Environmental Fate of the Herbicide MCPA in Two Soils as Affected by the Presence of Wheat Ash

Hiller, Edgar; Bartaľ, M.; Milicka, J.; Čerňanský, Slavomír

doi:10.1007/s11270-008-9820-y

Cited by 22 publications

(5 citation statements)

References 36 publications

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“…Bioavailability of diuron to soil microorganisms was decreased by the presence of wheat char in the soil, due to the increase in herbicide sorption. For the weak acidic herbicide MCPA, a decrease in biodegradation because of wheat ash amendment was also reported by Hiller et al (2009). The half-life of MCPA increased by a factor of 4.5 in the sandy loam soil with the 1% (w/w) wheat ash amendment, and correspondingly increased by 2.6 times in the sandy soil.…”

Section: Effect Of Carbonaceous Materials On Pesticide Degradationsupporting

confidence: 57%

Impacts of Biochar (Black Carbon) Additions on the Sorption and Efficacy of Herbicides

Mesa¹,

Spokas²

2011

Herbicides and Environment

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Section: Effect Of Carbonaceous Materials On Pesticide Degradationsupporting

confidence: 57%

Impacts of Biochar (Black Carbon) Additions on the Sorption and Efficacy of Herbicides

Mesa¹,

Spokas²

2011

Herbicides and Environment

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“…If the incubation took place at 10°C, MCPA was no longer detectable after 25 days. Similar detection times for MCPA were reported by Baelum et al (2006), Baelum et al (2006), Hiller et al (2009), and Peña et al (2015).…”

Section: Resultssupporting

confidence: 87%

Temperature and soil moisture change microbial allocation of pesticide‐derived carbon

Wirsching,

Rodriguez,

Ditterich

et al. 2023

European J Soil Science

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Temperature and soil moisture are known to control pesticide mineralization. Half‐life times () derived from pesticide mineralization curves generally indicate longer residence times at low soil temperature and moisture but do not consider potential changes in the microbial allocation of pesticide‐derived carbon (C). We aimed to determine carbon use efficiency (, formation of new biomass relative to total C uptake) to better understand microbial utilization of pesticide‐derived C under different environmental conditions and to support the conventional description of degradation dynamics based on mineralization. We performed a microcosm experiment at two MCPA (2‐methyl‐4‐chlorophenoxyacetic acid) concentrations (1 and 20 mg kg−1) and defined 20°C/pF 1.8 as optimal and 10°C/pF 3.5 as limiting environmental conditions. After 4 weeks, 70% of the initially applied MCPA was mineralized under optimal conditions but MCPA mineralization reached less than 25% under limiting conditions. However, under limiting conditions, an increase in was observed, indicating a shift towards anabolic utilization of MCPA‐derived C. In this case, increased C assimilation implied C storage or the formation of precursor compounds to support resistance mechanisms, rather than actual growth since we did not find an increase in the tfdA gene relevant to MCPA degradation. We were able to confirm the assumption that under limiting conditions, C assimilation increases relative to mineralization and that C redistribution, may serve as an explanation for the difference between mineralization and MCPA dissipation‐derived degradation dynamics. In addition, by introducing to the temperature‐ and moisture‐dependent degradation of pesticides, we can capture the underlying microbial constraints and adaptive mechanisms to changing environmental conditions.

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“…Activation of BC3 at 200 °C for 2 h (BC4) slightly increased the sorption of the herbicide on the amended soil, as compared to the sorption on the soil amended with BC3. The effect of wheat ash on MCPA sorption was studied by Hiller et al, 36 who observed a 10À 15-fold increase in K d values when a sandy soil and a sandy loam soil were amended with 1% ash. These authors suggested that the increase of MCPA sorption on the wheat ash amended soils was due to the organic carbon content of the ash and to the greater surface affinity for MCPA.…”

Section: ' Materials and Methodsmentioning

confidence: 99%

Comparative Sorption and Leaching Study of the Herbicides Fluometuron and 4-Chloro-2-methylphenoxyacetic Acid (MCPA) in a Soil Amended with Biochars and Other Sorbents

Cabrera

Cox

Spokas

et al. 2011

J. Agric. Food Chem.

129

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Biochar, the solid residual remaining after the thermochemical transformation of biomass for carbon sequestration, has been proposed to be used as a soil amendment, because of its agronomic benefits. The effect of amending soil with six biochars made from different feedstocks on the sorption and leaching of fluometuron and 4-chloro-2-methylphenoxyacetic acid (MCPA) was compared to the effect of other sorbents: an activated carbon, a Ca-rich Arizona montmorillonite modified with hexadecyltrimethylammonium organic cation (SA-HDTMA), and an agricultural organic residue from olive oil production (OOW). Soil was amended at 2% (w/w), and studies were performed following a batch equilibration procedure. Sorption of both herbicides increased in all amended soils, but decreased in soil amended with a biochar produced from macadamia nut shells made with fast pyrolysis. Lower leaching of the herbicides was observed in the soils amended with the biochars with higher surface areas BC5 and BC6 and the organoclay (OCl). Despite the increase in herbicide sorption in soils amended with two hardwood biochars (BC1 and BC3) and OOW, leaching of fluometuron and MCPA was enhanced with the addition of these amendments as compared to the unamended soil. The increased leaching is due to some amendments' soluble organic compounds, which compete or associate with herbicide molecules, enhancing their soil mobility. Thus, the results indicate that not all biochar amendments will increase sorption and decrease leaching of fluometuron and MCPA. Furthermore, the amount and composition of the organic carbon (OC) content of the amendment, especially the soluble part (DOC), can play an important role in the sorption and leaching of these herbicides.

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Environmental Fate of the Herbicide MCPA in Two Soils as Affected by the Presence of Wheat Ash

Cited by 22 publications

References 36 publications

Impacts of Biochar (Black Carbon) Additions on the Sorption and Efficacy of Herbicides

Impacts of Biochar (Black Carbon) Additions on the Sorption and Efficacy of Herbicides

Temperature and soil moisture change microbial allocation of pesticide‐derived carbon

Comparative Sorption and Leaching Study of the Herbicides Fluometuron and 4-Chloro-2-methylphenoxyacetic Acid (MCPA) in a Soil Amended with Biochars and Other Sorbents

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