Impact of cropland displacement on the potential crop production in China: a multi-scale analysis

文献类型： 外文期刊

第一作者： Yang, Bohan

作者： Yang, Bohan;Yang, Bohan;van Vliet, Jasper;Verburg, Peter H.;Ke, Xinli;Zhou, Ting;Yu, Qiangyi;Zhou, Ting;Verburg, Peter H.

作者机构：

关键词： Land use change; Cropland displacement; Potential crop production; Land use policy; Food security

期刊名称：REGIONAL ENVIRONMENTAL CHANGE （ 影响因子：3.678； 五年影响因子：4.135 ）

ISSN： 1436-3798

年卷期： 2020 年 20 卷 3 期

页码：

收录情况： SCI

摘要： Changes in the amount and location of cropland areas may affect the potential crop production at different spatial scales. However, most studies ignore the impacts of cropland displacement on potential crop production. In many countries, cropland protection policies mainly aim for no loss in cropland area, while there is no restriction on change of cropland location. Taking China as the study area, we analyze the impacts of cropland displacement on potential crop production at four administrative levels during the period 2000 and 2018. At the national level, we find a net decrease in cropland area of 0.81 Mha, while another 19.63 Mha was displaced. The former led to a decrease of 4.20 Mton in potential crop production, while the latter resulted in a decrease of 43.26 Mton as a result of lower quality of the newly cultivated lands. In other words, cropland displacement explains 91% of the total loss in potential crop production at the national scale. However, the contribution of cropland displacement to total change in potential crop production is increasingly smaller at provincial level, municipal level, and county levels. These findings highlight the importance of geographic location on crop production and suggest that cropland policies should consider geographic location in addition to cropland area.

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