Abstract:The growth and exchange characteristics of CO2 and H2O in ginger leaves of the cultivar, Laiwu large ginger, under the same fertilizer amount were analyzed in this study. There were three treatments, conventional irrigation and fertilization (CK), drip irrigation and fertilization (T1) and integration of water and fertilizer (T2). Compared with CK, the dry biomasses of the rhizomes are increased by 11.15% and 16.95% respectively, and the dry biomass of stems and leaves in T1 and T2 have no significant differences. The integration of water and fertilizer could significantly improve the pigment content and net photosynthetic rate (Pn), reduce the transpiration rate (Tr), and increase instantaneous water use efficiency (WUE) of the ginger leaves. Compared with CK, the contents of chlorophyll and photosynthetic rates in T1 and T2 are increased by 6.77%, 8.99% and 10.21%, 16.23% respectively on Sep.16 (At the period of rhizome enlargement), the transpiration rates in T1 and T2 are reduced by 10.19% and 9.42% respectively on Aug.20 (at the period of tillering stage). The instantaneous water use efficiencies have no significant differences in T1 and T2, which are significantly higher than that of CK. At 9:00 on August 26th, the WUEs which reaches the peaks, and increased by 23.83% and 28.74% in T1 and T2. The irrigation water productivity in treatments of T1 and T2 are increased by 132.06% and 146.79%, and the fertilizer partial productivities are increased by 12.54% and 17.94%.