YANG Jiuchun, ZHANG Shuwen, LI Ying, BU Kun, ZHANG Yubo, CHANG Liping, ZHANG Yangzhen. Dynamics of Saline-alkali Land and Its Ecological Regionalization in Western Songnen Plain, China[J]. Chinese Geographical Science, 2010, 20(2): 159-166. doi: 10.1007/s11769-010-0159-0
Citation: YANG Jiuchun, ZHANG Shuwen, LI Ying, BU Kun, ZHANG Yubo, CHANG Liping, ZHANG Yangzhen. Dynamics of Saline-alkali Land and Its Ecological Regionalization in Western Songnen Plain, China[J]. Chinese Geographical Science, 2010, 20(2): 159-166. doi: 10.1007/s11769-010-0159-0

Dynamics of Saline-alkali Land and Its Ecological Regionalization in Western Songnen Plain, China

doi: 10.1007/s11769-010-0159-0
Funds:  Under the auspices of National Natural Science Foundation of China (No. 40771162);Key Item of Knowledge Innova-tion Programs of Chinese Academy of Sciences (No.KZCX2-SW-320-1)
  • Received Date: 2009-08-10
  • Rev Recd Date: 2009-12-07
  • Publish Date: 2010-01-22
  • As the important reserve land resources for food production,saline-alkali land should play a significant role to ensure the national food security in the context of global food crisis. The western Songnen Plain is one of main distribution regions of saline-alkali land in China,with great potential in agricultural development. In this study,the extent,transformation,spatial distribution and temporal change of saline-alkali land in the western Songnen Plain during 1954-2005 were investigated by using remote sensing and GIS spatial analysis methods. Saline-alkali land change was detected from a temporal series of topographic maps in 1954,satellite images of Landsat MSS in 1976,Landsat TM/ETM in 1988,2000 and 2005 through artificial visual interpretation. The results indicated a significant expansion in saline-alkali land area and aggravation in salinization. The area of saline-alkali land had increased from 401.48×103 ha in 1954 to 1 097.45×103 ha in 2005. While the ratio of light,moderate and serious salinized land areas changed from 6.72:2.92:1.00 to 1.25:1.06:1.00 in the study period. Grassland,cropland,swampland and water body were the major land use and land cover types from which saline-alkali land transformed. And the secondary salinization occured mainly in Da'an City,Tongyu County,Changling County,Daqing City,Dorbod Mongolian Autonomous County and Zhaoyuan County. Finally,seven large ecoregions and 14 corresponding sub-ecoregions were delineated out based on spatio-temopral dynamic characteristics of saline-alkali land and geo-relational environmental attributes. According to the results,measures of amelioration and ways of development of saline-alkali land in the western Songnen Plain were put forward.
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Dynamics of Saline-alkali Land and Its Ecological Regionalization in Western Songnen Plain, China

doi: 10.1007/s11769-010-0159-0
Funds:  Under the auspices of National Natural Science Foundation of China (No. 40771162);Key Item of Knowledge Innova-tion Programs of Chinese Academy of Sciences (No.KZCX2-SW-320-1)

Abstract: As the important reserve land resources for food production,saline-alkali land should play a significant role to ensure the national food security in the context of global food crisis. The western Songnen Plain is one of main distribution regions of saline-alkali land in China,with great potential in agricultural development. In this study,the extent,transformation,spatial distribution and temporal change of saline-alkali land in the western Songnen Plain during 1954-2005 were investigated by using remote sensing and GIS spatial analysis methods. Saline-alkali land change was detected from a temporal series of topographic maps in 1954,satellite images of Landsat MSS in 1976,Landsat TM/ETM in 1988,2000 and 2005 through artificial visual interpretation. The results indicated a significant expansion in saline-alkali land area and aggravation in salinization. The area of saline-alkali land had increased from 401.48×103 ha in 1954 to 1 097.45×103 ha in 2005. While the ratio of light,moderate and serious salinized land areas changed from 6.72:2.92:1.00 to 1.25:1.06:1.00 in the study period. Grassland,cropland,swampland and water body were the major land use and land cover types from which saline-alkali land transformed. And the secondary salinization occured mainly in Da'an City,Tongyu County,Changling County,Daqing City,Dorbod Mongolian Autonomous County and Zhaoyuan County. Finally,seven large ecoregions and 14 corresponding sub-ecoregions were delineated out based on spatio-temopral dynamic characteristics of saline-alkali land and geo-relational environmental attributes. According to the results,measures of amelioration and ways of development of saline-alkali land in the western Songnen Plain were put forward.

YANG Jiuchun, ZHANG Shuwen, LI Ying, BU Kun, ZHANG Yubo, CHANG Liping, ZHANG Yangzhen. Dynamics of Saline-alkali Land and Its Ecological Regionalization in Western Songnen Plain, China[J]. Chinese Geographical Science, 2010, 20(2): 159-166. doi: 10.1007/s11769-010-0159-0
Citation: YANG Jiuchun, ZHANG Shuwen, LI Ying, BU Kun, ZHANG Yubo, CHANG Liping, ZHANG Yangzhen. Dynamics of Saline-alkali Land and Its Ecological Regionalization in Western Songnen Plain, China[J]. Chinese Geographical Science, 2010, 20(2): 159-166. doi: 10.1007/s11769-010-0159-0
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