Based on land rocky desertification and land use data in 2004(scale: 1:50000),the land use types distribution in different rock types and occurrence ratio of rocky desertification in different land use types at Zhudong,Hongguo and Baoji rocky desertification landscapes which are located in Panxian County,Guizhou Province,were studied quantitatively.Results indicate that slight rocky desertification land is distributed in shrub land mainly,and the rocky desertification in sloping cropland accounts for 11.67% of it;moderate rocky desertification is distributed in moderate coverage grass slopes mainly,intense rocky desertification is distributed in rocky dry-land which is difficult to use,showing that the slight and moderate rocky desertification were resulted from artificial causes,intense and very intense rocky desertification were induced by both of artificial causes and bad natural factors probably in Zhudong area.The slight and moderate rocky desertification lands were resulted from anthropogenic factors and the intense and very intense rocky desertification by natural factors at Baoji area.The natural conditions in Hongguo are superior than other two districts,so the occurrence of rocky desertification,particularly the intense rocky desertification were induced by intense land use,for example,there were moderate and very intense rocky desertification in sloping cropland.Rehabilitation measures correlated highly with different formation causes of karst rocky desertified lands,it was necessary to take the land use genesis types and its spatial difference into consider when design the control emphasis and rehabilitation models.
LI Yang-Bing, SHAO Jing-An, ZHOU Guo-Fu, LONG Jian
. Genesis Difference of Rocky Desertification in Karst Mountains——A Case Study of Panxian County,Guizhou Province[J]. SCIENTIA GEOGRAPHICA SINICA, 2007
, 27(6)
: 785
-790
.
DOI: 10.13249/j.cnki.sgs.2007.06.785
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