Reconstruction of cropland cover using historical literature and settlement relics in farming areas of Shangjing Dao during the Liao Dynasty, China, around 1100 AD
Reconstruction of cropland cover using historical literature and settlement relics in farming areas of Shangjing Dao during the Liao Dynasty, China, around 1100 AD
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DOI：
10.1177/0959683620941293
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发表时间：
2020-08
期刊：
影响因子：
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通讯作者：
Zhilei Wu;X. Fang;Dan Jia;Wanyi Zhao
中科院分区：
文献类型：
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作者：
Zhilei Wu;X. Fang;Dan Jia;Wanyi Zhao
为了提高历史耕地数据的准确性，利用历史文献和聚落遗址，重建了辽代北方农牧交错带的耕地覆盖。首先，根据历史农户数据，以户均耕地面积为基础，重建总耕地面积。然后，将耕地面积分配到按聚落密度加权的5′网格单元中，生成耕地数据。主要研究结果如下：（1）聚落遗址数据不仅可以识别古农耕区，还可以在高分辨率网格中进行农田覆盖分配。(2)在辽代的鼎盛时期，总耕地面积为0.39 × 104平方公里。耕地网格占总网格的28.30%，耕地比例的平均值和最大值分别为6.61%和31.18%。(3)结果表明，PJ模型高估了研究区1100年的耕地面积，而海德3.2模型低估了研究区1100年的耕地面积;三个全球数据集均未揭示该研究区耕地覆盖的镶嵌空间分布格局。(4)辽代和现代的土地适宜耕种性排序基本一致，即使在生态环境脆弱的北方农牧交错带也是如此。
To improve the accuracy of historical cropland data, we reconstructed cropland cover in the northern China’s farming–pastoral zone during the Liao dynasty using historical literature and settlement relics. We first reconstructed the total cropland area using historical household data based on the cropland area per household. Next, we allocated the cropland area into 5′ grid cells weighted by settlement density to generate a cropland data. Our main findings were as follows: (1) Data on settlement relics enabled not only the identification of ancient farming areas but also the allocation of cropland cover within high resolution grids in the study area. (2) In the flourishing period of the Liao dynasty, the total cropland area was 0.39 × 104 km2. The cropland grids comprised 28.30% of the total grids, with average and maximum values of cropland fractions of 6.61% and 31.18%, respectively. (3) Compared with our result, we found that the PJ overestimate the cropland area of the study area in 1100 AD, whereas the HYDE 3.2 underestimate it. The area of anthropogenic land use in KK 10 was larger than the cropland area in this study too. None of the three global datasets revealed the mosaic spatial distribution pattern of cropland cover in this study area. (4) The orders of land suitability for cultivation during the Liao dynasty and the present period were almost the identical, even in the farming–pastoral zone of northern China, which has fragile ecological environment.