Morfologia e estabilidade de agregados superficiais de um argissolo vermelho-amarelo sob diferentes manejos de longa duração e mata atlântica secundária

Hickmann, Clério; Costa, Liovando Marciano da; Schaefer, Carlos Ernesto Gonçalves Reynaud; Fernandes, Raphael Bragança Alves

doi:10.1590/s0100-06832011000600034

Cited by 14 publications

(12 citation statements)

References 19 publications

(13 reference statements)

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“…This behavior is thus opposed to the study of Hickmann et al (2011) who reported that the no-tillage system increases aggregate stability in water since the MGD and WMD were superior in relation to the conventional tillage system. Organic matter and root development are the main agents responsible for the formation of larger aggregates (Salton et al, 2008); nevertheless, the stability of the aggregates is related to the cohesion among the soil particles.…”

Section: Resultscontrasting

confidence: 84%

Physical quality of an Oxisol after different periods of management systems

Rossetti

Centurion

Neto

2013

Rev. Bras. Ciênc. Solo

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SUMMARYManagement systems may lead to a loss of soil physical quality as a result of removal of the plant cover and excessive agricultural mechanization. The hypothesis of this study was that the soil aggregate stability, bulk density, macro-and microporosity, and the S index and saturated hydraulic conductivity may be used as indicators of the soil physical quality. The aim was to study the effects of different periods and managements on the physical attributes of a medium-textured Red Oxisol under soybean and corn for two growing seasons, and determine which layers are most susceptible to variations. A completely randomized experimental design was used with split plots (five treatments and four layers), with four replications. The treatments in 2008/09 consisted of: five years of no-tillage (NTS5), seven years of no-tillage (NTS7), nine years of no-tillage (NTS9), conventional tillage (CTS) and an adjacent area of native forest (NF). The treatments were extended for another year, RESUMO: QUALIDADE FÍSICA DE UM LATOSSOLO SOB DIFERENTES TEMPOS E MANEJOSOs sistemas de manejo podem ocasionar a perda da qualidade do solo, em decorrência da retirada da cobertura vegetal e do excessivo uso da mecanização. A hipótese desta pesquisa foi que a estabilidade de agregados, a densidade do solo, a macro e a microporosidade do solo, o índice S e a condutividade hidraúlica saturada pudessem ser utilizados como indicadores de qualidade física do solo. Diante disso, objetivaram-se estudar os efeitos dos diferentes tempos e manejos nos atributos físicos de um Latossolo Vermelho de textura média, cultivado por dois anos agrícolas, com soja e milho e determinar quais são as camadas mais susceptíveis a variações. O delineamento experimental foi inteiramente casualizado com parcelas subdivididas (cinco tratamentos e quatro camadas), com quatro repetições. Os tratamentos em 2008/09 foram: plantio direto por cinco anos (NTS5), plantio direto por sete anos (NTS7), plantio direto por nove anos (NTS9), preparo convencional (

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Section: Resultscontrasting

confidence: 84%

Physical quality of an Oxisol after different periods of management systems

Rossetti

Centurion

Neto

2013

Rev. Bras. Ciênc. Solo

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“…There was no significant reduction in soil aggregation with the introduction of the 6 year no-tillage system in areas of native Cerrado, as shown in Figure 1. This result agrees with specialized literature (Assis & Lanças, 2010;Franchini et al, 2012), which emphasizes the positive effect of no-tillage over soil aggregation indexes due to the lack of mechanical destruction of aggregates by implements and to the protection that straw cover offers to the soil surface (Morais & Cogo, 2001), favoring a better distribution and morphology of the aggregates at surface level, showing that this management system is similar to the original structuring conditions (Hickmann et al, 2011).…”

Section: Resultssupporting

confidence: 90%

Soil use and management systems, time since adoption, and their impacts over aggregation

Silva

Santos

Nóbrega

et al. 2018

Agraria

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The Cerrado biome is of notable territorial relevance in the state of Piaui, Brazil. This region is an area of reference for food production. The aim of this work was to evaluate the stability of soil aggregates in water, in function of different soil use and management systems, as well as of the time since adopting these systems in Cerrado areas in the southwest region of Piaui. In this study, nine soil use and management systems were evaluated, arranged in the following manner: no-tillage system of three and six years of use, pasture of two and six years, eucalypt of six and twelve years, conventional tillage of two and eight years, and native Cerrado (Savana). The analyzed variables were: organic carbon, mean geometric diameter, mean weight diameter, aggregate stability index and aggregate diameter classes. Aggregation in Ferralsol is favored by clay and organic carbon contents. The longer adoption time in the no-till, pasture and eucalypt systems favored soil aggregation, while in conventional tillage there was a reduction of the aggregates.

