The Imprint of Built-Up Land Expansion on Cropland Distribution and Productivity in Shandong Province

Meng Wang, Qingchen Xu, Zemeng Fan and Xiaofang Sun
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Meng Wang: School of Geography and Tourism, Qufu Normal University, Rizhao 276800, China
Qingchen Xu: School of Geography and Tourism, Qufu Normal University, Rizhao 276800, China
Zemeng Fan: State Key Laboratory of Resources and Environment Information System, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Xiaofang Sun: School of Geography and Tourism, Qufu Normal University, Rizhao 276800, China

Land, 2021, vol. 10, issue 6, 1-12

Abstract: Grain self-sufficiency is a national food security target of China. The way that built-up land expansion impacts upon cropland loss and food provision needs to be explored in the major grain producing areas. Shandong Province is an important agricultural food production region, which is also experiencing rapidly urbanizing. Here we assessed the spatiotemporal distribution of cropland loss due to built-up land expansion and landscape dynamics of cropland during 2000–2020, by using 30 m resolution land cover data. We also analyzed the potential yield change influenced by cropland loss. The results showed that the area of built-up land expanded by 5199 km 2 from 2000–2010, and 11,949 km 2 from 2010–2020. Approximately 95% of the new built-up land was from cropland during the two stages, and the primary mode of built-up land expansion was the edge expansion. The patch density and the patch size of cropland kept increasing and decreasing, respectively, and the aggregation index kept decreasing from 2000 to 2020, indicating increased cropland fragmentation. The proportion of occupied cropland with potential yield greater than 7500 kg/ha was 25% and 37% during the former and the latter period. Thus, higher quality cropland was encroached in the recent period. The findings could provide meaningful implications for making sustainable land use development strategies in the study area and other similar regions.

Keywords: urbanization; cropland loss; crop yield; landscape pattern; Shandong Province (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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