity, aeration porosity, macroporosity, microporosity, field capacity, permanent wilting point, available water, and water retention curve. The results were expressed in averages of four replicates per horizon (in laboratory) by multivariate analysis, which detected the most sensitive attributes for the distinction of the environments. The soil physical attributes of the different classes and its inorganic fractions, especially silt and clay, were determinant to distinguish the environments; they affected the microporosity; aeration porosity; and available water. The source material of the Chernossolo Rêndzico, which is rich in calcium and magnesium, affected its physical attributes, characterized by the predominance of the silt fraction. Clay was the determinant fraction of the Cambissolo Háplico, and Neossolo Flúvico; and the sand fraction on the surface layer, and clay fraction in the Bw horizon were determinant of the Latossolo Vermelho-Amarelo. The more expressive physical attributes were soil density, sand content, macroporosity (Latossolo Vermelho-Amarelo), microporosity, field capacity, available water, permanent wilting point, total organic carbon, mass-based moisture, volume-based moisture, clay, aeration porosity (Cambissolo Háplico, and Neossolo Flúvico), and silt (Chernossolo Rêndzico).

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Section: Resultssupporting

confidence: 87%

Soil Water Retention in the Semiarid Region of Brazil

Silva¹,

Portela²,

Batista³

et al. 2018

JAS

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“…Being sandy, this soil contributes to a more uniform structural organization, so that the difference among the curves may be linked to other factors and not only to the size of the undisturbed sample. In studying the influence of the sand fraction on water retention and water availability in soils originated from sandstone, Fidalski et al (2013) found that fine sand was responsible for the formation of smaller pores and greater retention of water when compared to another soil of more sandy texture. The soil pore distribution depends on the combination of soil texture and soil structure: the pores due to the texture (ultra and cryptomicropores) strongly retain the water in the soil by adsorption, and the secondary pores, that is, the structural ones, correspond to the spaces within the soil aggregates (Zaffar and Lu, 2015).…”

Section: Rev Bras Cienc Solo 2018;42:e0180058mentioning

confidence: 99%

Soil Water Retention Curve as Affected by Sample Height

Silva

Libardi

Gimenes

2018

Rev. Bras. Ciênc. Solo

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The soil water retention curve is one of the main instruments to assess the soil physical quality and to improve soil management. Traditionally, the equipment most used in the laboratory to determine the retention curve has been Haines funnels and Richards chambers. An important factor to which little attention has been given in the use of these equipaments is the height of the undisturbed soil sample. This work proposes to evaluate the influence of different heights of undisturbed samples for the determination of the retention curve. For this, undisturbed soil samples were collected in aluminum cylinders of three different heights (S1 = 75 mm; S2 =50mm; S3 =25 mm) and with the same internal diameter (70 mm) from the diagnostic horizons of a Typic Hapludox and a Kandiudalfic Eutrudox (Latossolo Vermelho amarelo distrófico típico and Nitossolo Vermelho eutrófico latossólico, respectively) in experimental areas of "Escola Superior de Agricultura Luiz de Queiroz" (ESALQ/USP), Piracicaba (SP), Brazil. The soil physical characterization was done based on granulometric analysis, bulk density, particle density, porosity, and organic carbon. The retention curves were determined for each sample size using Haines funnels for the tensions of 0.5, 1, 4, 6, and 10 kPa and Richards chambers for 33, 100, and 500 kPa. Data of the curves were estimated, fitted to a model and then the distribution of the soil pore radius was evaluated, differentiating the soil water retention curve. The Typic Hapludox showed a not so remarkable difference between the retention curve with the S3 samples and the retention curve with the S1 samples, in the range 0-1 kPa of tensions, and also between the retention curve with S1 samples and both retention curves with the S2 and S3 samples, in the range 100-500 kPa of tension. This led to a slight difference in the pore distribution curves for the sample heights of this soil. The Kandiudalfic Eutrudox, however, presented not only a remarkable difference of the smaller sample retention curve (S3) in relation to the larger ones (S1 and S2) in the range 0-10 kPa of tension, but also a notable difference in the pore distribution curves, with a reduction of mesopores and increase of micropores with the increase of sample height. Finally, from the results obtained and with the methodology used to determine the soil retention curve, it is not recommended to use undisturbed samples with a height greater than 25 mm.

