热带农业工程2025，Vol.49Issue(6)：39-42,4.
海南农用地土壤重金属背景值阈值研究
Research on the Background Value Thresholds of Heavy Metals in Agricultural Soils in Hainan
摘要
Abstract
The threshold values of heavy metals in agricultural soil are key criteria for formulating policies on agricultural development,environmental protection,and soil remediation.As China's only tropical island province,Hainan's heavy metal contamination status of soil resources has profound impacts on ecological balance,agricultural product safety,and sustainable agricultural development.This paper systematically analyzes the background values and pollution assessment of soil heavy metals(Cd,Pb,As,Ni,Cu,Zn,Cr,Hg)in Hainan soils since the"Seventh Five-year Plan"period identifies the main ranges of the background values of each heavy metal,and finds significant discrepancies among different studies.The background values of Cd,As,and Hg varied most considerable,with differences up to 11-15 times;those of Ni,Cu,and Cr differed by approximately 5 times;while variations for Pb and Zn were relatively small.Moreover,due to differences in soil types,results also diverged even under the same standards.The highest background values of Cd and Hg are close to the"Soil Environmental Quality Risk Control Standard for Soil Contamination of Agricultural Land"(GB 15618-2018),and should therefore be used cautiously as reference background values.These findings provide a scientific basis for soil pollution control and environmental remediation in tropical regions of China,and will help realize the safety of agricultural products and promote the development of characteristic agriculture.关键词
土壤/重金属/背景值/阈值/海南岛Key words
soil/heavy metals/background values/threshold values/Hainan Island分类
资源环境引用本文复制引用
尚二萍,马勇,姚武韬,仉淑艳..海南农用地土壤重金属背景值阈值研究[J].热带农业工程,2025,49(6):39-42,4.基金项目
海南省自然科学基金(No.520QN295). （No.520QN295）
