100 rhizomes of A.lancea were collected in Mt.Maoshan,China,and 4 essential oil components were determined by GC.The correlations of rhizome yield and the 4 essential oil components(atractylon,hinesol, β-eudesmol and atractylodin)were analyzed on wild condition.Results showed lhat the variation of the weight of rhizomes was large.Most of the rhizomes were light widely and the speed of rhizome growing was low, consequently the recovery of resource was slow.All of the rhizomes of A.lancea from Mt.Maoshan cont...