عنوان مقاله [English]
نویسندگان [English]چکیده [English]
The use of fertilizers in agriculture is a potential source of environmental pollution especially in water quality and soil resources. The study of effective factors on water and nutrient transport through soil profile is helpful for nutrient management to minimize adverse impacts on environment and nitrate leaching below root zone. In this study, for assessing the nitrate transportation below the root zone, measurements were done by spectrophotometer method. A field site was conducted under corn production in a cultivation period of 2003. The DRAINMOD-N model was used to simulate nitrate transportation. This model is calibrated by adjusting nitrification, denitrification rate constants to reach the best fit between measured and predicted data. Results indicate that predicted nitrate concentration by model was close to measured nitrate concentration. The correlation between measured and predicted data was significant in one percent level. Results and scenarios indicate that the model can be used as a tool to manage environmental pollution in irrigated areas.