The subject investigated is a sapling semi-arid plantation where grows Armeniaca sibirica, Pinus sylvestris var. mongolica and Jinhong apple, and this plantation lies in Linxi Country in Inner Mongolia. Firstly, we measured different kinds of growth factors and detected how they affect the growing of the plantlet .Secondly, we used the gray relative analysis, and find the leading-role factors which influence the growth of the three young plant. The results indicated that the dominant factors affe...