2012
DOI: 10.1590/s1806-66902012000400001
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Abstract: ; seis tratamentos de correção: 1) controle, sem correção; 2) calcário; 3) silicato de cálcio; 4) gesso; 5) calcário + gesso; 6) silicato de cálcio + gesso; além de dois sistemas de cultivo: com e sem cultivo prévio do capim-Marandu. As unidades experimentais foram compostas por vasos de tubos de PVC de 20 cm de diâmetro, compostos por dois anéis: o anel inferior, de 40 cm de altura, recebeu o solo sob condições naturais e densidade de 1,0 Mg m ; six conditioning treatments: 1) a control with no conditioning, … Show more

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Cited by 7 publications
(6 citation statements)
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References 12 publications
(15 reference statements)
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“…In addition, another fact that must be considered is the occurrence of less tortuosity and larger diameter of the micropores (when compared to the values of higher density), promoting the increase in diffusive flow of P and K, as reported by Silva et al (2008) and Costa et al (2009), as well as the lowest resistance to penetration of roots, resulting in greater absorption of these and other nutrients. For higher values of soil density, restriction to the growth of plant roots, associated with lower mineralization of soil organic matter, resulted in less absorption of N, P and K, corroborating the results obtained by Souza et al (2012), who found a reduction in the absorption of N, P and K in soybeans, as density of the soil was increased. According to Novais & Smyth (1999), compactation reduces soil aeration and mineralization of organic matter, increases the energy of water retention in the soil by increasing its viscosity, and the interaction of phosphate and potassium ions with the surface of colloids over its diffusion path, causing them to have to move closer and closer to positively charged surfaces, which hinders the absorption of these elements at the highest levels of compactation.…”
Section: Resultssupporting
confidence: 88%
See 1 more Smart Citation
“…In addition, another fact that must be considered is the occurrence of less tortuosity and larger diameter of the micropores (when compared to the values of higher density), promoting the increase in diffusive flow of P and K, as reported by Silva et al (2008) and Costa et al (2009), as well as the lowest resistance to penetration of roots, resulting in greater absorption of these and other nutrients. For higher values of soil density, restriction to the growth of plant roots, associated with lower mineralization of soil organic matter, resulted in less absorption of N, P and K, corroborating the results obtained by Souza et al (2012), who found a reduction in the absorption of N, P and K in soybeans, as density of the soil was increased. According to Novais & Smyth (1999), compactation reduces soil aeration and mineralization of organic matter, increases the energy of water retention in the soil by increasing its viscosity, and the interaction of phosphate and potassium ions with the surface of colloids over its diffusion path, causing them to have to move closer and closer to positively charged surfaces, which hinders the absorption of these elements at the highest levels of compactation.…”
Section: Resultssupporting
confidence: 88%
“…However, excessively porous soils are also detrimental to the absorption of water and nutrients by the roots since there is less contact between soil and roots, resulting in lower development of plants (Hakansson et al, 1998) According to Souza et al (2012), for soybeans grown in a dystrophic red Latosol under different compactation levels (densities of 1.00; 1.20; 1.40 and 1.60 Mg m -3 ), the increase in soil density caused a linear reduction in the contents of nitrogen, phosphorus and potassium in the shoots. According to the authors, the increase in soil density from 1.00 Mg m -3 to 1.60 Mg m -3 resulted in the reduction of 26, 82 and 61% of the total of these elements accumulated by the plants, respectively.…”
Section: Introductionmentioning
confidence: 99%
“…DRESCHER et al (2011), avaliando efeito do disco duplo e da haste sulcadora, verificaram que esse último é eficiente em aumentar a macroporosidade e diminuir a microporosidade e a densidade do solo, o que pode explicar os resultados encontrados. Em trabalho realizado por SOUZA et al (2012), o aumento da compactação do solo reduziu o acúmulo de N, P, K, Ca, Mg e de S das plantas de soja. Com o aumento da compactação, ocorre aumento da resistência mecânica ao crescimento das raízes, limitação da aeração e da disponibilidade de água e nutrientes (GOEDERT et al, 2002 Na safra 2013/14, os teores de macronutrientes das plantas no estádio R2 são adequados para o desenvolvimento das plantas de soja (CQFSRS/SC, 2004).…”
Section: Resultsunclassified
“…Soil compaction is one of the most severe degradation processes that occurs in the soil and have been affecting about 68 million hectares around the world from the vehicular traffic (Nawaz et al, 2013). Its effect on the soil structure results in higher soil density (Souza et al, 2012) and lower soil porosity (Singh and Hadda, 2014). The availability of nutrients for plants is reduced in compacted soils (Barzegar et al, 2016), such as phosphorus (Novais et al, 2007).…”
Section: Introductionmentioning
confidence: 99%