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.
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美
- 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