The current researches related to N fertilizers and turfgrass mainly focused on N leachate, absorption, application rate and turf quality (Subhrajit et al., 2007). Poa spp. have varied N absorption ability under regular water condition; nitrogen adsorption ability based on root weight is proportional to NUE reversely; nitrogen adsorption ability of Poa spp. mowed routinely is positively correlated to leaf length, surface area, and root length (Jiang and Michael, 2000). The impacts of water and N stress happened simultaneously on turf grass growth has barely been reported. Sun et al. (2010) pointed that the plants treated by high N rate were taller than the control in a research with Zoysia japonica under the same drought condition.