不同施肥方式对玉米种植区氮、磷流失的影响OA

Investigating the loss patterns of nitrogen and phosphorus under different fertilization treatments in the summer maize plant-ing system in the Tai'an area of Shandong can provide a basis and technical reference for non-point source pollution prevention and control in the region's farmland.The experiment employed three fertilization treatments:local farmers'conventional fertilization,main factor optimization fertilization,and comprehensive optimization fertilization,using natural rainfall field observation methods to analyze the effects of different fertilization treatments on nitrogen and phosphorus loss in runoff and leachate in maize planting in the Tai'an area of Shandong.The results indicated that surface runoff was closely related to rainfall.Compared with conventional and main factor optimization treatments,the comprehensive optimization treatment reduced runoff volume,with a 20.75%decreased in runoff volume during the monitoring period.Nitrogen existed in a soluble form in both runoff and leachate,with higher nitrogen and phosphorus con-centrations in leachate than in runoff.Generally,the order of the average concentrations for total nitrogen,nitrate nitrogen,ammonium nitrogen,and total phosphorus in runoff and leachate was observed as follows:conventional treatment had the highest concentrations,followed by main factor optimization treatment,and the lowest concentrations were found in comprehensive optimization treatment.The main factor optimization treatment reduced total nitrogen concentration in runoff by 38.58%and total phosphorus concentration by 46.88%,while in leachate,total nitrogen concentration decreased by 26%,and total phosphorus concentration decreased by 73.07%.The study demonstrated that comprehensive optimization treatment was an ideal fertilization method to prevent nitrogen and phospho-rus loss in summer farmland and ensured crop yield in the experimental area.