Correção Da Acidez Do Solo E Desenvolvimento Do Sistema Radicular Do Amendoim Em Função Da Calagem

Caires, Eduardo Fávero; Rosolem, Ciro Antônio

doi:10.1590/s0006-87051998000100020

Cited by 12 publications

(6 citation statements)

References 10 publications

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“…These low pH values can be explained by the acidification induced by the application of the fertilizers to the soil (Graham and Haynes 2005;Lange et al, 2006). In depth, the pH results corroborate with Caires and Rosolem (1998) who used 4 mg ha -1 of limestone and observed an increase in pH values in the arable layer (0.00-0.20 m) and in the 0.20-0.40 m layer. This high acidity of the soil occurs parallel to the high levels of Al, very common in the Plinthsols of the region (Anjos et al, 2007).…”

Section: Discussionsupporting

confidence: 84%

Soil Chemical Attributes under Crop-Livestock-Forest Integration System and in Different Land Uses in Mata dos Cocais Region

Reis¹,

Signor²,

Muniz³

et al. 2018

JAS

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The sustainability of ecosystems is closely linked with the assessment of soil properties that estimate their quality. This work proposes to evaluate soil chemical attributes as a function of the implantation of a crop-livestock-forest integration system (ICLF) in the region of Mata dos Cocais in the state of Maranhão, Northeast Brazil. The four different land uses evaluated were native vegetation with babassu, capoeira vegetation, degraded pasture and area under ICLF system (with marandu grass, maize and eucalyptus consortium). The samples were collected up to one meter deep, comprising seven layers: 0.00-0.10, 0.10-0.20, 0.20-0.30, 0.30-0.40, 0.40-0.60, 0.60-0.80 and 0.80-1.0 m. The chemical attributes evaluated were pH, Ca, Mg, Al, P, K and Na, potential acidity, base sum, base saturation and soil cation exchange capacity (CEC). The levels of P, in the 0.00-0.10 m layer, were higher in the ICLF system than those of the native forest with babassu. The levels of K in the ICLF system and degraded pasture were higher than the other land uses up to a depth of 0.40 m, ranging from 0.92 cmolc dm-3 to 0.62 cmolc dm-3 and 1.04 cmolc dm-3 and 0.67 cmolc dm-3, respectively. Base saturation was higher in soils under ICLF system and degraded pasture than those observed in native forest and capoeira vegetation. There was an effect in chemical attributes of the soil such as a function of land use and, in general, the highest values were found in areas with degraded pasture and ICLF.

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Section: Discussionsupporting

confidence: 84%

Soil Chemical Attributes under Crop-Livestock-Forest Integration System and in Different Land Uses in Mata dos Cocais Region

Reis¹,

Signor²,

Muniz³

et al. 2018

JAS

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“…The surface liming resulted in the most elevated of the pH values in the deepest soil layer sampled, when compared with the other methods of application. Similar results were found in studies by Alleoni, Cambri and Caires (2005); Caires and Rosolem (1998), which demonstrated increases in the pH and in the concentration of exchangeable Ca and Mg below the region of liming. It highlights that the operation of plowing and harrowing affects the soil to a maximum depth of 25-30 cm and, probably cause disturbance in this layer of the soil.…”

Section: Soil Attributessupporting

confidence: 89%

Application limestone forms and doses for alfalfa in no-tillage system

Toffolli¹,

Assmann²,

Assmann³

et al. 2014

Rev. Ciênc. Agron.

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-Alfalfa (Medicago sativa L.) requires good soil fertility. Brazil is characterized by acidic soils which reduce the potential of the crop. Generally, liming is incorporated into the soil, but in tillage systems it is inadvisable. This study aimed to evaluate the effects of the lime application method and dose on pH, Al +3 , V % and Ca+Mg in the soil and on dry matter yield of alfalfa cultivated under a consolidated no-tillage system. The experiment was conducted at the Experimental Station of Paraná Agronomic Institute, located in Pato Branco city, in Paraná state. The plots consisted of the types of lime application (plowing+harrowing, subsoil and surface), the sub-plots was the lime dose (0, 2, 4, 6 and 8 Mg ha -1 ) and the sub-sub-plots were the sampled soil depth (0-5; 5-10; 10-20 and 20-30 cm). The results show the application of lime, even superficially, caused increases in pH, concentration of Ca and Mg and base saturation of the soil, while also reducing the concentration of Al, especially in the surface layers of the soil. The practice of plowing and harrowing or of subsoiling, with the aim of lime incorporation in a consolidated no-tillage system is unnecessary. If it is required, the application of lime to the soil should be done superficially for alfalfa cultivated in this system. Key words: Acidity and liming. Liming superficial application. Liming recommendation. Bases saturation.RESUMO -A alfafa (Medicago sativa L.) é uma das plantas mais exigentes em nutrientes e em fertilidade do solo. Por sua vez, o Brasil possui solos ácidos que podem reduzir o potencial produtivo das culturas. Recomenda-se que o calcário seja incorporado ao solo, contudo em sistemas de plantio direto isto é desaconselhado. Este trabalho tem por objetivo avaliar doses e formas de aplicação de calcário para alfafa cultivada em sistema plantio direto consolidado. O experimento foi conduzido na Estação Experimental do Instituto Agronômico do Paraná, localizada no Município de Pato Branco -PR. As parcelas constituíram-se das formas de aplicação de calcário (superficial, subsolador, aração+gradagem), as sub-parcelas pelas doses de calcário (0; 2; 4; 6 e 8 Mg ha -1

