基于Meta分析的广东省农用地土壤重金属污染现状

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Abstract In this paper, we reviewed the measured data of heavy metals in farmland soils in Guangdong Province since 2010. We applied a meta-analysis approach to combine the data based on “average concentration” “number of sampling points” and “standard deviation”. The results showed that the concentration of lead (Pb, 48.83mg/kg) and mercury (Hg, 0.18mg/kg) in Guangdong Province are among the highest in China, likely influenced by industrial and mining activities. In addition, subgroup analyses explored the effects of spatial distribution and cropping systems across different cities. The results revealed that heavy metal concentrations were higher in the economically developed Pearl River Delta and mineral-rich regions. Notably, some of the most polluted cities include Foshan city (As:18.32mg/kg, Cr:73.5mg/kg, Ni: 35.4mg/kg), Shaoguan city (Pb: 86.61mg/kg), Shenzhen city (Cd: 0.51mg/kg), Meizhou city (Cu: 61.1mg/kg), etc. Among them, farmland soil Cd concentration was significantly correlated with regional industrial output value (r=0.77, P<0.01), with additional impacts from factors such as the local population and energy consumption. The analyses of different farming systems showed that Cd, Pb, Zn, Cr, and Hg concentrations in soils were higher in land and paddy fields; while Cu, Zn, As, and Ni were enriched in orchards and facility-based agriculture, which may be related to the soil physicochemical properties, fertiliser and the geological backgrounds in different farming systems. This study provides province-wide information on the spatial distribution of heavy metals in agricultural soils and cropping systems, which is of great significance to the management and control strategies of heavy metal pollution in agricultural soils in Guangdong Province.

Key words： agricultural soil heavy metal meta-analysis spatial distribution

Received: 09 August 2024

PACS:

X53

Corresponding Authors: 王中伟,高级工程师,yeswangzhongwei@163.com E-mail: yeswangzhongwei@163.com

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	HUANG Guo-feng
	WANG Zhong-wei
	XIE Zhi-yi
	LIU Jun
	CHEN Duo-hong

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HUANG Guo-feng,WANG Zhong-wei,XIE Zhi-yi等. Meta analysis of heavy metal pollution in agricultural soil in Guangdong Province[J]. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(3): 1431-1443.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2025/V45/I3/1431

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