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研究目的是评估使用GIS、GPS、计算机模拟和遥感等技术降低中心旋转灌溉制下土壤NO3-N淋溶量的效果。试验发现采用精准农艺技术的生产区土壤NO3-N残留量和潜在淋溶量与其它区不同。这种差异与土壤质地呈负相关(P(0.0001),在低产沙壤区土壤残留NO3-N较低,潜在NO3-N淋溶率较高。可见,遥感等精准保护技术是一种具有降低NO3-N淋溶量提高N的使用效率潜能的管理工具。
The purpose of the study was to evaluate the effect of reducing soil NO3-N leaching with a central rotation irrigation system using techniques such as GIS, GPS, computer simulation and remote sensing. It was found that soil NO3-N content and potential leachate in the production area using precision agronomic techniques were different from other areas. The difference was negatively correlated with soil texture (P <0.0001), and the residual NO3-N was lower and the potential NO3-N leaching rate was higher in low-yielding sandy soils.It can be seen that the precise protection technique such as remote sensing is a method with reduced NO3-N leaching increases the efficiency of the use of N as a management tool.