区域模型在黄土高原丘陵区尺度转换研究中的应用

针对黄土高原的土地可持续利用研究方法中的尺度转换研究需要,利用较为先进的土地情景利用规划思路与土壤侵蚀与生产力测算模型APEX(AgriculturalPolicy/EnvironmentaleXtender),对于黄土高原区域综合治理典型面积为8.27km2的纸坊沟流域土地利用结构进行了模拟计算。结果表明,模型模拟计算的水土流失量与实际观测量的误差小于10%,5年加权平均的作物模拟产量与实测值的差异不显著。据此计算了55km2县南沟不同轮作方式、不同耕作措施等生产设计所产生的不同结果,并经由计算结果做出比较分析。

Use of the regional models to the yardstick-conversion research aimed at the hilly and gully regions of the Loess Plateau

In terms of the yardstick-conversion requirements of the research methods for sustainable land use in the loess plateau, the planning idea of the advance condition land use and the APEX(agricultural policy / environmental extender), an estimation models of land productivity, were adopted to simulate the land use of Zhifanggou catchments, a model in the comprehensive catchments control of the loess plateau, which covered 8.27 km~2. The results showed that the soil loss computed with the simulation and the actual soil loss differed by less than 10% and the annual weighed crop yield obtained with the simulation did not significantly differ from the actual crop yield. According to these results, the effects of different rotation modes, different cultivation modes on crop production were estimated and analyzed.