Key Laboratory of Environmental Remediation and Ecological Health, Ministry of Education (MOE), College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, People's Republic of China.
Technical Extension Station of Soil Fertilizer and Rural Energy, Qujiang, Quzhou, People's Republic of China.
Environ Pollut. 2019 Sep;252(Pt A):733-741. doi: 10.1016/j.envpol.2019.05.147. Epub 2019 May 29.
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 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 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.
重金属污染已成为全球性问题，土壤特性会影响土壤中金属的有效性。本研究在四个受 Cd 和 Pb 污染程度不同的农田同时开展了四项田间试验，以评估 39 个油菜品种中 Cd 和 Pb 的浓度和分布，以及土壤特性以及土壤总 Cd 和有效态 Cd、Pb 浓度对重金属从土壤向油菜迁移的影响。在四个地点，油菜品种地上部 Cd 和 Pb 的浓度范围分别为 0.09-3.18 和 0.01-10.5 mg/kg。对于大多数品种，根或地上部 Cd 浓度高于角果，最低的在种子中，而 Pb 浓度最高的在根中，其次是地上部和种子。逐步多元线性回归分析可以更好地估算油菜中 Cd 和 Pb 的浓度，同时考虑土壤特性。结果表明，油菜中 Cd 和 Pb 的浓度与土壤有机质（OM）、阳离子交换量（CEC）、有效磷（AP）、有效钾（AK）、砂粒、土壤总 Cd 和有效态 Cd、Pb 浓度呈正相关，R 值范围为 0.993-0.999（P<0.05）。油菜中 Cd 和 Pb 的含量表明，在冬季不停止农业活动的情况下，它具有对 Cd 和 Pb 复合污染农田进行植物提取的潜力。
