摘要
本文调查了河南省洛阳市土壤硒资源,分析了洛阳市不同地质背景、土壤类型、土地利用方式、酸碱性及有机质土壤中全硒含量分布特征,测定了土壤中硒的有效性及化学形态分布。结果显示,洛阳市土壤全硒含量范围介于(0.03-5.67)×10^(-6),平均值为0.30×10^(-6),适量和高硒土壤面积占研究区的94.73%;区内蓟县系云梦山组土壤硒平均含量最高,寒武系辛集组土壤硒平均含量最低;砂姜黑土中全硒平均含量最高,而水稻土全硒平均含量最低;不同土地利用方式中,水田和有林地土壤中全硒平均含量较高;土壤酸性和有机质含量高的条件下有利于硒的富集;不同类型土壤中,潮土中有效态硒的平均含量最高,红黏土中有效态硒的平均含量最低;碱性土壤中有效硒平均含量高于中性和酸性土壤;土壤中硒主要以残渣态、强有机结合态和腐殖酸结合态存在,碱性土壤和红黏土中生物可利用态硒的平均含量最高。洛阳市土壤硒资源具有较大利用潜力,可依据研究区域全硒含量分布特征开展具有针对性的富硒产业发展规划。
Targeting the selenium resource in soils of Luoyang City,Henan Province,this study analyzed the distribution of total sele-nium concentration under different geological settings,soil types,land use types,acidity and alkalinity,and organic matter.Further-more,it determined the bioavailability and speciation distribution of selenium in the soils.The results indicate that:(1)The soils in Luoyang City have total selenium concentrations of(0.03-5.67)×10^(-6),with an average of 0.30×10^(-6),and the area of soils with moderate and rich selenium accounts for 94.73%;(2)The average selenium concentration is the highest in soils of the Jixian Yun-mengshan formation and the lowest in soils of the Cambrian Xinji Formation;(3)The average total selenium concentration is the high-est in lime concretion black soil and the lowest in paddy soil;(4)Regarding land use types,the average total selenium concentration is relatively high in soils of paddy land and woodland;(5)Soils with high acidity and high organic matter concentrations are favorable for selenium enrichment;(6)In terms of soil types,the average concentration of bioavailable selenium is the highest in fluvo-aquic soils and the lowest in red clays;(7)The average concentration of bioavailable selenium is higher in alkaline soils than in neutral and acidic soils;(8)Selenium in soils primarily occurs in residue,strong organic bound,and humic acidic bound forms,with the highest average concentration of bioavailable selenium occurring in alkaline soils and red clays.The selenium resource in the soils in Luoyang City has high utilization potential,and it is feasible to conduct targeted development and planning of the selenium-rich industry accord-ing to the distribution of total selenium concentration in the study area.
作者
田强国
侯进凯
杨在伟
李立园
TIAN Qiang-Guo;HOU Jin-Kai;YANG Zai-Wei;LI Li-Yuan(Institute of Geology and Mineral Resources Survey,Henan Bureau of Geology and Mineral Development,Luoyang471023,China;School of Envi-ronment and Natural Resources,Zhejiang University of Science and Technology,Hangzhou310023,China;Key Laboratory of Recycling and Eco-Treatment of Waste Biomass of Zhejiang Province,Hangzhou310023,China)
出处
《物探与化探》
CAS
北大核心
2023年第5期1371-1378,共8页
Geophysical and Geochemical Exploration
基金
洛阳市自然资源和规划局洛阳市硒资源详查项目(洛公交易采购[2018]053号)。
关键词
土壤
硒
有效性
化学形态
soil
selenium
bioavailability
speciation
