Residual effects of sulfur application prior to oilseed rape cultivation on cadmium accumulation in brown rice under an oilseed rape–rice rotation pot experiment

Autor: Lijuan Huang, Xiaosong Yang, Zijian Xie, Songyan Li, Xiaomeng Liang, Zhengyi Hu
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Ecotoxicology and Environmental Safety, Vol 225, Iss , Pp 112765- (2021)
Druh dokumentu: article
ISSN: 0147-6513
DOI: 10.1016/j.ecoenv.2021.112765
Popis: We aimed to investigate how sulfur (S) application prior to oilseed rape cultivation influences the uptake of cadmium (Cd) by rice grown in low- and high-Cd soils. A pot experiment involving four S levels (0, 30, 60, 120 mg S kg−1) combined with two Cd rates (low and high—0.35 and 10.35 mg Cd kg−1, respectively) was conducted. Soil pore water during rice growth and plant tissues at maturity were analyzed. The soil pore water results indicated that S application decreased Cd solubility under submergence due to the S-induced increase of soil pH and the enhancement of sulfide formation in soil micropores. When S was applied at rates of 30, 60 and 120 mg S kg−1, brown rice Cd concentrations decreased by 18%, 18%, and 55% (p
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