Potencial De Lixiviação De Herbicidas Em Solos Agrícolas Na Região Do Alto Paranaíba (Mg)

Andrade, André Santana; Reis, Marcelo Rodrigues dos; Drumond, Luís César Dias; Caixeta, Samuel Petraccone; Ronchi, Cláudio Pagotto

doi:10.5380/pes.v21i0.25848

Cited by 8 publications

(6 citation statements)

References 4 publications

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“…As can be seen in Figure 1, there was no detection of atrazine in leachate solution, regardless of the addition of mineral oil, which is a result consistent with the estimate made by Andrade et al (2011). Based on climatic conditions of Rio Paranaíba, MG, and in information obtained in previous research, the authors estimated 1.02 x 10 3 % losses of atrazine by leaching in a clay texture Oxisol with 80 cm depth.…”

supporting

confidence: 86%

Transport of Atrazine Via Leaching in Agricultural Soil with Mineral Oil Addition

et al. 2019

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Adjuvants, such as mineral oils, are widely used in the application of herbicides by reducing the drift and evaporation of the droplets and by increasing herbicide uptake by the plant. However, little is known about how mineral oil behaves when in contact with the soil. Thus, the objective of this research was to evaluate the transport of atrazine via leaching with the addition of mineral oil in a soil agricultural under laboratory conditions. To quantify the concentration of the herbicide along the profile of the very clay soil column (30 cm), 14C-atrazine (ring-U-14C) was used with 16,667 Bq of radioactivity per column in volume of 200 mL solution and 0 (control), 1, and 2% mineral oil (v/v) was added in the application volume. Atrazine was applied at the highest commercial dose recommended for sugarcane (4 kg ha-1). After simulation of a precipitation of 200 mm for 48 h, each column was sectioned into six parts of 5 cm and the analytes of each soil sample and the leachate were quantified by liquid scintillation spectrometry. The atrazine remained in the superficial layer of the soil, between 0 and 10 cm of depth, independent of the addition of mineral oil. No atrazine residues were detected in the leachate solution (> 30 cm) in any evaluated treatment. The addition of mineral oil at the time of application of pre-emergence atrazine did not interfere with the transport of this herbicide in the soil profile agricultural via leaching; therefore, the adjuvant may have positive effect only in the herbicide-plant relationship.

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confidence: 86%

Transport of Atrazine Via Leaching in Agricultural Soil with Mineral Oil Addition

et al. 2019

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“…Considerando a solubilidade e o caráter ácido desse herbicida, esse fato pode ter aumentado a sua lixiviação em camadas mais profundas. Alguns autores afirmam que o fomesafen apresenta capacidade de contaminação do lençol freático por ter potencial de lixiviação (Gustafson, 1989;Inoue et al, 2003;Andrade et al, 2011 (Silva et al, 2010). Feng et al (2012) observaram que a bactéria Pseudomonas zeshuii BY-1 foi capaz de degradar 88,7% do fomesafen aplicado ao meio de cultura.…”

Section: Resultsunclassified

Persistência do Fomesafen em argissolo vermelho-amarelo em dois sistemas de cultivo

