Abstract:

The growth and nutrition metabolism of Robinia pseudoacacia were investigated by inoculating with the Glomus mosseae and G . constrictum under different nitrogen levels in sterilized soil. The results showed that the colonization, root system vigor, biomass, leaf superoxidedismutase (SOD),catalase (CAT) and nitrate reductase (NR) activity were significantly increased with inoculation with AM fungi,and the parameters were all influnced by the nitrogen levels, increasing and then decreasing with the increasing nitrogen levels, with the peak at 0.4 g ·kg^-1.To the contrast, the contents of malondialdehyde (MDA) and proline (PRO) were decreased first and then increased with the increasing nitrogen levels, with the lowest value at 0.4 g ·kg^-1. Effects of mycorrhiza varied by different AM fungi. Inoculation with G. mosseae has a significant correlation with infection rate and other indices,which promoted the growth and nutrition metabolism of Robinia pseudoacacia .

Key words: AM fungi, nitrogen levels, Robinia pseudoacacia