Film mulch decreased Fe distribution in the leave of potato and increased that in the stem and tuber, and thus increased Fe uptake and accumulation in the tuber.

• 而铁素在马铃薯体内的分布情况表现为：前4个时期在各个器官中分布的顺序为叶＞茎＞块茎，到成熟期表现为茎＞叶＞块茎。