Research on the identification of cultivated land quality key elements in Changsha-Liuyang-Pingjiang Hilly Region at multi-scale

doi:10.14088/j.cnki.issn0439-8114.2023.03.002

Abstract

Abstract: In order to further protect and improve the comprehensive quality of cultivated land and identify the key elements of cultivated land quality, the Changsha-Liuyang-Pingjiang hilly area was selected as the research area, and the geographic grid and spatial autocorrelation analysis method were used to delineate the three-level research scale with the characteristic scale of 60 km. The spatial correlation degree and change law of various components of cultivated land quality at different scales had been evaluated and revealed. The results showed that all the elements of cultivated land quality showed positive spatial correlations. Among them, the three elements of irrigation guarantee rate, organic matter content, and cultivated layer texture were the key elements that affect the quality of cultivated land, no matter what scale they were based on. In addition, the degree of concentration and fragmentation of cultivated land were shown as key elements of cultivated land quality on the second and third scales; the background quality of cultivated land contributed the most to the overall quality of cultivated land, followed by spatial and ecological quality; as the observation scale increased, the Moran's I index value of each element of the spatial and background quality increased immediately, while the Moran's I index of the ecological quality element decreased as the scale became larger.

Key words: cultivated land quality, key elements, geographic grid, spatial autocorrelation, multi-scale

CLC Number:

F301.2

HOU Lei, DUAN Jian-nan, LI Ping. Research on the identification of cultivated land quality key elements in Changsha-Liuyang-Pingjiang Hilly Region at multi-scale[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(3): 8-15.

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