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The changing patterns of cropland conversion to built-up land in China from 1987 to 2010

文献类型： 外文期刊

作者： Ju Hongrun 1 ; Zhang Zengxiang 1 ; Zhao Xiaoli 1 ; Wang Xiao 1 ; Wu Wenbin 5 ; Yi Ling 1 ; Wen Qingke 1 ; Liu Fang 1 ; Xu Ji 1 ;

作者机构： 1.Chinese Acad Sci, Inst Remote Sensing & Digital Earth, Beijing 100101, Peoples R China

2.Qingdao Univ, Sch Tourism & Geog Sci, Qingdao 266071, Shandong, Peoples R China

3.Univ Calif Santa Barbara, Dept Geog, Santa Barbara, CA 93106 USA

4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

5.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr, Key Lab Agri Informat, Beijing 100081, Peoples R China

关键词： cropland loss; urban growth; rural settlement; industrial land; transportation land; China

期刊名称：JOURNAL OF GEOGRAPHICAL SCIENCES （ 影响因子：3.534； 五年影响因子：3.647 ）

ISSN： 1009-637X

年卷期： 2018 年 28 卷 11 期

页码：

收录情况： SCI

摘要： Over the past few decades, built-up land in China has increasingly expanded with rapid urbanization, industrialization and rural settlements construction. The expansions encroached upon a large amount of cropland, placing great challenges on national food security. Although the impacts of urban expansion on cropland have been intensively illustrated, few attentions have been paid to differentiating the effects of growing urban areas, rural settlements, and industrial/transportation land. To fill this gap and offer comprehensive implications on framing policies for cropland protection, this study investigates and compares the spatio- temporal patterns of cropland conversion to urban areas, rural settlements, and industrial/ transportation land from 1987 to 2010, based on land use maps interpreted from remote sensing imagery. Five indicators were developed to analyze the impacts of built-up land expansion on cropland in China. We find that 42,822 km(2) of cropland were converted into built-up land in China, accounting for 43.8% of total cropland loss during 1987-2010. Urban growth showed a greater impact on cropland loss than the expansion of rural settlements and the expansion of industrial/transportation land after 2000. The contribution of rural settlement expansion decreased; however, rural settlement saw the highest percentage of traditional cropland loss which is generally in high quality. The contribution of industrial/transportation land expansion increased dramatically and was mainly distributed in major food production regions. These changes were closely related to the economic restructuring, urban-rural transformation and government policies in China. Future cropland conservation should focus on not only finding a reasonable urbanization mode, but also solving the "hollowing village" problem and balancing the industrial transformations.

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