期刊
ENVIRONMENTAL POLLUTION
卷 252, 期 -, 页码 733-741出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2019.05.147
关键词
Cadmium; Lead; Oilseed rape (Brassica napus L); Distribution; Soil properties; Regression analysis
资金
- Ministry of Science and Technology of China [2016YFD0800805]
- Zhejiang Science and Technology Bureau [2018C02029, 2015C03020-3]
- Fundamental Research Funds For Central Universities
Heavy metals contamination in agricultural soil has become a worldwide problem, and soil characteristics modulate metal availability in soils. Four field experiments were conducted simultaneously to evaluate concentration and distribution of cadmium (Cd) and lead (Pb) in 39 oilseed rape cultivars at four agricultural locations with different contamination levels of Cd and Pb, as well as the influence of soil characteristics together with soil total and bioavailable Cd and Pb concentration on metal transfer from soil to oilseed rape. Shoot concentrations of Cd and Pb in oilseed rape cultivars ranged from 0.09 to 3.18 and from 0.01 to 10.5 mg kg(-1) across four sites. For most cultivars, Cd concentration in root or shoot were higher than pod and lowest in seed, while the highest Pb concentration was observed in root followed by shoot and seed. Stepwise multiple linear regression analysis allows for a better estimation of Cd and Pb concentration in oilseed rape while taking soil properties into consideration. The results demonstrated that Cd and Pb concentration in oilseed rape were correlated with soil organic matter (OM), cation exchange capacity (CEC), available phosphorus (AP), available potassium (AK), sand, soil total and available Cd and Pb concentration, and R-2 varied from 0.993 to 0.999 (P < 0.05). The Cd and Pb levels found in oilseed rape indicated its phytoextraction potential for Cd and Pb co-contaminated agricultural soils in winter without stopping agricultural activities. (C) 2019 Elsevier Ltd. All rights reserved.
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