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“…This region occupies a total area of 3.2 million hectares, representing approximately 16% of the total area of the state (SÁ; CAVIGLIONE, 1999). Medium and sandy-textured soils originated from Caiuá sandstone, with high susceptibility to erosion and low water storage capacity, are predominant in this region (FIDALSKI et al, 2013). The sand contents reach 850-900 g kg -1 , and the contents of phosphorus, potassium, calcium, magnesium and organic matter are generally critical for crop growth (COSTA et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Yield of soybean, pasture and wood in integrated crop-livestock-forest system in Northwestern Paraná state, Brazil

Franchini¹,

Balbinot²,

Sichieri³

et al. 2014

Rev. Ciênc. Agron.

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-The integrated crop-livestock-forest system can enhance the production of soybeans, meat and wood in regions characterized by sandy soils and warm climate. The aim of this study was to evaluate the yield of soybean, Urochloa ruziziensis grass and eucalyptus in an integrated system during the first four years after the establishment of eucalyptus in the northwestern region of Paraná state, Brazil. The experiment was established in October 2009, using soybean (summer) -U. ruziziensis (autumn/winter) succession between single rows of Corymbia maculata (eucalyptus species). The spacing between tree rows and eucalyptus plants in the row were 14 and 4.2 m, respectively. Adjacent plots had the same soybean-U. ruziziensis succession, but without eucalyptus. The spatial variability of soybean grain yields and grass shoot dry matter production was evaluated with and without trees, and the data was analyzed using geostatistics, with the results expressed as spatial variability maps. The tree component did not significantly affect soybean yield in the first two growing seasons. In the 3rd and 4th growing season (2011/12 and 2012/13), the interference of eucalyptus reduced the soybean grain yield by 2.9 and 27.0%, respectively, and the effect was stronger close to the tree rows. In July 2012, the tree component reduced the shoot dry matter productivity of U. ruziziensis by 29.2%. At 19 and 35 months after eucalyptus planting, the cumulative wood volume production was 0.73 and 5.17 m 3 ha -1, respectively.Key words: Eucalyptus. Glycine max L.. Urochloa ruziziensis. Sandy soil. Spatial and temporal variability.RESUMO -O sistema integração lavoura-pecuária-floresta pode viabilizar a produção de soja, carne e madeira em regiões que apresentam solos arenosos e clima quente. O objetivo desse trabalho foi avaliar a produtividade de soja, Urochloa ruziziensis e eucalipto em sistema integrado, durante os quatro primeiros anos de implantação, na região Noroeste do Paraná. O experimento foi implantado em outubro de 2009, usando a sucessão soja-U. ruziziensis nos entre renques simples de Corymbia maculata (espécie de eucalipto utilizada). Os espaçamentos entre renques e plantas foram de 14 e 4,2 m, respectivamente. Em área contígua, foi usada a mesma sucessão de culturas, mas sem o eucalipto. Os rendimentos de soja e de capim foram avaliados na ausência e presença de árvores, de forma espacializada, sendo os dados analisados por geoestatística e os resultados expressos por mapas de variabilidade espacial. O componente arbóreo não afetou a produtividade de soja nas duas primeiras safras. Na terceira e quarta safras, 2011/12 e 2012/13, a redução de produtividade ocasionada pela interferência do eucalipto foi de 2,9 e 27,0%, sendo mais intensa nas proximidades das árvores.

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Influência das frações de areia na retenção e disponibilidade de água em solos das formações Caiuá e Paranavaí

Cited by 31 publications

References 17 publications

Soil Water Retention in the Semiarid Region of Brazil

Soil Water Retention in the Semiarid Region of Brazil

Soil Water Retention Curve as Affected by Sample Height

Yield of soybean, pasture and wood in integrated crop-livestock-forest system in Northwestern Paraná state, Brazil

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