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“…Na camada mais superficial, praticamente não houve elevação do pH. Embora Caires et al (1998) tenham notado pouca movimentação do calcário no perfil do solo, com efeito no pH mais acentuado nas camadas superficiais, Caires & Rosolem (1998) observaram correção no perfil de um Latossolo Vermelho-Escuro de textura média, pelo menos até 60 cm de profundidade. Assim, o efeito do calcário em profundidade parece depender do solo em questão.…”

Section: Resultsunclassified

“…Porém, como os materiais corretivos utilizados são pouco solúveis e os produtos da reação do calcário têm mobilidade limitada, a ação da calagem normalmente fica restrita às camadas superficiais do solo (Ritchey et al, 1982;Caires et al, 1998).…”

Section: Introductionunclassified

Dinâmica do nitrogênio no solo em razão da calagem e adubação nitrogenada, com palha na superfície

Rosolem

Foloni

Oliveira

2003

Pesq. agropec. bras.

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Resumo -Em sistemas com semeadura direta, a calagem tem sido aplicada superficialmente, causando excesso de calcário nos primeiros centímetros do perfil do solo, onde também é aplicado o N em cobertura e a densidade de comprimento radicular é alta. O objetivo deste trabalho foi estudar a dinâ-mica do N e do pH do solo em razão da calagem em superfície e aplicação de N em cobertura, na presença de palha. Plantas de algodão (Gossypium hirsutum) foram cultivadas, por 60 dias, em vasos que receberam calagem superficial ou incorporada e aplicação de doses equivalentes a 0, 50, 100 e 150 kg ha -1 de N em cobertura, na forma de sulfato de amônio; os vasos apresentavam, na superfície, o equivalente a 4 t ha -1 de palha de milheto. A calagem aumentou a mineralização e a nitrificação do N no solo, independentemente do modo de aplicação de calcário, aumentando a sua disponibilidade à planta e também a possibilidade de lixiviação. A absorção de N pela planta, além de sua imobilização pela massa microbiana do solo, neutralizou o efeito do adubo nitrogenado amoniacal no pH do solo. O algodoeiro respondeu melhor à calagem incorporada do que à superficial, mas esta resposta não foi causada por diferenças na disponibilidade de nitrogênio.Termos para indexação: Gossypium hirsutum, mineralização, nitrificação, pH do solo, plantio direto. Nitrogen dynamics in soil as affected by liming and nitrogen fertilization, with straw on the soil surfaceAbstract -In no till systems liming has been applied to soil surface, causing an excess of lime in the first centimeters of the soil profile, in which N is also applied and root length density is high. The objective of this work was to study N and pH dynamics in the soil profile as affected by liming and N fertilizer broadcast over the straw. Cotton plants (Gossypium hirsutum) were grown for 60 days in pots that received lime incorporated or applied to soil surface. The N was broadcasted at rates of 0, 50, 100 and 150 kg ha -1 , as ammonium sulfate. Pearl millet straw was added to soil surface at a rate of 4 ton ha -1 . Liming increased N mineralization and nitrification in soil irrespective of lime application method, increasing N availability to cotton and the probability of N leaching. The N uptake by the plants and its immobilization in the microbial mass in the soil neutralized the effect of ammonium nitrogen on soil pH. Cotton responded better when lime was incorporated but this response was not caused by differences in N availability.

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Correção Da Acidez Do Solo E Desenvolvimento Do Sistema Radicular Do Amendoim Em Função Da Calagem

Cited by 12 publications

References 10 publications

Soil Chemical Attributes under Crop-Livestock-Forest Integration System and in Different Land Uses in Mata dos Cocais Region

Soil Chemical Attributes under Crop-Livestock-Forest Integration System and in Different Land Uses in Mata dos Cocais Region

Application limestone forms and doses for alfalfa in no-tillage system

Dinâmica do nitrogênio no solo em razão da calagem e adubação nitrogenada, com palha na superfície

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