TITLE:
Analysis and Assessment on the Heavy Metals in a Severely Degraded Subtropical Red Soil Region
AUTHORS:
Fang Wang, Yun Zhou, Xiangping Fu, Yuxiao Zhao, Yiyao Wen, Xintao Cui, Shunbao Lu, Yanjie Zhang
KEYWORDS:
Subtropical Forest Type, Degraded Red Soil, Heavy Metals, Pollution Evaluation
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.15 No.2,
February
22,
2024
ABSTRACT: 5 different forests of Pinus
massoniana, Schima superba, Liquidambar formosana, P. massoniana × S. superba, P. massoniana × L. formosana as the research object
were set up to study the Cr, Cu and Zn content of degraded red soil region in
subtropics. The soil heavy metal pollution degree was evaluated by national
environmental quality standard (II class).
The results showed that three soil metals of P. massoniana × S. superba were the highest, and the soil metals enrichment ability was strong. The order
of single factor pollution index of metal elements was Cu (1.38) > Cr (0.81)
> Zn (0.42), and moderately pollution,
pollution warning and no pollution, respectively. There was no significant correlation between three soil heavy
metals and soil total carbon (TC), total nitrogen (TN) and total
phosphorus (TP). These results suggested that the accumulation of heavy metal
elements was not derived from the parent material of soil. There was a
significant positive correlation between the three metal elements which indicated
that the sources of the three elements were similar. The structural equation
model showed that the direct and indirect effects among the influencing factors
ultimately affected the activity of heavy metals by cascade effects.