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首页> 外文期刊>Scientific reports. >Reconstruction of the cropland cover changes in eastern China between the 10 th century and 13 th century using historical documents
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Reconstruction of the cropland cover changes in eastern China between the 10 th century and 13 th century using historical documents

机译：利用历史文献重建中国东部10世纪至13世纪的农田覆盖面积

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To evaluate and improve datasets of anthropogenic land cover change used in local and global climate models, great efforts were made to reconstruct historical land use, including the LandCover 6k project which dedicated to reconstructing human land use over the past 10,000 years. In this study, we utilized historical records, including taxed-cropland and cropland measurement areas, and data on the number of households in eastern China between the 10th century and 13th century in concert with coefficient calibration, model allocation, and per capita cropland estimation to reconstruct areas of provincial cropland for 22 provinces over five time periods. Our reconstructions indicate that total cropland areas of eastern China for AD 1000, 1066, 1078, 1162, and 1215 are 34.74?×?106?ha, 49.42?×?106?ha, 51.62?×?106?ha, 35.21?×?106?ha, and 51.21?×?106?ha, respectively. And the cropland area fluctuated because of dynasty shift and went through three phases. Cropland expansion and contraction mainly occurred in the middle and lower reaches of the Yangtze and Yellow Rivers as well as the Huaihe River Basin, while in some regions far away from battlefields, including northeastern and southern China, cropland area expanded continuously throughout the study period.
机译：为了评估和改善用于本地和全球气候模型的人为土地覆盖变化的数据集，我们付出了巨大的努力来重建历史土地用途，包括致力于过去一万年来重建人类土地用途的LandCover 6k项目。在这项研究中，我们利用了包括税收耕地和耕地测量区域在内的历史记录，以及10世纪至13世纪间中国东部家庭数量的数据世纪，结合系数校准，模型分配和人均耕地估计，在五个时间段内重建了22个省的省耕地面积。我们的重建结果表明，公元1000、1066、1078、1162和1215年中国东部的农田总面积为34.74？×？10 6 ？ha，49.42？×？10 6 ？ha，51.62？×？10 6 ？ha，35.21？×？10 6 ？ha和51.21？×？10 6 ？ha。耕地面积由于朝代的变动而波动，经历了三个阶段。农田的扩张和收缩主要发生在长江和黄河的中下游以及淮河流域，而在远离战场的一些地区，包括中国的东北和华南，农田的面积在整个研究期间不断扩大。

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