[1]YANG Yuanzhi,CHEN Yunchun,LIAO Lijun,et al.Characteristics of Spatial Distribution of Arable Land Grade in Southwest China[J].Research of Soil and Water Conservation,2020,27(06):226-232.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 06
Page number:
226-232
Column:
目次
Public date:
2020-10-20
- Title:
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Characteristics of Spatial Distribution of Arable Land Grade in Southwest China
- Author(s):
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YANG Yuanzhi1,2, CHEN Yunchun3, LIAO Lijun3, ZENG Weijun3, LIU Weijia2, XIANG Donglei1,3, LI Jianhua3
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(1.Engineering Research Center of Science and Technology of Land and Resources, Yunnan Agricultural University, Kunming 605201, China; 2.College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China; 3.College of Water Resources, Yunnan Agricultural University, Kunming 605201, China)
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- Keywords:
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land use; quality of arable land; spatial distribution; southwest region; local autocorrelation
- CLC:
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F301.21
- DOI:
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- Abstract:
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In order to meet the demand of arable land quality management, based on the annual updated data of 5 provinces in southwest China, we analyzed the characteristics of spatial distribution of arable land in southwest China by using the area weighted average method, ArcGIS spatial autocorrelation method and mathematical statistics. The results show that:(1)the average grades of arable land in southwest China are 9.85, 9.86 and 9.80, respectively, and the arable land quality as a whole is medium and low;(2)there are significant differences in arable lands in the southwest region; the average grade of the three indicators in Guangxi Autonomous region is below 8.5; the highest utilization rate in Sichuan Province is 8.25; the average level of the three types of indicators in Chongqing City is between 9 and 10, 10—11 for Yunnan Province; the land quality in Guizhou Province was worst with an average of 11—12;(3)the distribution characteristics of the three types of intercity were matched with the autocorrelation analysis results, which were mostly clustered together in contiguous patches and clusters; as a whole, the arable land with high quality concentrated in the cities of Jiangnan region and south China region; the average distribution tended to be within 7—8 and 8—9, matching the LL type of the autocorrelation spatial distribution; however, the arable land with poor quality mainly distributed in Hengduanshan Mountain area and the cities of the Yunnan-Guizhou Plateau area, matching with HH type; negative correlation types LH and HL had no obvious concentration region. This research can provide scientific basis for the unified planning of arable land, the protection of permanent basic farmland and the balanced management of arable land occupation and compensation.