Effects Of Different Levels Of Water, Traffic And Nitrogen Stresses On Physiological And Morphological Traits Of Zoysiagrasses

Shanghai JD-1 Zoysia, a new cultivar nurtured by Center for Turfgrass Science of Shanghai Jiaotong University, which was selected as the research object. Being exposed to different levels of water (90%, 75% and 50% field capacity, respectively), traffic (0 tread per day, 20 tread per 3 days, 20 tread per day, respectively) and nitrogen(N0 (0g/㎡),N1(8g/㎡), and N2(16g/㎡)) treatments, variations of several important photosynthetic, physiological and turf qualities of zoysiagrasses were investigated, based on which, effects of water, traffic and nitrogen treatments as well as their synergy on photosynthetic, physiological and turf qualities of zoysiagrasses were illuminated.1. Effects of water stresses on growth and photosynthetic traits of zoysiagrasses1.1 Pn, leaf photosynthesis, stomatal conductance, biomass and density of 50% field capacity were significant lower than that of 90% field capacity, which implied that turf quality and photosynthetic traits were hard to maintain in 50% field capacity.1.2 t leaf photosynthesis of 75% filed capacity was significant lower than that of 90% field capacity, while there was no significant difference in their Pn and WUE, which indicates that turf quality, canopy viability and WUE were maintained in an acceptable in 75% field capacity.