Movement of atrazine by runoff from sugarcane lands in the superhumid region of Mauritius
| MSI99P3248 | |
| Mooniaruck, A Umrit, G Ng Kee Kwong, K F | |
| Movement of atrazine by runoff from sugarcane lands in the superhumid region of Mauritius | |
| Lalouette, J. A., Bachraz, D. Y., and Sukurdeep, N. (eds), Proceedings of the fourth Annual Meeting of Agricultural Scientists, Boname Hall, MSIRI, Réduit, Mauritius, 21-22 October 1999. | |
| book chapter | |
| 2001 | |
| p. 159-164 | |
| Réduit: Food and Agricultural Research Council (FARC) | |
| En | |
| The movement of atrazine by surface and subsurface (less than 90 cm) run-offs was studied on 500 m2 plots at Valetta where the mean rainfall exceeds 3500 mm and sugar cane is planted on land with 5 to 12 degree slopes. On 1 December 1997, atrazine was applied at 2.7 kg a.i. per hectare to ratoon cane with trash lined in alternate interrows, and at 4.0 kg a.i. per hectare to a similar plot left bare. Surface and subsurface run-offs resulting from five high rainfall events occurring until harvest in August 1998 were collected in metal lined troughs installed at the end of each plot. Quantification of atrazine in the run-offs was done by Gas Chromatography Mass Spectrophotometer (GC-MS) and High Performance Liquid Chromatography (HPLC). The present study showed that only 0.02 per cent of atrazine applied to the bare plot was lost by surface runoff as compared to 0.05 per cent in the plot cultivated with sugar cane. Higher concentration of atrazine was observed in subsurface water than in the surface runoff. This indicates that quantification of atrazine in surface runoff alone underestimated the amount of atrazine moved and that the studies carried out in small plots may not provide an accurate reflection of the actual movement of atrazine from sugar cane fields. | |
| SUGARCANE POLLUTION ATRAZINE RUNOFF LAND USE SUSPENDED SEDIMENT | |
| MAURITIUS | |
| Water pollution | |
| 1999-10-14 | |
| En | |
| MSIRI | |
| LIST | |
| CHEM |