Abstract：
Although oilseed rape is frequently used as an alternative planting crop in the phytoremediation of cadmium (Cd)-contaminated agricultural land, methods for screening excellent oilseed rape varieties in this regard are inadequate. Herein, we developed a screening method that incorporates Cd accumulation, distribution, and removal, economic output, adaptability to Cd-contaminated agricultural land, and trace element variation. A Cd-adaptability index (Cd-AI) based on 10 agronomic traits was used to measure the adaptability of varieties to Cd-contaminated agricultural land. Moreover, to simplify the evaluation of adaptability, yield, biomass, and pod number with high weightings were selected to construct a discriminant function for Cd-contaminated agricultural land adaptability (correctly classified 94.20%). In a 2 year field trial, we evaluated 225 oilseed rape varieties, among which we identified two promising low-Cd-accumulating and two Cd-remediating varieties. For the low-Cd-accumulating varieties (HuYou17 and DeXingYou558), we obtained grain bioaccumulation factor (BAF) values of 0.07 and 0.08, BAFsoil-stalk values of <1, and economic outputs of RMB 25,054 and 32,292 yuan hm-2, respectively. Similarly, the Cd-remediating varieties (ZaoZa8 and YuYou61) were characterized by BAFsoil-stalk values of 4.65 and 3.61, BAFsoil-grain values of 0.16 and 0.16, Cd removals of 69.02 and 58.25 g hm-2, and economic outputs of RMB 31,189 and 24,962 yuan hm-2, respectively. Compared with the control variety, we detected lower uptakes of multiple trace elements (3-43%) in the low-Cd-accumulating varieties, whereas the Cd-remediating varieties were characterized by 15.40% and 8.30% increases in the accumulation of magnesium and zinc, respectively. Our findings augment the evaluation indices used for evaluating oilseed rape varieties and provide valuable insights from the perspectives of varietal screening and promotional application. The effective varieties identified have application potential for safe production and the remediation of agricultural land without interrupting annual agricultural production, and provide an economically sustainable approach for the utilization of Cd-contaminated agricultural land.
摘要：
尽管油菜在镉（Cd）污染的农田的植物修复中经常被用作替代种植作物，在这方面筛选优秀油菜品种的方法还不够。在这里，我们开发了一种结合Cd积累的筛选方法，分布，和移除，经济产出，对Cd污染农田的适应性，和微量元素的变化。采用基于10个农艺性状的Cd适应性指数(Cd-AI)测定品种对Cd污染农田的适应性。此外，为了简化适应性评估，产量，生物量，选择具有高权重的豆荚数构造Cd污染农田适应性的判别函数（正确分类为94.20％）。在为期两年的现场审判中，我们评估了225个油菜品种，其中我们确定了两个有希望的低Cd积累和两个Cd修复品种。对于低Cd积累品种(HuYou17和DeXingYou558)，我们获得的谷物生物积累因子（BAF）值分别为0.07和0.08，BAF土壤秸秆值<1，经济产出分别为25,054元和32,292元hm-2。同样，Cd修复品种（ZaoZa8和YuYou61）的特征是BAFF土茎值分别为4.65和3.61，BAFF土粒值分别为0.16和0.16，Cd去除量分别为69.02和58.25ghm-2，经济产出分别为31,189和24,962元hm-2。与对照品种相比，我们检测到低Cd积累品种中多种微量元素的摄入量较低（3-43％），而Cd修复品种的特征是镁和锌的积累增加了15.40%和8.30%，分别。我们的发现增加了用于评估油菜品种的评估指标，并从品种筛选和推广应用的角度提供了有价值的见解。确定的有效品种具有在不中断年度农业生产的前提下安全生产和农地整治的应用潜力,并为Cd污染的农业用地的利用提供了一种经济上可持续的方法。
