Cadmium dynamics in soil pore water and uptake by rice: Influences of soil-applied selenite with different water managements

Environmental Pollution
Yanan WanHuafen Li

Abstract

Cadmium (Cd) in rice grains is a potential threat to human health. This study investigated the effects of selenite fertilisation (0 mg kg-1, 0.5 mg kg-1, and 1.0 mg kg-1) on soil solution Cd dynamics and rice uptake. Rice was grown in two Cd-contaminated soils in Jiangxi and Hunan Provinces under two different sets of conditions: aerobic and flooded. The experiments were conducted in pots. The plants were harvested at the seedling stage and at maturity to determine their Cd levels. Soil solutions were also extracted during the growing season to monitor Cd dynamics. The results showed that in the Jiangxi soil (pH 5.25), Cd concentrations in the soil solutions, seedlings, and mature rice plants were higher under aerobic than under flooded water management conditions. In the Hunan soil (pH 7.26), however, flooding decreased Cd levels in the rice seedlings but not in mature plants. Selenite additions to the Hunan soil decreased Cd concentrations in the soil solutions and in the mature rice plants. These effects were not observed for the solutions or the plants from Jiangxi soil amended with selenite. Relative to the control treatment, 0.5 mg kg-1 selenite decreased the rice grain Cd content by 45.2% and 67.7% under aerobic and floo...Continue Reading

Citations

Apr 3, 2020·Environmental Science and Pollution Research International·Na LiShiqiang Wei
Aug 9, 2020·Environmental Science and Pollution Research International·Yi-Min ZhouMing Lei
Jan 9, 2020·Environmental Science and Pollution Research International·Tiejun WangHui Han
May 6, 2020·International Journal of Environmental Research and Public Health·Tiejun WangHui Han
Aug 12, 2021·Environmental Science and Pollution Research International·Qiongli BaoYizong Huang
Dec 14, 2021·The Science of the Total Environment·Abu Bakkar SiddiqueRavi Naidu

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