Tillage effect on macroporosity and herbicide transport in percolate

Malone, Robert W.; Logsdon, S. D.; Shipitalo, M. J.; Weatherington-Rice, Julie; Ahuja, Lajpat R.; Ma, Liwang

doi:10.1016/s0016-7061(03)00101-0

Cited by 62 publications

(53 citation statements)

References 52 publications

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“…Similar results were found by Seganfredo (1998), showing that pig slurry application increased macroporosity and reduced soil density. Malone et al (2003) reported that the presence of macropores increased water flux through the soil profile, with a consequent increased potential for leaching herbicides into deeper layers (Correia et Table 3. Physical properties of an Hapludox after 12 years of pig slurry applications that showed differences among application rates…”

Section: Soil Physical Propertiesmentioning

confidence: 99%

Effects of pig slurry application on soil physical and chemical properties and glyphosate mobility

Oliveira

Pinheiro

Veiga³

2014

Rev. Bras. Ciênc. Solo

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SUMMARYPig slurry applied to soil at different rates may affect soil properties and the mobility of chemical compounds within the soil. The purpose of this study was to evaluate the effects of rates of pig slurry application in agricultural areas on soil physical and chemical properties and on the mobility of glyphosate through the soil profile. The study was carried out in the 12 th year of an experiment with pig slurry applied at rates of 0 (control), 50, 100 and 200 m 3 ha -1 yr -1 on a Latossolo Vermelho distrófico (Hapludox) soil. In the control, the quantities of P and K removed by harvested grains were replaced in the next crop cycle. Soil physical properties (bulk density, porosity, texture, and saturated hydraulic conductivity) and chemical properties (organic matter, pH, extractable P, and exchangeable K) were measured. Soil solution samples were collected at depths of 20, 40 and 80 cm using suction lysimeters, and glyphosate concentrations were measured over a 60-day period after slurry application. Soil physical and chemical properties were little affected by the pig slurry applications, but soil pH was reduced and P levels increased in the surface layers. In turn, K levels were increased in sub-surface layers. Glyphosate concentrations tended to decrease over time but were not affected by pig slurry application. The concentrations of glyphosate found in different depths show that the pratice of this application in agricultural soils has the potential for contamination of groundwater, especially when the water table is the surface and heavy rains occur immediately after application.Index terms: soil fertilization, physical and chemical properties, pollutant transport, pesticide.(1) Received for publication on April 24, 2013 and approved on June 9, 2014. RESUMO: EFEITOS DE DOSES DE DEJETOS LÍQUIDOS DE SUÍNOS SOBRE OS ATRIBUTOS FÍSICOS E QUÍMICOS DO SOLO E SOBRE A MOBILIDADE DO GLIFOSATOOs dejetos líquidos de suínos são aplicados no solo, como fertilizantes, em diferentes doses. Isso pode interferir nos atributos do solo e na mobilidade de espécies químicas. Este trabalho teve por objetivo avaliar a influência das doses de dejeto líquido de suínos aplicadas em áreas agrícolas sobre os atributos químicos e físicos do solo e sobre a mobilidade de glifosato no perfil do solo. O trabalho foi realizado no 12º ano de condução de um experimento, com aplicação de dejeto líquido de suínos em Latossolo Vermelho distrófico, com doses anuais de 0, 50, 100 e 200 m 3 ha -1 ano -1 . Na testemunha (dose 0), houve reposição das quantidades de P e K exportados pelos grãos das culturas. Em cada parcela, foi realizada a determinação dos atributos físicos (densidade, porosidade, textura, condutividade hidráulica do solo saturado) e químicos (teor de matéria orgânica, pH, P extraível e K trocável) do solo. Amostras de solução do solo foram coletadas em seu perfil com o uso de lisímetros de sucção, sendo determinadas as concentrações de glifosato durante 60 dias. Os atributos físicos e químicos do solo foram pouco influenci...

