Abstract: According to the determination of net productivity of artificial rubber forest, this paper makes a conclusion of such a forest being a highly-effective ecosystem and demonstrates that planting perennial tropical woody crops and trees is the effective and reliable way for the exploitation and utilization of tropical region, Establishing artificial rubber forest ecosystem is also a feasible mean for that.

Key words: Cu, Rhizobium sp, Acacia auriculaeformis, Growth, Formation of nodules, N₂-fixation activity