喀斯特
污染
环境科学
可持续发展
农业工程
工程类
地理
生物
生态学
考古
作者
Cheng Li,Tao Yu,Zhongcheng Jiang,Wenli Li,Dong-Xing Guan,Yeyu Yang,Jie Zeng,Haofan Xu,Liu Shao-hua,Xiaohua Wu,Guodong Zheng,Zhongfang Yang
标识
DOI:10.1016/j.scitotenv.2024.176650
摘要
Karst soils often exhibit elevated zinc (Zn) levels, providing an opportunity to cultivate Zn-enriched crops. (meanwhile) However, these soils also frequently contain high background levels of toxic metals, particularly cadmium (Cd), posing potential health risks. Understanding the bioaccumulation of Cd and Zn and the related drivers in a high geochemical background area can provide important insights for the safe development of Zn-enriched crops. Traditional models often struggle to accurately predict metal levels in crop systems grown on soils with high geochemical background. This study employed machine learning models, including Random Forest (RF), Support Vector Machine (SVM), and Extreme Gradient Boosting (XGBoost), to explore effective strategies for sustainable cultivation of Zn-enriched crops in karst regions, focusing on bioaccumulation factors (BAF). A total of 10,986 topsoil samples and 181 paired rhizosphere soil-crop samples, including early rice, late rice, and maize, were collected from a karst region in Guangxi. The SVM and XGBoost models demonstrated superior performance, achieving R
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