Long-term simulations of nitrate leaching from potato production systems in Prince Edward Island, Canada

摘要: LEACHN was employed to simulate nitrate leaching from a representative potato production system in Prince Edward Island (PEI), Canada and enhance the understanding of impacts (Solanum tuberosum L.) on groundwater quality. The model’s performance predicting drainage examined against water table measurements through coupled MODFLOW modeling. calibrated verified data tile-drain experiments grown rotation with barley (Hordeum vulgare red clover (Trifolium pratense during 1999–2008. Long-term simulations using model were performed evaluate effects climate N fertilization for crop leaching. modeling suggests can be an effective tool similar cropping systems PEI. Both showed primarily occurred non-growing season when uptake diminishes, mineralization residual fertilizer coexists excessive moisture rainfall snowmelt infiltration. Annual average following potato, phases predicted 81, 54 35 kg ha−1, respectively, corresponding leached concentrations 15.7, 10.1 7.3 mg l−1. Increased input alone increased not only phase but also phases. To reduce risk leaching, practices should developed minimize accumulation soil both outside growing