Assessment of herbicide sorption by biochars and organic matter associated with soil and sediment

Sun, Ke; Gao, Bo; Ro, Kyoung S.; Novak, Jeff; Wang, Ziying; Herbert, Stephen J.; Xing, Baoshan

doi:10.1016/j.envpol.2011.12.015

Cited by 107 publications

(48 citation statements)

References 34 publications

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“…Reduced leaching must be balanced with increased soil residence time since sorption to biochar may limit herbicide availability to microbial communities and suppress biodegradation in soils (Mello De Capitani et al, 2007). Evidence suggests that the effect of biochar on herbicide behavior is dependent on pyrolysis conditions, source material, and soil type (Sun et al, 2012b). Consequently, the longer term effects of biochar on pesticide sorption are unclear.…”

Section: Pesticidesmentioning

confidence: 99%

Application of Biochar for Soil Remediation

Sizmur

Puga

Moreno‐Jiménez

et al. 2015

SSSA Special Publications

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Section: Pesticidesmentioning

confidence: 99%

Application of Biochar for Soil Remediation

Sizmur

Puga

Moreno‐Jiménez

et al. 2015

SSSA Special Publications

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“…Sorption of oxadiazon in soils cultivated in the Brazilian Cerrado nature of the OM of the soil has been shown to be the key to determine the sorption of nonionic herbicides (Correia & Langenbach, 2006). The molecular OM and its complex structure influence the behavior of fluridone and norflurazon, providing greater sorption (Sun et al, 2012). In China, the amount of sorption of butachlor in soils (1.50 a 4.78% de OM) was positively correlated with the OM content of the soil (Xu et al, 2005).…”

Section: Resultsmentioning

confidence: 83%

“…The LD50 (lethal rate able to inhibit 50% of the dry matter accumulation of the bio-indicator) and the confidence interval of 95% were determined by Probit analysis (Goss et al, 2009). From the data obtained from LD50 on substrates of soil and sand, the RS equation was used = [(LD50soil -LD50sand)/LD50sand] (Souza et al, 1996), to express the relation of sorption (RS) of the soil compared to the response obtained in sand by means of bioassay as an indirect method for quantitation of waste (Szmigielska et al, 1998). It is considered that the higher values of RS indicate higher sorption capacity of the herbicide studied into the soil and, therefore, a lower potential for leaching of the herbicide into the soil profile.…”

Section: Methodsmentioning

confidence: 99%

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Sorption of oxadiazon in soils cultivated in the brazilian cerrado

et al. 2014

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-The objective of this study was to evaluate oxadiazon sorption in different soils of the Brazilian Cerrado, highlighting the correlations of lethal doses of this herbicide capable of inhibiting 50% of the dry matter accumulation of the bio-indicator (LD50) among the chemical characteristics of the soil and its direct and indirect effects. The experiment was carried out in a greenhouse in a randomized block design and four repetitions. Each experimental unit consisted of a pot with increasing rates of oxadiazon and oat (Avena sativa), as the bio-indicator species. For sorption evaluation, washed sand and 22 soils (substrates) from Cerrado Brazilian's Alliaceae cultivated areas were used. LD50 and sorption ratio (SR) = [(LD50soil -LD50sand)/ LD50sand] to the substrates were determined. Pearson correlation analysis was performed between the chemical characteristics of the substrates and the LD50 of oxadiazon. A path analysis was quantified, to deploy only the significant correlations estimated in direct and indirect effects of the characters on LD50, which is a basic variable. A more pronounced LD50 (528.09 g ha -1 ) for the Cerrado soil sample resulted in higher SR (> 53.00), while in the washed sand substrate, LD50 corresponded only to 9.74 g ha -1 of the oxadiazon (available in soil). It was concluded that oxadiazon sorption is influenced by the chemical characteristics of the soils, highlighting the correlation with pH (CaCl 2 ), magnesium content, aluminum, organic matter, organic carbon, and aluminum saturation.Keywords: bioassay, neutral herbicide, organic matter. RESUMO -Objetivou-se neste estudo avaliar a sorção do oxadiazon em diferentes solos do Cerrado Brasileiro, destacando as correlações da dose letal do herbicida capaz de inibir 50% do acúmulo da massa seca do bioindicador (DL50) entre as características químicas do solo e seus efeitos diretos e indiretos. O experimento foi realizado em casa de vegetação, com delineamento em blocos casualizados com quatro repetições. Cada unidade experimental foi constituída de um vaso com doses crescentes do oxadiazon; utilizou-se a aveia (Avena

