Eurola Merja, Hietaniemi Veli, Kontturi Markku, Tuuri Hannu, Pihlava Juha-Matti, Saastamoinen Marketta, Rantanen Olli, Kangas Arjo, Niskanen Markku
Agrifood Research Finland (MTT), FIN-31600 Jokioinen, Finland.
J Agric Food Chem. 2003 Apr 23;51(9):2608-14. doi: 10.1021/jf020893+.
The cadmium (Cd) contents of oats (Avena sativa L.) in Finland were examined over a 3 year period in three types of trials: official variety, organic vs conventional cultivation, and nitrogen fertilization trials. Large seasonal and regional variations were found in the Cd concentrations. In official variety trials, the mean Cd contents in 1997, 1998, and 1999 were 0.046, 0.029, and 0.052 mg kg(-1) dry weight (dw), respectively, ranging from 0.008 to 0.120 mg kg(-1) dw. The concentrations were generally well below the maximum permitted level of 0.100 mg kg(-1) fresh weight. No significant differences were found between the organic and the conventional cultivation techniques. Nitrogen (N) fertilization increased the Cd contents of oats especially at high nitrogen rates (160 kg N hectare(-1) (ha)). Significant cultivar differences (p < 0.001) were determined in all trials. Cultivars Salo and Kolbu had consistently higher contents, and Belinda and Roope had lower Cd contents among the different growing conditions. Hence, it is possible to cultivate and develop oat cultivars less likely to accumulate Cd.
在三年时间里，通过三种类型的试验对芬兰燕麦（燕麦属）中的镉（Cd）含量进行了检测：官方品种试验、有机种植与传统种植对比试验以及氮肥试验。结果发现镉浓度存在较大的季节和区域差异。在官方品种试验中，1997年、1998年和1999年燕麦的平均镉含量分别为0.046、0.029和0.052毫克/千克干重（dw），范围在0.008至0.120毫克/千克干重之间。这些浓度总体上远低于0.100毫克/千克鲜重的最大允许水平。有机种植技术和传统种植技术之间未发现显著差异。氮肥尤其是高施氮量（160千克氮/公顷（ha））会增加燕麦的镉含量。在所有试验中均确定了显著的品种差异（p < 0.001）。在不同生长条件下，品种萨洛和科尔布的镉含量始终较高，而贝琳达和罗佩的镉含量较低。因此，有可能培育和开发出镉积累可能性较小的燕麦品种。
