Abstract：
This study aimed to investigate the distribution and migration characteristics of lead (Pb) and zinc (Zn) in paddy soils in Hunan Province, China. A total of 343 soil samples from 63 profiles were collected from typical regions. The concentration, spatial distribution, and migration behaviors of Pb and Zn in the paddy soils were examined. The results showed that (1) the concentration ranges of Pb and Zn in the surface layer were 17.62-114.07 mg/kg and 44.98-146.84 mg/kg, respectively. (2) The content was higher in the middle and lower reaches of the Xiangjiang River basin horizontally and exhibited shallow enrichment characteristics vertically. (3) Pb migration was weaker than Zn migration, and the parent material had the most significant influence on Pb and Zn content in the bottom soil layer. The research results will clarify the characteristics of Pb and Zn contents in paddy soils in Hunan Province, further understand the horizontal distribution and vertical migration and transformation characteristics of Pb and Zn contents in paddy soils, and provide basic data for scientific rice cultivation and safe food production.
摘要：
本研究旨在探讨湖南省水稻土中铅(Pb)和锌(Zn)的分布和迁移特征。中国。从典型地区收集了63个剖面的343个土壤样品。浓度，空间分布，研究了铅和锌在水稻土中的迁移行为。结果表明：（1）表层Pb和Zn的浓度范围为17.62-114.07mg/kg和44.98-146.84mg/kg，分别。(2)湘江流域中下游水平含量较高,垂直方向呈现浅层富集特征。(3)Pb迁移弱于Zn迁移,母质对底层土壤Pb和Zn含量的影响最为显著。研究结果将阐明湖南省稻田土壤中铅和锌的含量特征,进一步了解水稻土中Pb和Zn含量的水平分布和垂直迁移转化特征，为科学种植水稻和安全生产粮食提供基础数据。
