Relationships among nitrogen （N） and phosphorus （P） supply, leaf N and P concentration, N ： P stoichiometry, and nutrient resorption efficiency reflect plant responses and their adaptive mechanisms to soil N and P condition, and global change （N and P deposition）. This study analyses the influences of N and P additions on leaf N and P concentration, N ： P stoichiometry, and nutrient resorption efficiency of Ophiopogon japonicus Ker-Gawl. in Nanchang City. The results showed that leaf N and P concentration, N ： P stoichiometry, and nutrient resorption efficiency were influenced by N and P supply. N addition increased leaf N concentration, N ： P ratio and N resorption efficiency, and decreased leaf P concentration and P resorption efficiency （P〈0.05） P addition increased leaf P concentration and P resorption efficiency, decreased the N ： P ratio （P〈 0.05）, but had no evident influence on leaf N concentration and N resorption efficiency. N plus P addition gave some improved leaf N and P concentration, N ~ P ratio, and nutrient resorption efficiency. Leaf N ： P ratio could reflect the supply of soil nutrient elements, and was related to N and P resorption efficiency. Compared with simulated N deposition, O. japonicus showed a more sensitive response and weaker regulating ability to simulated P deposition; however it had a stronger ecological function of purifying P deposition. Ecological interactions between N and P on O. japonicus were evident, thus, both N and simultaneously although the role of P was more important than N during soil ground cover in Nanchang City. P nutrient needed to be studied nutrient management of urbanground cover in Nanchang City.
Acta Prataculturae Sinica
urban ground cover plant
simulated N and P deposition ecological stoichiometry
nutrient resorption efficiency
陈伏生（1973-）,男,江西永丰人,副教授,硕士生导师,博士.E-mail： email@example.com; firstname.lastname@example.org