Mobility monitoring of two herbicides in amended soils: A field study for modeling applications

Carpio, M. José; Rodríguez‐Cruz, M. Sonia; García‐Delgado, Carlos; Sánchez-Martín, María J.; Marín-Benito, Jesús M.

doi:10.1016/j.jenvman.2020.110161

Cited by 25 publications

(38 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results confirm that chlorotoluron dissipates faster than flufenacet in the same soils determined at laboratory scale [21]. Both herbicides persisted longer in amended soils due to their higher adsorption and lower bioavailability for degradation [36]. Diflufenican concentration decreased in S and S + GC after 45 days of treatment (Table 3), but no decrease was observed in S + SMS possibly due to different initial adsorption of diflufenican by the soils as reported previously [37].…”

Section: Herbicide Residues In Unamended and Amended Soilssupporting

confidence: 88%

“…In the SMS-and GC-amended soils with herbicides, amendments may minimize the impact of herbicides on soil microbial activity compared to unamended soil (S + H). The herbicides studied were hydrophobic compounds, and adsorption increased in the amended soils [21,36], hampering their bioavailability and their possible use as a carbon source by microorganisms for increasing microbial activity. This effect has also been reported for prosulfocarb and triasulfuron when applied in field plots with GC-amended soils [13,19].…”

Section: Soil Dehydrogenase Activity (Dha)mentioning

confidence: 99%

See 1 more Smart Citation

Soil Microbial Community Changes in a Field Treatment with Chlorotoluron, Flufenacet and Diflufenican and Two Organic Amendments

et al. 2020

Self Cite

View full text Add to dashboard Cite

The soil microbial activity, biomass and structure were evaluated in an unamended (S) and organically amended soil treated with two commercial formulations of the herbicides chlorotoluron (Erturon®) and flufenacet plus diflufenican (Herold®) under field conditions. Soils were amended with spent mushroom substrate (SMS) or green compost (GC). Soil microbial dehydrogenase activity (DHA), biomass and structure determined by the phospholipid fatty acid (PLFA) profiles were recorded at 0, 45, 145, 229 and 339 days after herbicide treatment. The soil DHA values steadily decreased over time in the unamended soil treated with the herbicides, while microbial activity was constant in the amended soils. The amended soils recorded higher values of concentrations of PLFAs. Total soil microbial biomass decreased over time regardless of the organic amendment or the herbicide. Herbicide application sharply decreased the microbial population, with a significant modification of the microbial structure in the unamended soil. In contrast, no significant differences in microbial biomass and structure were detected in S + SMS and S + GC, untreated or treated with herbicides. The application of SMS and GC led to a significant shift in the soil microbial community regardless of the herbicides. The use of SMS and GC as organic amendments had a certain buffer effect on soil DHA and microbial biomass and structure after herbicide application due to the higher adsorption capacity of herbicides by the amended soils.

show abstract

Section: Herbicide Residues In Unamended and Amended Soilssupporting

confidence: 88%

Section: Soil Dehydrogenase Activity (Dha)mentioning

confidence: 99%

Soil Microbial Community Changes in a Field Treatment with Chlorotoluron, Flufenacet and Diflufenican and Two Organic Amendments

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…A holistic view jointly evaluating the different pesticide processes and their interactions affected by the application of the organic amendments will contribute to a more complete and more effective interpretation of the environmental fate of pesticides in amended soils. Despite the potential relevance of the results obtained in this kind of study, only a few assays combine pesticides-organic amendments at field scale [149,[168][169][170].…”

Section: Future Perspectives On the Application Of Pesticides And Organic Amendments In Soilsmentioning

confidence: 99%

Effect of Organic Residues on Pesticide Behavior in Soils: A Review of Laboratory Research

et al. 2021

Self Cite

View full text Add to dashboard Cite

The management of large volumes of organic residues generated in different livestock, urban, agricultural and industrial activities is a topic of environmental and social interest. The high organic matter content of these residues means that their application as soil organic amendments in agriculture is considered one of the more sustainable options, as it could solve the problem of the accumulation of uncontrolled wastes while improving soil quality and avoiding its irreversible degradation. However, the behavior of pesticides applied to increase crop yields could be modified in the presence of these amendments in the soil. This review article addresses how the adsorption–desorption, dissipation and leaching of pesticides in soils is affected by different organic residues usually applied as organic amendments. Based on the results reported from laboratory studies, the influence on these processes has been evaluated of multiple factors related to organic residues (e.g., origin, nature, composition, rates, and incubation time of the amended soils), pesticides (e.g., with different use, structure, characteristics, and application method), and soils with different physicochemical properties. Future perspectives on this topic are also included for highlighting the need to extend these laboratory studies to field and modelling scale to better assess and predict pesticide fate in amended soil scenarios.

