Soil microbial communities and glyphosate decay in soils with different herbicide application history

Guijarro, Keren Hernández; Aparicio, Virginia; Gerónimo, Eduardo De; Castellote, Martín; Figuerola, Eva Lucia Margarita; Costa, José Luís; Erijman, Leonardo

doi:10.1016/j.scitotenv.2018.03.393

Cited by 69 publications

(35 citation statements)

References 60 publications

(71 reference statements)

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“…The dissipation of glyphosate and the formation/dissipation of AMPA in the no-till system must therefore be evaluated and compared with that in conventional agriculture to determine whether and to what extent the altered soil properties affect their persistence. Glyphosate dissipation and AMPA formation/ dissipation in agricultural soils have been extensively evaluated both in laboratory (Gimsing et al 2004b;Accinelli et al 2005;Prata et al 2005;Stenrød et al 2006;Weaver et al 2007;Simonsen et al 2008;Zablotowicz et al 2009;Lancaster et al 2010;Aslam et al 2015;Cassigneul et al 2016;Bento et al 2016;Góngora-Echeverría et al 2019;Okada et al 2019) and field studies (Mamy et al 2008;Syan et al 2014;Bandana et al 2015;Yang et al 2015;Guijarro et al 2018;Bento et al 2019;Brindhavani et al 2020). Among the above-cited papers, the studies of Aslam et al (2015) and Bento et al (2019) regarded non-tilled soils exclusively.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Glyphosate and Aminomethylphosphonic Acid in Soil Under Conventional and Conservation Tillage

et al. 2021

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This study investigates the adsorption and dissipation of glyphosate and the formation/dissipation of AMPA in non-tilled (NT) and conventionally tilled (CT) soil at 0–5 and 5–20 cm depth. Glyphosate adsorption was mainly related to the different NT and CT soil properties (clay and amorphous Al oxides), whereas an effect of the soil management could not be identified. Glyphosate dissipation was initially fast, and it slowed down later. The initial glyphosate concentration in NT soil at 0–5 cm was significantly lower than the dose applied due to the interception by the weeds and crop residues. AMPA began to form early after treatment and persisted longer than glyphosate. The DT50 range was 8–18 days for glyphosate and 99–250 days for AMPA. Longer glyphosate and AMPA DT50 were observed in NT soil compared to CT soil but, for glyphosate, the difference was significant only at 5–20 cm. Higher glyphosate and AMPA concentrations were detected in NT than in CT soil at the end of the study at 0–5 cm. The differences in glyphosate and AMPA DT50 and persistence were mainly attributable to the influence of different NT and CT soil characteristics. However, other factors could have contributed to the different glyphosate and AMPA dynamics between the soils, like glyphosate wash-off from crop residues on NT soil with the rainfall, the delayed glyphosate return to the soil by weed root exudation or weeds decomposition, and the NT soil compaction which may have reduced the microbial degradation of glyphosate at low concentrations. Graphic abstract

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Section: Introductionmentioning

confidence: 99%

Dynamics of Glyphosate and Aminomethylphosphonic Acid in Soil Under Conventional and Conservation Tillage

et al. 2021

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“…These communities may encode active ingredient enzymes (e.g. oxidoreductases) 65 that use GLY as a source of carbon, nitrogen and phosphorus 66 .…”

Section: Discussionmentioning

confidence: 99%

Pesticides in a case study on no-tillage farming systems and surrounding forest patches in Brazil

Silva

Nicola

DUDAS

et al. 2021

Sci Rep

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With the growing global concern on pesticide management, the relationship between its environmental recalcitrance, food security and human health has never been more relevant. Pesticides residues are known to cause significant environmental contamination. Here, we present a case study on long-term no-tillage farming systems in Brazil, where Glyphosate (GLY) has been applied for more than 35 years. GLY and its main breakdown product, aminomethylphosphonic acid (AMPA) were determined in topsoil (0–10 cm) samples from no-tillage fields and nearby subtropical secondary forests by high-performance liquid chromatography coupled with a fluorescence detector. In addition, the presence of carbamates, organochlorines, organophosphates and triazines were also screened for. GLY and AMPA were present in all soil samples, reaching values higher than those described for soils so far in the literature. A significant decrease for AMPA was observed only between the secondary forest and the farm's middle slope for site B. GLY and AMPA were observed respectively at peak concentrations of 66.38 and 26.03 mg/kg soil. GLY was strongly associated with forest soil properties, while AMPA associated more with no-tillage soil properties. Soil texture was a significant factor contributing to discrimination of the results as clay and sand contents affect GLY and AMPA retention in soils. This was the first study to report DDT and metabolites in consolidated no-tillage soils in Brazil (a pesticide fully banned since 2009). Based on human risk assessment conducted herein and the potential risk of GLY to local soil communities, this study offers a baseline for future studies on potential adverse effects on soil biota, and mechanistic studies.

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“…Chemical herbicides are widely used to remove weeds in conventional farming (Huang et al 2016), but the overused application of herbicide lead to serious environmental risks (Lapworth et al 2012;Guijarro et al 2018 ). This study reserved the weed layer, and studied its influence on soil and water conservation in intercropping systems.…”

Section: Discussionmentioning

confidence: 99%

Synergistic effects of vegetation layers of maize and potato intercropping on soil erosion on sloping land in Yunnan Province, China

Zhang

Fullen

et al. 2020

J. Mt. Sci.

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Intercropping, as an overyielding system, can decrease soil erosion on sloping land through the presence of dense canopy covers. However, the structure mechanism in canopy is still unclear. We conducted a two-year field experiment on runoff plots, exploring whether the interaction between vegetation layers reduce soil erosion in maize and potato intercropping systems. The maize, potato, and weed layers in the intercropping system were removed by a single layer, two layers and three layers, respectively (total of 8 treatments including all layers removed as the control). Then, throughfall, runoff and sediment were measured at the plot and row scale on a weekly basis. Based on the difference between each treatment and the control, we calculated and found a relative reduction of runoff and sediment by any combination of the two vegetation layers greater than the sum of each single layer. In 2016 and 2017, the highest relative reduction of runoff reached 15.65 and 46.73%, respectively. Sediment loss decreased by 33.96 and 42.77%, respectively. Moreover, runoff and sediment reduced by the combination of all vegetation layers (no layers removed) was also larger than the sum of that by each single layer. In 2016 and 2017, the highest relative reduction of runoff reached 7.32 and 3.48%, respectively. So, there were synergistic effects among multi-level (two or three layers) vegetation layers in terms of decreasing soil erosion on sloping land. Maize redistributes more throughfall at the maize intra-specific row and the maize and potato inter-specific, which is favourable for the synergistic effect of reducing soil erosion. This finding shows an important mechanism of maize and potato intercropping for soil and water conservation, and may promote the application of diverse cropping systems for sustainable agriculture in mountainous areas.

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Soil microbial communities and glyphosate decay in soils with different herbicide application history

Cited by 69 publications

References 60 publications

Dynamics of Glyphosate and Aminomethylphosphonic Acid in Soil Under Conventional and Conservation Tillage

Dynamics of Glyphosate and Aminomethylphosphonic Acid in Soil Under Conventional and Conservation Tillage

Pesticides in a case study on no-tillage farming systems and surrounding forest patches in Brazil

Synergistic effects of vegetation layers of maize and potato intercropping on soil erosion on sloping land in Yunnan Province, China

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