Abstract: Based on the analysis of three types of management (intensive, general and extensive) in the growth period of tung trees, it's concluded that the biological productivity of tung trees is increased with increasing management level. The productivity under intensive management is twice as much as that under extensive management. Therefore, to enhance the management of tung trees can effectively increase their productivity.

Key words: Magnetic treatment, Saline-alkali stress, Peroxidase(POD), Isozyme