et al. 2014

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RESUMO -Alguns herbicidas têm persistência longa no solo, o que pode levar à intoxicação de culturas sucessoras (carryover), plantadas em rotação. Objetivou-se com este trabalho avaliar a persistência do herbicida fomesafen em Argissolo Vermelho-Amarelo cultivado com feijão nos sistemas de plantio direto e convencional, caracterizando dois experimentos distintos. O delineamento utilizado foi o de blocos casualizados com quatro repetições, arranjados em parcelas subdivididas, em que as parcelas representavam as doses do herbicida (0,0, 125, 250 e 500 g ha -1 ) e as subparcelas, as épocas de coleta de solo (15, 30, 45, 60, 75, 90, 105, 120, 135 e 150 dias após a aplicação dos herbicidas). As amostras de solo foram coletadas de 15 em 15 dias, nas entrelinhas centrais das parcelas, e transferidas para vasos plásticos de 280 cm 3 , onde se semeou o sorgo como indicador biológico da presença de fomesafen. Aos 21 dias após a emergência, avaliou-se a intoxicação das plantas, numa escala em que 0 (zero) representava a ausência total de sintomas e 100, a morte da planta. A produtividade do feijoeiro não foi alterada pelas doses do fomesafen, não havendo diferença entre os tratamentos. Com o aumento da dose de fomesafen, o período de sua persistência nas amostras de solo foi maior. A persistência do fomesafen no solo varia em função do sistema de plantio e da dose aplicada; o intervalo de segurança após sua aplicação em culturas sensíveis é menor quando se pratica o plantio direto. (0.0, 125, 250, 500 g ha -1 ) and the split-plots, the soil collection times (15, 30, 45, 60, 75, 90, 105, 120, 135, and 150 Palavras-chave: bioensaio, carryover, impacto ambiental. ABSTRACT -Some herbicides have long persistence in the soil, which can lead to poisoning in successive crops (carryover) planted in rotation. The objective of this study was to evaluate the persistence of fomesafen in Red-Yellow Ultisol cultivated with common bean under the no-tillage and conventional systems, featuring two separate experiments. The experiments were arranged in a randomized block design with four replications arranged in a split plot, with the plots being the herbicide doses

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“…The leaching of a chemical compound in the soil is influenced by its physicochemical characteristics, whether ionic (basic or acidic) or non-ionic (neutral) (Inoue et al, 2003), by soil attributes such as pH and organic matter , and also by the edaphoclimatic conditions of the place of cultivation (Andrade et al, 2011). Soils with high adsorption capacity make herbicides less mobile, resulting in longer residues of these compounds in the superficial layers of the soil (Queiroz et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Estimation of Sulfentrazone Leaching in Isolated Application and in Mixture with Glyphosate

et al. 2019

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As an alternative to control of resistant biotypes, farmers have resorted to the use of herbicides that have residual soil activity and good pre-emergence action. One of the most used mixtures in Brazil is that of sulfentrazone + glyphosate. When a herbicide has a pre-emergence action, small leaching of its molecules is necessary for its superficial incorporation into the soil, where most of the weed seeds are found. However, if excessive leaching occurs, the herbicide may have reduced efficiency in controlling weed, increasing the risks of groundwater contamination. In this study, sulfentrazone leaching was evaluated in columns with soil, in isolated applications and in mixture with formulations of glyphosate (Roundup Ready®, Roundup Ultra® and Zapp Qi®). For this, the columns were filled with samples of Red-Yellow Latosol, collected in the 0-20 cm depth layer. After moistening the columns to near field capacity, the herbicides were applied to the top and, 24 hours later, a 60 mm rainfall was simulated. After 72 hours, the columns were sectioned in 5 cm segments, collecting the soil from each segment. In these samples, indicator plants (Sorghum bicolor) were cultivated for the presence of the herbicide. It is concluded that, in general, glyphosate does not alter the leaching potential of sulfentrazone in the Red-Yellow Latosol. However, mixtures with Roundup Ready® and Zapp Qi® reduce the sorptive forces of sulfentrazone to soil colloids. Therefore, in some types of soil, herbicide desorption may occur with greater intensity, making its availability in the soil solution more difficult. This may result in better control of plants and/or intoxication of sensitive crops.

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Potencial De Lixiviação De Herbicidas Em Solos Agrícolas Na Região Do Alto Paranaíba (Mg)

Cited by 8 publications

References 4 publications

Transport of Atrazine Via Leaching in Agricultural Soil with Mineral Oil Addition

Transport of Atrazine Via Leaching in Agricultural Soil with Mineral Oil Addition

Persistência do Fomesafen em argissolo vermelho-amarelo em dois sistemas de cultivo

Estimation of Sulfentrazone Leaching in Isolated Application and in Mixture with Glyphosate

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