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“…A crotalária, o feijão-de-porco e o milheto favoreceram, quando semeados no espaçamento de 0,25 m, o aumento da estabilidade dos agregados do solo em água (Tabela 4). Os valores encontrados nesse estudo são superiores aos encontrados por Portugal et al (2010), Oliveira et al (2010) e Hickmann et al(2011, em Argissolos sob diferentes usos. Desta forma, quando as plantas de cobertura são cultivadas no espaçamento de 0,25 m propiciam maior agregação do solo, o que resulta em também maior resistência à erosão hídrica.…”

Section: Não Verificaram Diferenças Nos Atributos Químicos Do Solo Eunclassified

Espécies de plantas de cobertura no recondicionamento químico e físico do solo

Cardoso

Silva

Carvalho

et al. 2013

Agraria

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RESUMOO cultivo das plantas de cobertura pode proporcionar melhorias e reestruturação de atributos químicos e físicos do solo, reduzir a resistência do solo à penetração e aumentar a permeabilidade do solo à água reduzindo, assim, a erosão hídrica, razão pela qual se objetivou com este trabalho, avaliar o potencial de espécies de plantas de cobertura no recondicionamento dos atributos químicos e físicos do solo. O experimento foi instalado no município de Lavras, região Sul do Estado de Minas Gerais, sendo as espécies de plantas de cobertura cultivadas sobre um Argissolo Vermelho Amarelo distrófico. Os tratamentos instalados foram: Crotalaria juncea L. (crotalária), Canavalia ensiformis DC. (feijão-de-porco) e Pennisetum sp Rich (milheto), cultivadas nos espaçamentos de 0,25 e 0,50 m entre linhas. Os atributos químicos e físicos analisados foram: pH em água, macronutrientes, matéria orgânica do solo, densidade do solo, volume total de poros, microporosidade, macroporosidade, condutividade hidráulica do solo saturado, umidade e temperatura do solo, estabilidade de agregados e resistência do solo à penetração. As plantas de cobertura influenciaram a disponibilidade de potássio e fósforo porém os demais atributos químicos não foram modificados. A densidade do solo, volume total de poros, micro e macroporosidade não foram alterados após o cultivo das plantas de cobertura, independente dos espaçamentos utilizados. As plantas de cobertura reduziram a resistência do solo à penetração para valores não restritivos ao crescimento das raízes, até a profundidade de 0,25 m. Palavras-chave: Argissolo Vermelho Amarelo, Fabaceae, Poaceae Potential of cover plant species in reconditioning of physical and chemical properties of soil ABSTRACTSoil cover crops may provide improvement and restructuring of chemical and physical soil properties, reduce the soil resistance to penetration and increase soil permeability, thus reducing water erosion. Therefore, this work aimed to evaluate the potential of cover crops in the reconditioning the chemical and physical properties of soil. The experiment was conducted in Lavras in the region south of Minas Gerais State, and the cover crops were planted on a distrophic Hapludult. The treatments consisted of Crotalaria juncea L. (sunn hemp), Canavalia ensiformis DC. (jack-bean) and Pennisetum sp Rich (pearl millet), grown in between-rows with spacings of 0.25 and 0.50 m. The chemical and physical properties analysed were pH, macronutrients, soil organic matter, bulk density, total porosity, microporosity, macroporosity, saturated hydraulic conductivity, soil temperature and moisture, aggregate stability and soil penetration resistance. There was influence of cover crops on the potassium and phosphorus availability in soil, but other chemical properties were not modified. The bulk density, total porosity, micro and macroporosity were not changed after cultivation of cover crops, regardless of row length used. The cover crops reduced the soil penetration resistance values for nonrestrictive to root ...

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Morfologia e estabilidade de agregados superficiais de um argissolo vermelho-amarelo sob diferentes manejos de longa duração e mata atlântica secundária

Cited by 14 publications

References 19 publications

Physical quality of an Oxisol after different periods of management systems

Physical quality of an Oxisol after different periods of management systems

Soil use and management systems, time since adoption, and their impacts over aggregation

Espécies de plantas de cobertura no recondicionamento químico e físico do solo

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