Effects of combined amendments on crop yield and cadmium uptake in two cadmium contaminated soils under rice-wheat rotation

Ecotoxicology and Environmental Safety
Fuyu GuoXingxiang Wang

Abstract

Soil cadmium (Cd) contamination in China has become a serious concern due to its high toxicity to human health through food chains. A pot experiment was conducted to investigate the effects of hydrated lime (L), hydroxyapatite (H) and organic fertilizer (F) alone or in combination to remedy a mild (DY) and a moderate (YX) Cd contaminated agricultural soil under rice-wheat rotation. Results showed that crops grain yield and Cd concentration, soil pH, CaCl2 extractable Cd and Cd speciation were markedly affected by the amendments. In both cropping seasons, hydrated lime and hydroxyapatite significantly immobilized soil Cd, and hydroxyapatite, organic fertilizer significantly increased grain yield. Hydrated lime mainly increased soil carbonates bound Cd fractions resulted from 16.7% to 36.2% and from 16.8% to 28.3%, and hydroxyapatite increased Fe/Mn oxides Cd fractions from 19.3% to 33.4% and from 31.4% to 42.1% in the DY and YX soils, respectively; while organic fertilizer slightly increased soil exchangeable and organic matter bound Cd fractions. Besides, combined amendments contain alkaline materials and organic materials have the potential to decrease grain Cd and increase grain yield simultaneously. Therefore, in view of the...Continue Reading

Citations

May 23, 2019·Environmental Science and Pollution Research International·Shanshan LiShibao Chen
Jul 11, 2020·Environmental Science and Pollution Research International·Aiguo YinJunliang Xin
Mar 8, 2020·International Journal of Environmental Research and Public Health·Mo-Ming LanYe-Tao Tang
Mar 23, 2019·Bulletin of Environmental Contamination and Toxicology·Di Zhang, AiFang Ding
Dec 2, 2020·The Science of the Total Environment·Babar HussainMuhammad Farooq
Jun 6, 2020·The Science of the Total Environment·Yangyang WangRunhua Chen
Mar 14, 2021·Environmental Science and Pollution Research International·Hongyan YuLuyi Zou
Jun 3, 2021·International Journal of Environmental Research and Public Health·Meiliang DongPing Zhuang
Jul 18, 2021·Ecotoxicology and Environmental Safety·Imran KhanLinkai Huang

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