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农田土壤是大气氧化亚氮的一个重要排放源,农田氧化亚氮的排放同时受到气候环境和人为活动的复杂影响。本文基于中国华北平原的一个农田试验站的观测数据,对农业生产模拟器(APSIM)进行参数化,并检验该模型在不同时间尺度上模拟农田氧化亚氮排放的能力。结果表明,对消化系数(k_2)进行校正后,模型能够较好地模拟不同时间尺度和不同施肥处理下小麦-玉米系统的土壤氧化亚氮排放,但是对于一些较高的峰值排放模拟效果欠佳。
Farmland soils are an important source of atmospheric nitrous oxide emissions. Nitrous oxide emissions from farmland are also affected by the complex effects of climate and man-made activities. In this paper, based on the observation data of a farmland test station in the North China Plain, the agricultural production simulator (APSIM) was parameterized and the model was tested for its ability to simulate nitrous oxide emission from farmland on different time scales. The results showed that the model could simulate the soil N2O emission of wheat-maize system under different time scales and fertilization treatments well after the digestion coefficient (k 2) was corrected, but the simulation results were not good for some of the higher peak discharges .