生态环境学报2018，Vol.27Issue(5)：859-865,7.DOI:10.16258/j.cnki.1674-5906.2018.05.009
云南断陷盆地高原面典型小流域土壤元素含量特征
Soil Element Contents of Typical Small Watershed in the Plateau Area of Karst Fault Basin, Yunnan
摘要
Abstract
The karst fault basin is a typical ecological fragile area in karst area of Southwest China. The geologic differentiation structure of the special basin-mountain restricts the landform evolution process of the fault basin and the spatial pattern of the water, soil, rock and plants. In order to study the total and available contents of soil major and trace elements in the plateau of the fault basin, copper (Cu), iron (Fe), manganese (Mn), zinc (Zn), calcium (Ca), magnesium (Mg), potassium (K), sodium (Na), phosphorus (P), aluminum (Al), chromium (Cr), cobalt (Co), nickel (Ni), cadmium (Cd) and lead (Pb) were studied in this paper. The results showed that, (1) The total and available contents of some elements were more discrete in more serious area of rocky dersertification, which was related to the spatial heterogeneity of the soil in the rocky desertification area. Affected by the "aggregation effect" of exposed rocks, the average values of the total and the available content of the elements in the more serious areas of rocky desertification were high. (2) The correlation between available contents of trace elements and pH, soil organic carbon (SOC) and total nitrogen (TN) respectively showed that pH value was positively related with Co and Pb while it was not significant among pH and other elements. This might follow soil elements solubility decreased with the increase of pH value, and the adsorption of elements increase with the increasing of pH value. Except Cr, the correlation between the available content of trace elements and the other 8 elements showed a significant positive correlation, this was mainly due to the trace elements and organic compounds in complex synthesis of small molecule that was a simple ion state could be directly absorbed by the plants. The results of this study can provide the basic data for clarifying the relationship between rocky desertification and geological and environmental differentiation in karst fault basin.关键词
断陷盆地/元素/微量元素/石漠化Key words
karst fault basin/elements/trace elements/rocky dersertification分类
农业科技引用本文复制引用
杨慧,朱同彬,王修华,蒲俊兵,李建鸿,张陶,曹建华..云南断陷盆地高原面典型小流域土壤元素含量特征[J].生态环境学报,2018,27(5):859-865,7.基金项目
国家重点研发专项项目(2016YFC0502500) （2016YFC0502500）
国家重点研发专项课题(2016YFC0502501) （2016YFC0502501）
国家自然科学基金项目(41571203) （41571203）
国家留学基金项目(201608450017) （201608450017）
广西科学研究与技术开发计划项目(桂科能1598023-1) （桂科能1598023-1）
