Abstract:An experiment was conducted in a plant growth chamber,in which light and temperature were controlled automatically. The soil water content was controlled to 30% (SD),60%(LD) and 90%(CT) of the field watercapacity.This experiment indicated that from the seedling stage to the heading and flowering stage,stomatal resistance in all treatments decreased,but the rate of photosynthesis and transpiration increased gradually.The rate of photosynthesis in LD treatment was similar to or significantly...
