水土保持研究2011，Vol.18Issue(6)：79-83,5.
三峡库区小江流域消落带土壤Zn各形态有效性及缓变型地球化学灾害分析
Effectiveness and Delayed Geochemical Hazard Analysis of Various Forms of Soil Zn Element in Water-level-fluctuating Zones in Xiaojiang Watershed of Three Gorges Reservoir Area
摘要
Abstract
The total content and speciation,effectiveness of Zn element in the water-level-fluctuating zones in Xiaojiang Watershed of Three Gorges Reservoir Area had been analyzed.And a study on the delayed geochemical hazard character of Zn element in regional area soil had been carried out based on the delayed geochemical hazard mathematic model.The results shows： the average amount of total content of Zn element in the study area is 123.88 mg/kg,which is higher than primary state soil environment quality standards,and which is lower than the second state soil environment quality standards.The percentage of acid soluble state,recoverable state,oxidation state,and residual state in total amount is 2.93%,4.42%,8.71% and 83.94%,available form accounted for 4.51%.Through correlation analysis,acid-soluble state,reducible state and oxidable state were closely associated with the effective state.Reducible and oxidable contents contributed greatly to the available contents.Through analyzing measured data,it was found out that Zn element has delayed geochemical hazard character in soil in water-level-fluctuating zones in Xiaojiang watershed.Zn element form transform trends can be described as release of total content to release and transform of secondary morphology.The threshold of delayed geochemical hazard is 130.67 mg/kg.About 32% of soils have the possibility to outbreak as delayed geochemical hazard.关键词
小江流域消落带/土壤/Zn元素/缓变型地球化学灾害Key words
water-level-fluctuating zones in Xiaojiang watershed/soil/Zn element/delayed geochemical hazard分类
农业科技引用本文复制引用
张婷,傅瓦利,袁波,王晓阳,蓝家程,彭景涛..三峡库区小江流域消落带土壤Zn各形态有效性及缓变型地球化学灾害分析[J].水土保持研究,2011,18(6):79-83,5.基金项目
重庆市移民局课题 （）
