| Evaluation of land carrying capacity based on man-grain relationship——A case study of oasis in Hexi corridor |
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| DOI：10.7606/j.issn.1000-7601.2013.02.37 |
| Key Words: population grain land carrying capacity Hexi corridor |
| Author Name | Affiliation | | ZHAO Minli | College of Geography and Environmental Science, Northwest Normal University, Lanzhou, Gansu 730070, China | | LIU Puxing | College of Geography and Environmental Science, Northwest Normal University, Lanzhou, Gansu 730070, China | | ZHU Xiaojuan | College of Geography and Environmental Science, Northwest Normal University, Lanzhou, Gansu 730070, China | | HOU Chengcheng | College of Geography and Environmental Science, Northwest Normal University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| The production of grain in the oasis of Hexi corridor plays an important role in the grain supply and food security for the arid areas. From the viewpoint of man-grain relationship, the land carrying capacity
(LCC) models were used to analyze the spatial temporal dynamic patterns of land carrying capacity in the oasis of Hexi corridor from 1985 to 2009 at city and county level. The results showed that the overall land carrying capacity index (LCCI) in the oasis of Hexi corridor was 0.690～0.894 from 1985 to 2009. Except for the year of 2000 and 2001 when the land carrying capacity index was 0.875~1, it was at rich and surplus level in other years. At the city level, the change tendency of the land carrying capacity index was identical to that of the overall level from 1985 to 2009. The number of cities at grain surplus and balance level was more than that at severe overload level. At the county level, the land carrying capacity index in the oasis of Hexi corridor was basically at grain surplus level, and 55% of the counties, which were mainly distributed in the central and the eastern part of Hexi corridor, reached such a level; 5% of the counties were at balance level of man-grain relationship; while 40% of the counties were at grain deficit level, and they needed large amount of grain import. |
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