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“…Apesar da seletividade às culturas, pouco se conhece do comportamento do oxadiazon nos solos brasileiros; ante o exposto tem sido observada uma forte correlação entre o teor de carbono orgânico do solo e a sorção de herbicidas (Ahangar et al, 2008;Tang et al, 2009;Liu et al, 2010;Sun et al, 2012). Estévez et al (2008) relatam que a sorção de compostos neutros ou não iônicos, como o oxadiazon, parece depender da natureza molecular da matéria orgânica contida no solo.…”

Section: Introductionunclassified

Dinâmica de plantas daninhas após aplicação de oxadiazon com simulação de lâminas d’água e incorporação de material orgânico

Mendes

Reis

et al. 2014

Agraria

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RESUMOObjetivou-se, neste trabalho, determinar o efeito do oxadiazon no comportamento da comunidade de plantas daninhas em diferentes momentos de aplicação de lâminas d'água e incorporação de material orgânico. Utilizou-se o delineamento em blocos casualizados com tratamentos dispostos em esquema fatorial 5 x 2, com 4 repetições. Os tratamentos foram constituídos pela combinação da incorporação (8 t ha -1 ) ou não de material orgânico no solo e do momento de aplicação de lâminas d'água (0; 10 mm antes; 10 mm depois e sequencial de 10 mm antes e depois da aplicação do oxadiazon); além da testemunha (0 mm e 0 g ha -1 de oxadiazon). Foram obtidas a densidade relativa, a frequência relativa, a abundância relativa, o índice de valor de importância (IVI) e o índice de similaridade (IS) da flora de plantas daninhas. Não houve interação significativa entre o material orgânico e as lâminas d'água. A espécie Cyperus rotundus apresentou maior IVI, independente do tratamento avaliado, seguidas da Urochloa decumbens, Galinsoga parviflora, Bidens pilosa e Melampodium perfoliatum. A maior similaridade (IS = 0,75) foi observada entre o tratamento que recebeu a aplicação de 10 mm de lâmina d'água antes associado com o de 10 mm depois de aplicação do oxadiazon.Palavras-chave: herbicida neutro, irrigação, matéria orgânica, similaridade Dynamics of weeds after application of oxadiazon with simulated water depths and incorporation of organic material ABSTRACTThe objective of this work was to determine the effect of oxadiazon in the behavior of the weed community under different moments of application of water depths and incorporation of organic material. A randomized block design was used with treatments arranged in a factorial 5 x 2 with four replications. The treatments consisted of combination of with or without incorporation (8 t ha -1) of organic material in the soil and the moments of application of water depths (0, before 10 mm, after 10 mm, and sequential 10 mm before and after application of oxadiazon), and the control (0 mm water and 0 g ha -1 of oxadiazon). Relative density, relative frequency, relative abundance, importance value index (IVI) and similarity index (SI) of the weed flora were obtained. No significant interaction between the organic material and water depths was observed. Cyperus rotundus showed higher IVI, regardless of the experimental treatment, followed by Urochloa decumbens, Galinsoga parviflora, Bidens pilosa and Melampodium perfoliatum. The highest similarity (SI = 0.75) was observed between treatments with the application of 10 mm water depth before associated with the 10 mm after the application of oxadiazon.

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Assessment of herbicide sorption by biochars and organic matter associated with soil and sediment

Cited by 107 publications

References 34 publications

Application of Biochar for Soil Remediation

Application of Biochar for Soil Remediation

Sorption of oxadiazon in soils cultivated in the brazilian cerrado

Dinâmica de plantas daninhas após aplicação de oxadiazon com simulação de lâminas d’água e incorporação de material orgânico

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