show abstract

“…The soil was an Eutric-Chromic Cambisol (IUSS Working Group WRB, 2015) with a sandy-loam texture (80.4% sand, 4.7% silt, and 14.9% clay). The main physicochemical characteristics of both organic residues and unamended and amended soils were determined in air-dried and sieved (<2 mm) samples (Table 1) by standard analytical methods, as reported by Carpio et al [30]. Briefly, the DOC content was determined in organic residues extracts 1/100 w/v or soil extracts 1/2 w/v ratio in deionized water after soil shaking 24 h at 20 • C, centrifugation 20 min at 10,000 rpm, and filtering (Minisart NY 25 filter 0.45 µm, Sartorius Stedim Biotech, Germany).…”

Section: Field Dissipation Studymentioning

confidence: 99%

“…This study therefore pursued the following objectives: (i) study the field dissipation kinetics of the herbicides chlorotoluron and flufenacet after their repeated application at the pre-emergence stage of winter wheat in an agricultural soil unamended and amended with two organic residues, (ii) compare their persistence with that observed the previous year after a first application in the same field experiment, and (iii) assess the influence of soil property evolution and weather conditions on the long-term dissipation and persistence of these herbicides. This study is part of a research project carried out under field conditions involving the dissipation and mobility of chlorotoluron and flufenacet over a 2 year experimental period following an initial, single application of the organic residues to the soil [11,30].…”

Section: Introductionmentioning

confidence: 99%

Accelerated Dissipation of Two Herbicides after Repeated Application in Field Experiments with Organically-Amended Soil

et al. 2021

Self Cite

View full text Add to dashboard Cite

Organic wastes applied as composted amendments may improve the quality of degraded soils and modify the fate of pesticides. This work has set out to study the dissipation kinetics of the herbicides chlorotoluron and flufenacet during their second-year application in field experimental plots with a sandy-loam agricultural soil without amendment (S) and amended with spent mushroom substrate (S + SMS) or green compost (S + GC). The SMS and GC were applied to the soil during the previous winter’s wheat crop campaign (1 year before the second herbicide application) at rates of 140 and 85 t ha−1 (dry weight basis), respectively. The experiment involved randomized complete blocks with plots of 81 m2, including three replicates per soil treatment. Surface soils were sampled after herbicide application for 225 days, and herbicide residues in the soil samples were determined by HPLC-MS. The dissipation curves of both herbicides for the three soil treatments were better fitted to the first order multi-compartment (FOMC) kinetic model. The dissipation rates of the most hydrophobic herbicide, flufenacet, were slower than those for chlorotoluron in both unamended and amended soils. The half-life (DT50) values ranged between 20.7 to 41.1 days for chlorotoluron, and 42.9 to 75.6 days for flufenacet, and they followed the order S > S + SMS > S + GC. The DT50 values of chlorotoluron were close for S + SMS and S + GC, and the DT50 of flufenacet for S was similar to that for S + SMS. These DT50 values decreased up to four times with respect to those calculated after the first application indicating an accelerated dissipation of the herbicides after the second application especially in amended soil in comparison with unamended soil. The persistence of chlorotoluron and flufenacet in an agricultural soil was modified by the effect of the organic amendments, weather conditions, and possibly the repeated application of the compounds under real field conditions.

show abstract

Mobility monitoring of two herbicides in amended soils: A field study for modeling applications

Cited by 25 publications

References 37 publications

Soil Microbial Community Changes in a Field Treatment with Chlorotoluron, Flufenacet and Diflufenican and Two Organic Amendments

Soil Microbial Community Changes in a Field Treatment with Chlorotoluron, Flufenacet and Diflufenican and Two Organic Amendments

Effect of Organic Residues on Pesticide Behavior in Soils: A Review of Laboratory Research

Accelerated Dissipation of Two Herbicides after Repeated Application in Field Experiments with Organically-Amended Soil

Contact Info

Product

Resources

About