Ação de Eleusine coracana na remediação de solos contaminados com picloram

Silva, L.O.C.; Silva, A.A; Queiroz, Maria Eliana Lopes Ribeiro de; Lima, Cláudio F.; Rocha, Paulo Roberto Ribeiro; D'Antonino, L.

doi:10.1590/s0100-83582012000300019

Cited by 8 publications

(7 citation statements)

References 18 publications

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“…A aplicação do picloram reduziu a massa da matéria seca das plantas de feijoeiro, cultivados em solos remediados por braquiária após a aplicação do herbicida, sendo que, a última dose do produto causou a morte das plantas bioindicadoras (Figura 1). Silva et al (2012) Nas três primeiras doses do picloram não foi constatada diferença na condutância estomática (Gs) de plantas de feijoeiro cultivadas em solos remediadas por braquiária, no entanto, para as doses 8 e 16 g ha -1 do herbicida observou tendência de decréscimo da Gs (Figura 2B). A redução da Gs pode ter sido provocada pela ação do picloram, que estimula a produção do etileno nas plantas, o qual por sua vez estimula a síntese do ácido abscísico, que se acumula inicialmente nas folhas e depois é translocado pela planta, atuando no fechamento estomático (Mercier, 2004).…”

Section: Resultsunclassified

Características fisiológicas do feijoeiro cultivado em solos após fitorremediação do picloram

Franco¹,

Lemos²,

Aguiar³

et al. 2015

RBHerbicidas

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A fitorremediação tem sido relatada como técnica promissora para a descontaminação de solos com resíduos de herbicidas. Para herbicidas hormonais, há dificuldade na determinação de resíduos pela técnica do bioensaio em função da variação na resposta em crescimento apresentada pela indicadora. Objetivou-se com esse trabalho avaliar o efeito de subdoses do picloram, em solos fitorremediados com braquiária, nas características fisiológicas do feijoeiro. O ensaio foi realizado em ambiente protegido no delineamento de blocos ao acaso. Aplicou-se diferentes doses do picloram (0; 2; 4; 8; 16 e 32 g ha-1), sendo posteriormente cultivado com braquiária por 120 dias. Nesta data retirou-se a braquiária dos vasos e semeou o feijão como planta bioindicadora, sendo depois de 30 dias avaliada as características fisiológicas e a matéria seca do feijoeiro. Mesmo após a remediação por plantas de braquiária, as subdoses do picloram afetaram as características fisiológicas do feijoeiro, principalmente a taxa fotossintética e a eficiência no uso da água, sendo essas variáveis as mais indicadas para se avaliar o resíduo do herbicida no solo. A redução dessas variáveis promoveu menor acúmulo de biomassa total das plantas de feijão nos solos fitorremediados. A segunda maior dose do herbicida provocou também redução da relação Fv/Fm abaixo de 0,75, indicando algum tipo de estresse do aparato fotossintético das folhas do feijoeiro.

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Section: Resultsunclassified

Características fisiológicas do feijoeiro cultivado em solos após fitorremediação do picloram

Franco¹,

Lemos²,

Aguiar³

et al. 2015

RBHerbicidas

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“…These results corroborate with studies such as D' Antonino et al (2009), who evaluated the use of different cultures in the phytoremediation of picloram, observed that after 150 days of the application of 2,4-D there was still the residue of the herbicide. In addition, Franco et al (2014) and Silva et al (2012) also observed the presence of picloram even in small quantities 300 days and 196 days after sowing Urochloa brizantha and Eleusine coracana, which was the remedy species in the field, respectively.…”

Section: Journal Of Agricultural Studiesmentioning

confidence: 91%

Landrace Maize Varieties Used as Phytoremediation of Contaminated Soil with 2,4-D + Picloram

Rocha

Yamashita

Silva

et al. 2020

JAS

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The use of herbicides such as 2,4-D + picloram in livestock areas can contaminate and hinder the use of the production system for subsequent crops of other crops. The objective of the research was to evaluate the ability of landrace maize varieties to reduce contamination of soil treated with 2,4-D + picloram, simulating existing conditions in the Amazon Biome. The experiment consisted of 6 phytoremediation treatments (4 landrace maize varieties, 1 hybrid maize cultivar and 1 control without cultivation), 2 herbicide conditions (with and without) and 3 evaluation periods (28, 56 and 84 days). The soil was contaminated and the maize was subsequently cultivated under the herbicide conditions mentioned above. After each evaluation period, soil samples were collected, which were used to mount bioassays by growing cucumber (plants sensitive to the herbicide). Emergence, aerial dry mass and root dry mass were evaluated. All variables were affected by the herbicide residue. However, the reduction in herbicide persistence in each evaluation period was notable, resulting in the normal reestablishment of bioindicator seedlings, especially in the last evaluation at 84 days. The samples obtained in the soil cultivated with the varieties CR purple and CR white showed the best conditions for the development of cucumber, demonstrating the potential to be studied in phytoremediation programs.

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“…The use of herbicides to control weeds has been fundamental in the cultivation of large agricultural areas (Silva et al, 2012). In pastures, the herbicide picloram (4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid) stands out, being highly active in dicotyledons (Rodrigues & Almeida, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Soil pH stands out among the soil attributes which influence the behavior from herbicides with ionic character to organic and mineral colloids (Silva et al, 2007). Thus, liming may eventually alter picloram availability in the soil in a significant manner (D' Antonino et al, 2012), possibly intensifying its leaching.…”

Section: Introductionmentioning

confidence: 99%

Liming on picloram leaching in dystrophic Red Yellow Latosol

Franceschi

Arantes

Andrade

et al. 2019

Rev. bras. eng. agríc. ambient.

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The practice of liming may influence the leaching of herbicides in soils, especially those with weak acid character, such as picloram. The study on leaching, preserving soil structure, is an important factor when one intends to understand the dynamics of herbicides and environmental impacts. Thus, the effect of liming on picloram leaching in a dystrophic Red Yellow Latosol under field conditions was studied using a bioindicator plant. The experiment was set up in a completely randomized design (CRD), in split-plot scheme, with factorial in the plot. The factors of the plot corresponded to two soil conditions (presence and absence of liming) and 5 picloram concentrations (0; 384; 768; 1152; 1536 g ha-1), and the factor of the subplot was 5 soil depths (0-8, 8-16, 16-24, 24-32 and 32-40 cm), with four replicates. Pipes were introduced into the soil and, in part of the treatments, limestone was applied superficially. After ninety days, the different doses of picloram were applied on the surface of each pipe and these pipes were withdrawn after an accumulated rainfall of 128 mm, to perform the bioassay using cucumber plants (Cucumis sativus). Evaluations of plant development (phytotoxicity and shoot biomass) were carried out 21 days after sowing. It was concluded that picloram showed high leaching rate under all studied conditions and liming increased picloram leaching at doses lower than 768 g ha-1.

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Ação de Eleusine coracana na remediação de solos contaminados com picloram

Cited by 8 publications

References 18 publications

Características fisiológicas do feijoeiro cultivado em solos após fitorremediação do picloram

Características fisiológicas do feijoeiro cultivado em solos após fitorremediação do picloram

Landrace Maize Varieties Used as Phytoremediation of Contaminated Soil with 2,4-D + Picloram

Liming on picloram leaching in dystrophic Red Yellow Latosol

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