Herbicide Uptake and Regrowth Ability of Tall Fescue and Orchardgrass in S-Metolachlor-Contaminated Leachates from Sand Pot Experiment

Euro Pannacci, Daniele Del Buono, Maria Luce Bartucca, Luigi Nasini, Primo Proietti and Francesco Tei
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Euro Pannacci: Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74-06121 Perugia, Italy
Daniele Del Buono: Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74-06121 Perugia, Italy
Maria Luce Bartucca: Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74-06121 Perugia, Italy
Luigi Nasini: Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74-06121 Perugia, Italy
Primo Proietti: Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74-06121 Perugia, Italy
Francesco Tei: Department of Agricultural, Food and Environmental Sciences, University of Perugia, Borgo XX Giugno, 74-06121 Perugia, Italy

Agriculture, 2020, vol. 10, issue 10, 1-10

Abstract: The ability of tall fescue ( Festuca arundinacea L.) and orchardgrass ( Dactylis glomerata L.), to remediate leachates polluted with S-metolachlor (SMR) has been assessed in static hydroponic cultures. Different SMR concentrations (0.25, 1.00, and 2.00 mg L −1 ) were applied in the growth media to test the capacity of the two grasses to tolerate and uptake this herbicide, and to regrowth after mowing. S-metolachlor did not severely affect the dry weight aerial biomass of D. glomerata and F. arundinacea , which were reduced by 5% and 10%, respectively, when compared to the untreated control, regardless of the SMR concentrations in the leachate. The regrowth ability of aerial biomass after mowing was reduced at the different SMR concentrations, according to a dose–response model. The SMR concentrations, which reduced the regrowth ability of F. arundinacea and D. glomerata of 10% and 30%, were found to be EC 10 (Effective Concentration) of 0.21 and 0.38 mg L −1 and EC 30 of 0.45 and 0.74 mg L −1 , respectively. These values could be assumed as the SMR concentrations that were well tolerated by both the species, without compromising their aerial biomass regrowth. Finally, tall fescue was found to be more effective and faster than orchardgrass in decreasing the SMR in the leachate and, therefore, this species should be preferred to be used in the vegetative buffer strips (VBS).

Keywords: herbicide pollution; phytoremediation; Festuca arundinacea L.; Dactylis glomerata L.; S-metolachlor; vegetative buffer strips (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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