ABSTRACT Potatoes are a staple food in New Zealand and a contributing source of dietary cadmium (Cd), although there is little information nationally on the soil and plant factors that affect Cd concentrations in the crop. We measured Cd concentrations in 10 commercial potato cultivars grown in three field sites across New Zealand and assessed the soil factors that affect Cd concentrations. Cadmium concentrations in potato tubers ranged from 0.004 to 0.574 mg kg−1 DW (0.001–0.113 mg kg−1 FW), although overall Cd concentrations were lower than the maximum limit of 0.1 mg kg−1 FW for human consumption. There were significant differences (2.8-fold) in Cd concentrations between potato cultivars, although these varied by site. No significant relationships were found between soil properties and Cd concentrations in potatoes. Management of Cd in potatoes is likely to be most effective by avoiding growing high-Cd-accumulating cultivars in soils with elevated Cd. Further studies could determine if other management factors such as irrigation or type and rates of fertiliser affect Cd concentrations in potatoes.

中文翻译：

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品种类型和土壤性质对马铃薯镉含量的影响

摘要 马铃薯是新西兰的主食，也是膳食中镉 (Cd) 的重要来源，尽管全国范围内关于影响作物中镉浓度的土壤和植物因素的信息很少。我们测量了在新西兰三个田间种植的 10 个商业马铃薯品种的 Cd 浓度，并评估了影响 Cd 浓度的土壤因素。马铃薯块茎中的镉浓度范围为 0.004 至 0.574 mg kg-1 DW（0.001-0.113 mg kg-1 FW），尽管总体 Cd 浓度低于人类消费的最大限值 0.1 mg kg-1 FW。马铃薯品种之间的 Cd 浓度存在显着差异（2.8 倍），尽管这些差异因地点而异。土壤性质与马铃薯中 Cd 浓度之间没有发现显着关系。通过避免在镉含量高的土壤中种植高镉积累品种，对马铃薯中的镉进行管理可能是最有效的。进一步的研究可以确定其他管理因素，如灌溉或肥料的类型和比例是否会影响马铃薯中的 Cd 浓度。