Preventing Pesticide Contamination of Aquifers by Best Management Practices

摘要

The research site was located at the University of Delaware Research andEducation Center near Georgetown, DE. Eight plots were established to investigate the movement of alachlor, simazine, atrazine, metolachlor, and cyanazine under ridge tillage and reduced tillage and the best management practices of increasing the organic matter by the use of poultry manure and a winter cover crop of white clover and rye. Simulated rainfall (75 mm) of a 1 hour, 10 year return period under dry and wet conditions was applied five days after the herbicides were applied by the first two years and a 14 day, 10 year return period rainfall was simulated the third year. Ground water and the vadose zone was monitored for pesticide transport. The soil water solution was sampled below the root zone using wick pan lysimeters.