Water and nitrogen(N)are the most important limiting factors of plant growth and development.However,effects of N on water translocation and sharing between clonal ramets of bamboo are poorly understood.We performed experiment connected Indocalamus decorus ramets in adjacent pots with different relative soil water contents and three N levels.We determined antioxidase activities,concentration of osmotic adjustment products,O2·–,MDA and photosynthetic pigments,and electrolyte leakage rate in each paired unit.When N supply to supporting ramets increased,their electrolyte leakage rates and contents of O2·– and MDA significantly increased,while antioxidase activities and contents of osmotic adjustment products and photosynthetic pigments in connected dependent ramets increased markedly as their electrolyte leakage rates and contents of O2·– and MDA decreased greatly.When N addition to dependent ramets increased,antioxidant enzyme activity and contents of osmotic adjustment products and photosynthetic pigments decreased in both types of ramets,but electrolyte leakage rates and O2·– and MDA contents increased significantly.Therefore,N addition to either supporting or dependent ramets can improve water physiological integration among Indocalamus decorus ramets in heterogeneous water habitats.N addition to the supporting ramets promotes water translocation among ramets and alleviates water stress of dependent ramets,but N addition to the dependent ramets degrades water supply conditions and exacerbates drought stress damage to dependent ramets.