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[1]LI Yunlu,CUI Wengang,LU Qingping,et al.Analysis on the Spatiotemporal Evolution of Cultivated Land Fragmentation in Mountainous Areas[J].Research of Soil and Water Conservation,2022,29(05):301-309.

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Analysis on the Spatiotemporal Evolution of Cultivated Land Fragmentation in Mountainous Areas

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 05 Page number: 301-309 Column: Public date: 2022-08-20

Title:: Analysis on the Spatiotemporal Evolution of Cultivated Land Fragmentation in Mountainous Areas

Author(s):: LI Yunlu, CUI Wengang, LU Qingping, LIU Suihua, WU Xiaopiao; (School of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, China)

Keywords:: mountainous area; fragmentation of cultivated land; temporal and spatial evolution; Guizhou Province

CLC:: F323.211

DOI:: -

Abstract:: Cultivated land is the basic resource for human survival and development. We explored the spatiotemporal evolution characteristics of cultivated land fragmentation in mountainous areas in order to provide relevant references for the rational utilization of cultivated land in mountainous areas. Taking the mountainous area of Guizhou as the research area, on the basis of obtaining the optimal analytical scale, we adopted integrated landscape index method, Fragstats 4.2 and GIS spatial analysis tool to analyze the temporal and spatial evolution characteristics of cultivated land fragmentation in mountainous areas. The results show that:(1)150 m grain size and 600 m amplitude are the best scales for analysis of farmland fragmentation in mountainous areas;(2)from 2000 to 2018, the fragmentation of cultivated land in Guizhou showed a distribution pattern of low fragmentation in the center and low fragmentation surrounding the low fragmentation; the general fragmentation and high fragmentation were widely inlaid and clustered, and the distribution pattern of gypsophila was violently broken;(3)in 19 years, the overall cultivated land in Guizhou was dominated by normal and high fragmentation; these two types of fragmentation together accounted for more than 51% of Guizhou's cultivated land area; the second was severe fragmentation and general fragmentation, which together accounted for about 32%; the area of low fragmentation was the least, ranging from 13.69% to 14.53%;(4)in terms of space, the degrees of fragmentation of cultivated land in Guiyang City, Qiandongnan Prefecture, Qiannan Prefecture, Tongren City and Liupanshui City were high, while those of Zunyi City, Bijie City, Anshun City and Qianxinan Prefecture were low;(5)from the perspective of time, the change trend of the degree of cultivated land fragmentation in each region was different; the fragmentation of cultivated land in Qiannan Prefecture and Guiyang City had decreased, while the degrees of cultivated land fragmentation in other cities(prefectures)were still increasing. To sum up, cultivated land fragmentation in mountainous areas had a certain vertical gradient differentiation. Natural geographical conditions play a fundamental role in the formation and spatial distribution of cultivated land fragmentation in mountainous areas, and human activities are the core driving force for the fragmentation of cultivated land in mountainous areas.

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Last Update: 2022-08-20