Estimating deep drainage and nitrate leaching from the root zone under sugarcane using APSIM-SWIM

摘要: Abstract The Burdekin Delta (BD) is located on the dry-tropical coastal strip in North Queensland, Australia. It one of Australia's premier sugar producing districts with approximately 40,000 ha land under sugarcane. Because BD borders Great Barrier Reef World Heritage Area (GBRWHA), industry, community, regulatory, and environmental organisations are interested ascertaining magnitude deep drainage nitrate leaching from root zone potential implications for GBRWHA. Direct measurement difficult, modelling likely to play an ever-increasing role guiding experimental work decision-making. Here, we describe collection nitrate-leaching related data collected over two cropping seasons at a specific field site within its use calibration application model created Agricultural Production Systems Simulator (APSIM) framework constituent crop-growth, soil–water, nitrogen transformation modules (Sugar, APSIM-SWIM, Soiln2). Model indicated that simulated amount leached season compared favourably derived inferred observed soil–water concentrations. Subsequent investigation fertilizer management options using identified timing both irrigation as key parameters which control might be exploited minimise flux groundwater.