Abstract: Field experiments and laboratorial work were carried out to understand the nutrient cycling patterns in tussah - feeding oak plantation and the effect of disturbance on nutrient equilibrium. The results show that larger proportion of nutrient is stored in root and more nutrients can transfer from leaf to stem. The cocoon is the main form of the secondary productivity of tussah-feeding oak plantation. Its nutrient output level has a greater effect on the internal nutrient cycling in the tree. The decrease of nutrient storage in the tree is the main cause of the decrease of its productivity. Understanding the patterns of nutrient cycling is beneficial to control the disturbance and to enhance the stability of the ecosystem.

Key words: Tussah-feeding oak plantation, Nutrient cycling, Secondary productivity