大巴山区土壤中的硒和氟  

DISTRIBUTION OF SELENIUM AND FLUORINE IN SOILS OF DABA MOUNTAINS

作　　者：李永华[1] 王五一[1] 雒昆利[1] 杨林生[1] 

机构地区：[1]中国科学院地理科学与资源研究所,北京100101

出　　处：《土壤学报》2004年第1期61-67,共7页Acta Pedologica Sinica

基　　金：国家自然科学基金 ( 40 1 71 0 0 6 );中国科学院王宽诚博士后基金;中国博士后基金资助

摘　　要：以大巴山区典型早古生代地层上发育的自然土壤为对象 ,研究了大巴山区土壤中Se、F等生命元素的含量及分布规律。结果表明 :大巴山区土壤中硒、氟的平均含量分别为 6 65± 14 2 5μgg- 1和 670±451μgg- 1,远高于对照和中国土壤背景值 ;富Zn贫Fe的土壤环境有利于Se、F的富集 ;土壤中硒、氟的含量受地层分布、母岩岩性等因素的控制 ,同时 ,表生地球化学作用、生物作用以及山地剥蚀地貌也影响它们在土壤中的重新分配。In this work, typical soil profiles developed from early Paleozoic str atum in Daba Mountains were selected as our investigative objects. The concentr a tions and distributions of Se and F in those soils were studied. It was found t h at the concentrations of Se and F in soil of Daba Mountains were far higher than those in control soils and those of background value in Chinese soils. The ave r age Se and F concentrations in Daba Mountains soils are 6.65±14.25 μg g - 1 and 67 0±451 μg g -1 , respectively. Zn in abundance and Fe deficiency help to e nrichmen t of Se and F in the soils. Se and F concentrations in soils are governed by th e distribution of stratum and the lithology of parent rock. Otherwise, environme n tal geochemical processes, biologic processes and denudation physiognomy also pr ofoundly affect the redistribution of them in soils.

关 键 词：大巴山区 土壤 硒 氟 分布规律 含量 环境条件 

分 类 号：S153.61[农业科学—土壤学]