The annual nutrient uptake and return of the sharptooth oak,Chinese pine and Armand pine stand were334.4and147.2,195.5and66.9,138.8and80.4kg /ha respectively with difference in the determined elements.

• 锐齿栎林、油松林和华山松林5种营养元素年吸收量、归还量分别为334.；4kg/hm2和147