Tillage And Fallow Period Management Effects
On The Fate Of The Herbicide Isoxaflutole In An
Irrigated Continuous-maize Field
Author(s)
L. Alletto, Y. Coquet, P. Benoit & E. Justes
Abstract
The effects of two tillage treatments and two fallow period managements on
water drainage and leaching of isoxaflutole were evaluated over a 4-year period
(2005-2008). Tillage treatments were a conventional tillage (CT) with
mouldboard ploughing and a conservation tillage (MT) with disk harrowing.
Management of the fallow periods were bare soil (BS) or soil sown with a cover
crop (CC) after maize harvest. Tillage and fallow period management had
significant effects on water flow rate at 40 cm-depth. According to the year and
cropping system, cumulated herbicide losses ranged from 2% under MT_CC in
2005 to more than 30% under CT_BS in 2006. Results showed that best
agricultural practices, such as conservation tillage and cover crops during fallow
period could be an efficient way to reduce herbicide losses at the field scale.
Keywords: conventional tillage, conservation tillage, cover crop, leaching,
diketonitrile metabolite.
1 Introduction
Herbicides are among the most important nonpoint-source pollutants in Europe.
The objectives fixed by the EU Water Framework Directive (Directive
2000/60/CE) to prevent and control groundwater pollution by herbicides involve
a better assessment of environmental impacts of agricultural practices.
Keywords
conventional tillage, conservation tillage, cover crop, leaching,
diketonitrile metabolite
Related Book
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