周至地区土壤有效氟及其影响因素研究  

Study on Soil Available Fluoride and its Influencing Factors in Zhouzhi Area

作　　者：甘黎明 郭娜 贺怡欣 冯博鑫 韩亚军 柳程 黄鑫 巴特尔 GAN Liming;GUO Na;HE Yixin;FENG Boxin;HAN Yajun;LIU Cheng;HUANG Xin;BA Teer(Xi'an Center of Mineral Resources Survey,China Geological Survey,Xi'an,Shaanxi 710100,China)

机构地区：[1]中国地质调查局西安矿产资源调查中心,西安710100

出　　处：《中国无机分析化学》2025年第4期523-531,共9页Chinese Journal of Inorganic Analytical Chemistry

基　　金：中国地质调查局三级项目(DD20243334);自然资源综合调查指挥中心科技创新基金资助项目(KC20220023)。

摘　　要：周至地区位于秦岭北麓的渭河冲积平原,由于特殊地理条件,土壤氟普遍较高,为了探究影响土壤有效氟的主控因素,系统采集了周至地区耕作土壤样品699件,分别用亚沸水和1 mol/L的MgCl_(2)为提取剂提取水溶态氟(Ws-F)和可交换氟(Ex-F),采用多元回归法研究土壤理化性质对土壤有效氟的影响,结果显示:1)周至地区表层土壤总氟的变化为275~1 171 mg/kg,平均值为663.5 mg/kg,64.6%的点位属于高等级,4.7%的点位属于过剩等级,超过陕西省表层土壤氟背景值的点位为88%,超过全国土壤表层氟背景的点位有90%。2)水溶态氟含量为1.24~13.92 mg/kg,平均值为7.46 mg/kg,远高于我国地氟病发生区土壤水溶态氟的平均含量2.5 mg/kg,结合总氟含量分布,认为该区域有较高的地氟病发生风险;可交换氟含量为1.50~14.11 mg/kg,平均3.73 mg/kg。3)水溶态氟与总F、pH值、S、P、Cu、CaO有较显著的正相关性,而与N、K_(2)O、SiO_(2)、Al_(2)O_(3)、有机质显示较显著的负相关关系;交换态氟与总F显示出较为显著的正相关性,与CaO、K_(2)O、MgO、Al_(2)O_(3)、pH值、Mn显示出一定的正相关关系,而与S、P、N、有机质显示出较显著的负相关关系,分析认为施用含P、S的化肥可能导致有效态氟增加。4)采用逐步回归分析法,分别构建了水溶态氟和可交换态氟的多元回归方程,分析得到土壤pH值、N、P、CaO的含量对土壤水溶性氟影响最大,而土壤总氟、pH值、S含量是影响交换性氟的主要因素。研究成果可为当地政府采取措施控制土壤有效氟提供理论基础。The Zhouzhi Area is located on the northern slope of Qinling Mountains.Soil in this area contain excess fluorine due to its special geographical conditions.In order to investigate the main controlling factors of available fluorine,699 samples were collected systematically from typical orchard soil in this area.Sub boiled water and 1 mol/L MgCl_(2) were used to extract the water soluble fluorine(Ws-F)and exchangeable fluorine(Ex-F),respectively,while,Multiple regression analysis was used to study the influence of soil physical and chemical properties.The results showed that:1)The content of topsoil fluorine in Zhouzhi area range from 275-1171 mg/kg,with the average value of 663.5 mg/kg.High-fluorine-content soils cover 64.65%of the total area.Soils with excess fluorine content accounts for 4.7%of the total area.Additionally,88%and 90%of the sampled locations exceeded the average topsoil fluorine content of Shanxi Province and the entire country,respectively.2)The water soluble fluorine content range from 1.24-13.92 mg/kg,with an average value of 7.46 mg/kg,exceeding the average value 2.5 mg/kg in where the endemic fluorosis occurred.Based on the distribution of total fluoride content,it is believed that there is a high risk of endemic fluorosis in this region;The exchangeable fluorine content range from 1.50-14.11 mg/kg,with an average value of 3.73 mg/kg.3)Water soluble fluorine was notably positively correlated with total F,pH,S,P,Cu,CaO,and was notably negatively correlated with N,K_(2)O,SiO_(2),Al_(2)O_(3) and organic matter;Exchangeable fluorine was notably positively correlated with total F,while,was slightly positively correlated with CaO,K_(2)O,MgO,Al_(2)O_(3),pH,Mn,and was notably negatively correlated with S,P,N and organic matter,Analysis suggests that the use of fertilizers containing P and S may lead to an increase in available fluoride levels.4)Multiple regression equation of water soluble fluorine and exchangeable fluorine were built by using stepwise regression,the results show that the contents of

关 键 词：周至地区 土壤氟 生物有效性 多元回归分析 

分 类 号：O657.34[理学—分析化学] O657.31[理学—化学]