Resistência à penetração e agregação de um Latossolo Amarelo sob monocultivo de soja e de eucalipto no cerrado do Piauí

Ibiapina, Thiago Vinícius Barros; Salviano, Adeodato Ari Cavalcante; Nunes, Luís Alfredo Pinheiro Leal; Mousinho, Francisco Edinaldo Pinto; Lima, Milciades Gadelha de; Soares, Laércio Moura dos Santos

doi:10.15361/1984-5529.2014v42n4p411-418

Cited by 12 publications

(22 citation statements)

References 10 publications

(12 reference statements)

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“…Here, the soybean system showed the lowest values for both WMD and ASI in the evaluated soil layers. Previous studies in the savanna areas of Piauí state showed that WMD and ASI were lower in all the conventional cropping system soils than in native forest soils; this was due to intense soil disturbance and heavy plowing and harrowing carried out for creating favorable conditions for soybean monocultures (Fontenele et al, 2009;Ibiapina et al, 2014). Castro Filho et al (1998) studied aggregate stability and confirmed that the continuous disturbance of soil through the use of plows promotes the rupture of aggregates, thereby impairing aggregate stability and decreasing WMD in the subsequent crops adopting this system.…”

Section: Resultsmentioning

confidence: 96%

“…The agricultural exploitation of these areas with soybean cultivars is based on management systems with intense soil disturbances due to plowing and harrowing, thus modifying the soil's original characteristics (Barbosa et al, 2016). Prolonged conventional management systems leave the latosols exposed and cause the disintegration of macroaggregates, resulting in rapid decomposition of organic matter (Ibiapina et al, 2014). This influences soil density -Sd (Pragana et al, 2012) and penetration resistance -PR (Drescher et al, 2012), which affect the distribution of aggregates into size classes and/or their stability in water (Castro Filho et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

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Physical attributes of yellow oxisol under different monocultures in the savanna of Piauí state, Brazil

Pessoa

Nunes

Sousa

et al. 2018

Agraria

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The objective of this study was to evaluate the physical attributes of an oxisol under soybean monoculture, eucalyptus monoculture, and pasture and native forest conditions at depths of 0-0.20 and 0.20-0.40 m. Disturbed and undisturbed soil samples were collected to perform physical analyses. Specific analyses included texture, soil density, macroporosity, microporosity, total porosity, aggregate stability index, weighted mean diameter, percentage of aggregates with a diameter of >2.00 mm, and soil penetration resistance (PR). The data were analyzed using the Tukey's test for the comparison of mean values and multivariate analysis. Different uses and management of the soil affected its physical attributes, resulting in the deterioration of soil quality in the soybean and pasture areas. Soil management systems in pasture and soybean areas also resulted in higher soil density and lower soil porosity. The eucalyptus monoculture showed soil aggregation equal to that of the native forest. There was a sharp increase in soil PR beyond the 0.15-m deep layer in the pasture and soybean management systems. Multivariate analysis identified variables that correlated with each type of soil management and the effects of changes in soil characteristics.

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Section: Resultsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Physical attributes of yellow oxisol under different monocultures in the savanna of Piauí state, Brazil

Pessoa

Nunes

Sousa

et al. 2018

Agraria

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“…Na Tabela 3, são apresentados os resultados estatísticos referentes à RMP, em que é possível verificar o mesmo comportamento observado com a densidade aparente do solo. Em áreas manejadas com sistemas silvipastoris, este mesmo comportamento foi encontrado por Lima et al (2013) e Lima et al (2014, enquanto em áreas sob floresta nativa, diversos autores observaram aumento significativo na RMP, com o aumento da profundidade a partir dos 20 cm (Dalben & Osaki, 2008;Ibiapina et al, 2014 Para porosidade total, macro e microporosidade (Tabela 4), é possível verificar que a Pt não demonstrou diferença significativa entre os locais avaliados, porém a profundidade 0-20 cm apresentou maior Pt em ambos os locais, em relação às demais profundidades. Tabela 2.…”

Section: Resultsunclassified

Qualidade Física do Solo Sob Manejo Silvipastoril e Floresta Secundária

et al. 2017

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RESUMOObjetivou-se analisar a qualidade física em uma área de floresta em regeneração (FS) há 20 anos quando comparada à área que, neste período, permaneceu sendo manejada com sistema silvipastoril, com espécies arbóreas nativas em espaçamento aleatório (SSP). Foram realizadas coletas até 60 cm de profundidade para obtenção das curvas de retenção de água no solo, a densidade, a porosidade total, a macro e a microporosidade, a resistência mecânica à penetração (RMP) e sua respectiva umidade do solo, no momento da coleta. Houve similaridade entre os sistemas de manejo para as variáveis: densidade do solo, resistência mecânica à penetração e porosidade total. A microporosidade foi maior na FS em relação ao SSP, fazendo com que o sistema silvipastoril apresentasse menor capacidade de armazenamento de água. O isolamento do sistema silvipastoril no período de 20 anos apresentou capacidade de alterar o armazenamento de água no solo devido à modificação na porosidade, tornando-a similar à floresta natural.Palavras-chave: distribuição de poros, qualidade do solo, sistemas silvipastoris. Soil Physical Quality Under Silvopastoral Management and Secondary Forest ABSTRACTThis study aimed to analyze the soil physical quality in a 20-year regenerating forest area (FS) in relation to an area under silvopastoral management during the same period with randomly spaced (SSP) native tree species. Samples were collected up to 60 cm deep to obtain soil water retention curves, density, total porosity, macroporosity, microporosity, mechanical penetration resistance (MPR) and the respective soil moisture at the time of collection. Soil density, mechanical resistance to penetration and total porosity were similar between the management systems. Microporosity was higher in FS than in SSP, leading to lower water storage capacity in the silvopastural system. The 20-year isolation of the silvopastoral system proved to be able to affect the soil water storage capacity due to changes in porosity, making its soils to reach similar values to natural forest.

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“…Thus, organic matter, which was once physically protected, is exposed to the attack of soil microorganisms, reducing soil OC content (IBIAPINA et al, 2014;RAMOS et al, 2011). There is temporary stimulus of microbiota after soil disturbance due to better aeration conditions, higher temperatures and more alteration between soil wetting and drying, accelerating organic matter decomposition, as also observed by Marchiori Junior and Melo (2000).…”

Section: Resultsmentioning

confidence: 99%

Chemical and microbiological indicators of quality in a yellow oxissol under conventional tillage of different ages

Barbosa¹,

Araújo²,

Silva³

et al. 2017

Biosci. J.

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Resistência à penetração e agregação de um Latossolo Amarelo sob monocultivo de soja e de eucalipto no cerrado do Piauí

Cited by 12 publications

References 10 publications

Physical attributes of yellow oxisol under different monocultures in the savanna of Piauí state, Brazil

Physical attributes of yellow oxisol under different monocultures in the savanna of Piauí state, Brazil

Qualidade Física do Solo Sob Manejo Silvipastoril e Floresta Secundária

Chemical and microbiological indicators of quality in a yellow oxissol under conventional tillage of different ages

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