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[1]ZENG Weijun,ZHANG Jiansheng,LIU Shuxia,et al.Research on the Spatial Distribution Characteristics of Arable Land Natural Quality Grade of Watersheds in Yunnan Province[J].Research of Soil and Water Conservation,2016,23(05):267-273.

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Research on the Spatial Distribution Characteristics of Arable Land Natural Quality Grade of Watersheds in Yunnan Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 05 Page number: 267-273 Column: Public date: 2016-10-28

Title:: Research on the Spatial Distribution Characteristics of Arable Land Natural Quality Grade of Watersheds in Yunnan Province

Author(s):: ZENG Weijun^1,2, ZHANG Jiansheng^1,2, LIU Shuxia^1,2, LI Chengxue³, GE Xingyan¹, CHEN Yunchun², LI Jianhua^1,2, YU Jianxin^1,2; 1. Engineering Research Center of Science and Technology of Land and Resources, Yunnan Agricultural University, Kunming 650201, China;
2. College of Water Conservancy, Yunnan Agricultural University, Kunming 650201, China;
3. College of Resources and Environment, Yunnan Agricultural University, Kunming 650201, China

Keywords:: cultivated land; natural quality grade; distribution; six watersheds; Yunnan Province

CLC:: F301.21

DOI:: -

Abstract:: It is of primary importance to understand the conditions of the natural quality of the cultivated land, and its quantity, quality and spatial distribution for the reasonable utilization of the arable land resources. The natural quality grades of the arable land in Yunnan Province and their spatial distribution characteristics are analyzed based on the grading data of 129 counties and the watershed distribution in the province. The results showed that: (1) the average natural quality grade of the arable land for the whole province follows the positive skewed distribution, such as 6 to 11 account for as high as 67.69%, its distribution in the Irrawaddy watershed takes a wavy shape, going ups and downs; it is in a positive skewed distribution in the other watersheds; (2) the average natural quality grade, being grade 9.8, of the arable land for the whole province is at the medium to lower level the highest average natural quality grade of 12.7 occurs in the Irrawaddy Watershed, while the lowest of 6.0 is in the Jinshajiang Watershed, the average natural quality grade of the good-quality arable land is the highest (grade 24.1), and the low-quality arable land has the lowest average grade of 6.0, the development of the average quality of the arable land for the six big watersheds has little difference from the average natural quality grade of the whole province； (3) the cultivated land in Yunnan Province is mainly in the medium， or low-quality, accounting for 88.29% of the area, and is mostly found in the Jinshajiang Watershed, which is followed by the Nujiang Watershed. The cultivated land in the Red River and Nanpanjiang Watersheds is the medium-quality. The good-quality arable land mainly distributs in the Jinshajiang Watershed, accounting for 76.38% of its total area, but only 0.81% of the whole province. Except that the Irrawaddy Watershed is higher, the high-quality land evenly distributs in the other five watersheds.

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