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应用土壤-作物系统模型模拟分析了内蒙古阿拉善地区不同水肥管理模式(传统和改进)下的土壤水分动态、氮素淋失以及春玉米生长过程。结果表明,当前农民传统水肥管理的水分渗漏量和氮素淋失量非常大,分别达到了303mm和179kg N/hm~2,而改进处理的水分渗漏量和氮素淋失量约是传统处理的一半。两种管理模式的水分利用效率差别不大,而氮素利用效率差异较大,分别为25.3和32.5kg/(kg N),改进模式要明显好于传统模式。
The soil-crop system model was used to simulate and analyze the soil moisture dynamics, nitrogen leaching and the growth of spring maize under different water and fertilizer management models (traditional and improved) in Alashan, Inner Mongolia. The results showed that the amount of water leakage and nitrogen leaching of traditional water and fertilizer management were very large, reaching 303mm and 179kg N / hm ~ 2, respectively, while the amount of water leakage and nitrogen leaching Half of the traditional treatment. There was little difference in water use efficiency between the two management modes, but the nitrogen use efficiency varied widely, which were 25.3 and 32.5 kg / (kg N), respectively. The improved model was obviously better than the traditional model.