1Aragonite stalagmite use in paleoclimate and environmental change research：Progress,disadvantages and further research directionsYINJian-jun, LINYu-shi, TANG Wei387-3952Element geochemical characteristics of red weathering crust from dolomite,north Guizhou,ChinaLI Rui, GAO Jie, ZHANG Li, LI Jin-jin, JI Hong-bing396-4043The effects of using N-fertilizers in soil on karst carbon sink in karst systemHUANG Fen, XIAO Qiong, YINWei-lu, HU Gang, YANG Li-chao, LIU Zhi-ling, CAO Jian-hua405-4114Analysis of characteristics and genesis of maj or ions in river water using multivariate statistical analysis:A case study of areas controlled by Wuzhou hydrological stationHUANG Jie, YU Shi, LIANG Quan412-4185Research advances on multi-medium flow model for karst aquifersYANG Yang, TANG Jian-sheng, SU Chun-tian, PANXiao-dong, ZHAO Liang-jie419-4246Study on the evolutionary process of sulfate concentration in Ordovician karst water after coal mining in Fengfeng mineHAO Chun-ming, HE Pei-yong, WANG Yi, HOU Shuang-lin, DONG Jian-fang425-4317Characteristics of the Longj ian spring karst water systemWANG Xian-guo, QIU Jin-bo, GE Yan432-4408Study on the features of vegetation in different landforms of peak forest plain in the north GuangdongWEI Xing-hu, XU Xi-zhen, LEI Li, ZHOU Hong-yan441-4489Characteristics of bryophytes with gemmae from a karst bauxite mine：A case study of Lindai mine in Zhanj ie town,Qingzhen,GuizhouYIN Sheng-feng, WANG Zhi-Hui, ZHANG Zhao-Hui449-45510Current status and treatment of rocky desertification in key eastern areas of the Nandong subterranean river systemQIN Xing-ming, JIANG Zhong-cheng, HE Bing-hui, LAO Wen-ke, LI Yan-qing, ZHAO Yi, LANFu-ning456-46311Rocky desertification control issues in the context of priority for ecological function in karst areas of southwest ChinaZHANG Jun-yi, DAI Ming-hong, WANG La-chun, SU Wei-ci464-47212Estimating soil erosion and analyzing its spatio-temporal characteristics in Guij iang river basin,GuangxiCHEN Ping, LIAN Yan-qing, JIANG Zhong-cheng, QINXiao-qun473-48213Evaluation and trend analysis of tourism ecological security in karst areas:A case study for GuangxiZHANG Peng, QIU Ping483-48914Distribution characteristics and factors influencing karst collapse in Dachengqiao,Ningxiang,HunanCHENLiang-jing, SUNXi-liang, PI Jing, WANG Can, OU Jian490-49715Application of high-resolution online tracer technique in distinguishing the contaminant source of water resources in karst area：A case study of Yuquankan spring in Qianj iang county,ChongqingYU Zheng-liang, YANG Ping-heng, GU Hai-hua, FANG Ming-yang, LI Jian-hong, CHENJin-long498-50316Characteristics and source of microbial contamination of groundwater in Laolongdong basinDUANYi-fan, HE Qiu-fang, LIU Zi-qi, ZHANG Yuan-zhu, ZHANG Hong, ZHAO Rui-yi504-511 