The content of Fe in root, stem and leaf of Calamagrostis angustifolia in upper, middle and lower land reaches the acme in the seedling, and reduces after it matures except in the upper land.

• 高、中和低位区小叶章茎、叶、根中Fe含量季节变化规律为幼苗时期最高 ,成熟后含量减少 (高位区根除外 ) ;