| In order to analyze the water saving effect and physiological response for different irrigation methods, through the experiment of general irrigation (GI) and alternate partial root-zone irrigation (APRI) of greenhouse capsicum, analyzed the effects of different irrigation methods to the photosynthetic characteristic, water parameter, CC, R/S and RHC of capsicum leaves and physiological responses of water stress and rewatering. The test results showed that: The APRI treatment can be effectively adjusted the stomatal open degree, reduced the invalid transpiration, saving water was 25.98%. Comparing with the GI treatment, the WUE, CSC, CC and R/S increased by 3.19%, 6.56%, 8.04%, 15.38%. While the RHC was reduced by 3.01%. After water stress and rewatering, these two irrigation methods total shown the Tr, WSD and CSC decline, while FWC ascend. Also the alternate partial root-zone irrigation (APRI) for capsicum has better physiological regulating function for water stress and rewatering. |