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Section: Soil Physical Propertiesmentioning

confidence: 99%

Effects of pig slurry application on soil physical and chemical properties and glyphosate mobility

Oliveira

Pinheiro

Veiga³

2014

Rev. Bras. Ciênc. Solo

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“…The tension disc infiltrometer is a valuable tool to investigate the water movement through macropores and the soil matrix near saturation (Watson & Luxmoore, 1986;Logsdon & Jaynes 1993;Moret & Arrúe, 2007), and to study the effects of soil tillage practices on the soil surface hydraulic properties (Malone et al, 2003;Moret & Arrúe, 2007). This device allows the estimation of K from saturation to a very low suction head (Angulo-Jaramillo et al, 2000) and quantifies the role of macropores during infiltration (Bodhinayake et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Contribution of macroporosity to water flux of a soil under different tillage systems

Soracco

Lozano

Balbuena

et al. 2012

Rev. Bras. Ciênc. Solo

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SUMMARYIn view of the importance of the macroporosity for the water transport properties of soils, its quantitative assessment is a challenging task. Measurements of hydraulic conductivity (K) at different soil water tensions and the quantification of water-conducting macropores ( M ) of a soil under different tillage systems could help understand the effects on the soil porous system and related hydraulic properties. The purpose of this study was to assess the effects of Conventional Tillage (CT), Chisel Plow (CP) and No Tillage (NT) on M and on K; and to quantify the contribution of macroporosity to total water flux in a loam soil. A tension disc infiltrometer was used at two soil water pressure heads (-5 cm, and 0) to infer M and K, during fallow. Macroporosity was determined based on the flow contribution between 0 and -5 cm water potentials (K 0 , K 5 , respectively), according to the HagenPoiseuille equation. The K 0 values were statistically higher for CT than for NT and CP. The K 5 values did not differ statistically among treatments. The mean K values varied between 0.20 and 3.70 cm/h. For CT, M was significantly greater than for CP a nd N T, follo wi ng t he s am e trend as K 0 . No differences in M were detected between CP and NT. With CT, the formation of water-conducting macropores with persi stenc e unti l p ost -ha rv est wa s p oss ible, while under C P p rep ara tio n, the w aterconducting macropores were not persistent. These results support the idea that tillage affects the soil water movement mainly by the resulting water-conducting macropores. Future studies on tillage effects on water movement should focus on macroporosity.Index terms: Tension disc infiltrometer, no tillage, chisel plow, conventional tillage, effective porosity.(

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“…Autores têm sugerido que práticas de manejo conservacionistas como o PD promovem a melhoria na estrutura do solo na formação de agregados. A formação de agregados maiores está diretamente ligada à existência de macroporos, aumentando o potencial de permeabilidade e, conseqüentemente, o fluxo de água e herbicida para camadas mais profundas (Malone et al, 2003). Por sua vez, a melhoria na estrutura do solo decorre do efeito da matéria orgânica na formação desses agregados que, por sua vez, pode aumentar a retenção e diminuir a lixiviação do herbicida.…”

Section: Resultsunclassified

Infiltração de atrazina em latossolo submetido aos sistemas de plantio direto e convencional

Correia

Mercante

Fabricio

et al. 2007

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi comparar a lixiviação e o potencial de contaminação de lençóis de água com atrazina, em solos sob manejo de plantio direto (PD) e convencional (PC Infiltration of atrazine in an Oxisol under no-tillage and conventional tillageAbstract -The aim of this work was to compare leaching and potential groundwater contamination in soil under no-tillage and conventional tillage. This experiment was carried out in field conditions and soil columns, using an Oxisol under no-tillage (NT) and conventional tillage (CT) systems in Dourados, MS, Brazil. The determination of the hydraulic conductivity and matrix flux potential, with the use of a Guelph permeameter in the NT, showed a continue flow of water into the soil. Greater conductivity found in the surface soil, associated with the negative matrix flux potential, showed the discontinued hydraulic conductivity, when comparing subsurface layers, in the CT in relation to NT. However, NT resulted in less vertical displacement of atrazine than CT. The largest atrazine losses by leaching occurred more intensely after the first rainfall that followed the product application. Greater atrazine concentrations were retained in NT soil than in CT soil. This resulted in low levels of leaching from the NT soil, which indicates that no-tillage technology can reduce the environmental impact of pesticides.

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Tillage effect on macroporosity and herbicide transport in percolate

Cited by 62 publications

References 52 publications

Effects of pig slurry application on soil physical and chemical properties and glyphosate mobility

Effects of pig slurry application on soil physical and chemical properties and glyphosate mobility

Contribution of macroporosity to water flux of a soil under different tillage systems

Infiltração de atrazina em latossolo submetido aos sistemas de plantio direto e convencional

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