The study aimed to elucidating the seasonal variations of copper (Cu2+) and zinc (Zn2+) contents occurring in Atriplex canescens shrubs, as well as in surrounding soil. Cu and Zn concentrations were determined using X-ray fluorescence (XRF) spectrometry. Data were compared with those reported in other Atriplex species from different regions of the world. The results disclosed that the highest plant accumulation of Zn occurred in summer and autumn. However, Cu level remained unchanged (p > 0.05) during all seasons. For the surrounding soil, the highest Cu and Zn amounts were found in summer season. The maximum bioaccumulation factor (BF) of Zn was recorded in summer and autumn. Nevertheless for Cu, this parameter did not change significantly (p > 0.05) between seasons. Comparison of data with daily requirements of sheep revealed that Cu and Zn contents in A. canescens were not enough to meet the physiological requirements of ruminants, except for Zn in autumnal period. Animals browsing this saltbush must be supplemented with Cu and Zn during the seasons for better performance.

中文翻译：

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来自阿尔及利亚干旱牧场的草丛 (Atriplex canescens (Pursh) Nutt.) 中铜和锌浓度的季节性变化

该研究旨在阐明 Atriplex canescens 灌木以及周围土壤中铜 (Cu2+) 和锌 (Zn2+) 含量的季节性变化。使用 X 射线荧光 (XRF) 光谱法测定 Cu 和 Zn 浓度。数据与来自世界不同地区的其他 Atriplex 物种中报告的数据进行了比较。结果表明，植物对锌的最高积累出现在夏秋季节。然而，Cu 水平在所有季节都保持不变（p > 0.05）。对于周围的土壤，在夏季发现了最高的铜和锌含量。锌的最大生物蓄积因子（BF）记录在夏秋季节。尽管如此，对于铜，该参数在季节之间没有显着变化（p > 0.05）。与绵羊日需要量数据对比发现，除秋季锌外，麦穗芦荟中铜、锌含量不足以满足反刍动物的生理需要。在季节期间浏览这种盐丛的动物必须补充铜和锌以获得更好的表现。