کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9451329 1307809 2005 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Herbicide losses in runoff events from a field with a low slope: Role of a vegetative filter strip
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Herbicide losses in runoff events from a field with a low slope: Role of a vegetative filter strip
چکیده انگلیسی
Herbicide runoff and the effects of a narrow vegetative filter strip (VFS) were studied on an arable field in the low-lying plains of the Veneto Region (north-east Italy). Cultivated plots were compared with and without a 6 m wide VFS composed of trees, shrubs and grass. Natural and simulated runoff were monitored during 2000 and 2001. Herbicides applied on the field were: metolachlor (2184-2254 g ha−1), terbuthylazine (1000-1127 g ha−1) and isoproturon (1000 g ha−1). The VFS reduced both runoff depth (10.2-91.2%) and herbicide losses (85.7-97.9%) in the monitored rainfall events. Total herbicide loss with runoff was low (0.69-3.98 g ha−1 without VFS, less than 0.27 g ha−1 with VFS), but concentrations were sometimes very high, especially of terbuthylazine and isoproturon during the first events after treatment. In these events there was a high probability of exceeding the ecotoxicological endpoint for algae, but the VFS helped to reduce the potential risk. Two VFS effectiveness mechanisms were identified: (i) dilution, and (ii) a “sponge-like” effect, which temporarily trapped chemicals inside the VFS before releasing them.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 61, Issue 5, November 2005, Pages 717-725
نویسندگان
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