Notice of RetractionUse ‘SMATR’ package of R to analysis the variation of plant leaf functional traits under contracting nutrient supply in Horqin Sandy Land

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

Recently atmospheric nitrogen deposition was heavily increased and this would alter carbon cycling process in terrestrial ecosystems. We conducted greenhouse experiments with 8 sand plants under nutrient controlled (simulate the nitrogen deposition), then use `smatr´ package to analysis the variation of the plant leaf functional traits. Our study shows that, LNC, LPC and A<sub>area</sub> were increased while N:P ratio was decreased with nutrient supply. The reason is that, at high nutrient level, larger amounts of nitrogen (LNC) were allocated to electron transport capacity and soluble proteins which leads to higher A<sub>area</sub>. However, changes are small under two nutrient levels in bivariate scaling relationship, which were analyzed via `smatr´ package of R. Only LPC-LNC and LPC-SLA relationships were altered, this was correlated with dramatic change of LPC in high nutrient level. These results suggested that carbon capture strategy of species had altered when nutrient increased.