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Arid Land Geography >

2023 , Vol. 46 >Issue 5: 793 - 803

DOI: https://doi.org/10.12118/j.issn.1000-6060.2022.393

Land Use and Agricultural Development

Spatiotemporal variation and evaluation of cultivated land quality grade in arid areas: A case of Xining City

  • Xue PAN ,
  • Yuqi GUAN ,
  • Zhandong PAN ,
  • Jie LIU ,
  • Liqun CAI ,
  • Bo DONG ,
  • Jian DU
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  • 1. Heilongjiang Institute of Black Soil Conservation and Utilization, Harbin 150000, Heilongjiang, China
    2. College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, Gansu, China
    3. Institute of Dryland Agriculture, Gansu Academy of Agricultural Sciences, Lanzhou 730070, Gansu, China

Received date: 2022-08-11

  Revised date: 2022-11-07

  Online published: 2023-06-05

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Abstract

Taking Xining City of Qinghai Province, China, as the research object, based on the quality grade of arable land (GB/T33469-2016), the Delphi method, hierarchical analysis, and fuzzy mathematics were used to construct the evaluation index system of arable land quality in Xining City. Combined with geographic information system software technology, the quality of arable land in Xining City in 2015 and 2018 was evaluated, the spatial and temporal distribution of arable land quality and soil nutrient characteristics in Xining City were analyzed, and the current situation of arable land quality in Xining was explored. The results showed the following: (1) The average arable land quality grades in 2015 and 2018 were 6.74 and 6.33, respectively, with an improvement of 0.41 between 4 a. The overall improvement of arable land quality grades mainly came from the grades third, fourth, fifth, and seventh, whose total area of high and medium grades increased by 1.49% in 2018 compared with 2015. (2) Regarding 4 a between the quality level of arable land in the spatial distribution of large differences, high and medium lands are mainly concentrated in the central Huanzhong District and the northern Datong County, low land is mainly distributed in the edge by the mountains and higher altitude areas, and the quality of arable land improved mainly from Datong County, Huangyuan County, and Huanzhong District. (3) Compared with 2015, the content of soil organic matter, available phosphorus, and rapidly available potassium increased in 2018, among which the evaluation grade of available phosphorus content increased. This study performed a comprehensive evaluation of the quality of arable land in the whole area of Xining City, and the results can well reflect the current quality of arable land in the area and have guiding significance for agricultural production.

Key words： cultivated land quality; change of rank; spatial distribution; geographic information system (GIS); Xining City

Cite this article

Xue PAN , Yuqi GUAN , Zhandong PAN , Jie LIU , Liqun CAI , Bo DONG , Jian DU . Spatiotemporal variation and evaluation of cultivated land quality grade in arid areas: A case of Xining City[J]. Arid Land Geography, 2023 , 46(5) : 793 -803 . DOI: 10.12118/j.issn.1000-6060.2022.393

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