Classification and regression tree (CART) for predicting cadmium (Cd) uptake by rice (Oryza sativa L.) and its application to derive soil Cd threshold based on field data
Year: 2024
Type: article
Abstract: The entry of Cd into soil-rice systems is a growing concern as it can pose potential risks to public health. To derive regional soil Cd threshold, a total of 333 paired soil and rice samples was collected in Anhui Province, Eastern China. The results showed that the total soil Cd and soil Zn/Cd were the most significant variables contributing to Cd content in polished rice. The Chinese Soil Quality Standards might overestimate risk posed by Cd-contaminated soil for rice production in the mining area due to high Zn/Cd values of some mining-associated soils. Cd levels in polished rice can be predictable using stepwise multiple linear regression (MLR) model. However, the derived soil Cd threshold based on the MLR model would be unrealistically high. The classification and regression tree method (CART) performed well in simulating Cd levels in polished rice and can be used to derive soil Cd threshold instead of MLR to minimize the uncertainty.
Authors: Haoting Tian, Yan Zhang, Xiaohui Yang, Huan Zhang, Dengfeng Wang, Pengbao Wu, Aijing Yin, Chao Gao
Institutions: Suzhou University of Science and Technology, Nanjing University, Nanjing Normal University, Chinese Academy of Tropical Agricultural Sciences, Tropical Crops Genetic Resources Institute, Huizhou University, Ministry of Ecology and Environment, Nanjing Institute of Environmental Sciences
Language: English
Topic: Heavy metals in environment
Subfield: Pollution
Field: Environmental Science
Domain: Physical Sciences
SDG: Zero hunger
Open Access status: gold
Estimated APC paid: $2,990
OpenAlex ID: W4403154012