**5. Conclusions**

In conclusion, there were marked monthly dynamics of leaf N and P resorption and C:N:P stoichiometric ratios in both *Castanopsis carlesii* and *Cunninghamia lanceolata* plantations, but the dynamic patterns differed significantly between forest types. Due to the limitation of P, the *Castanopsis carlesii* plantation had a higher P resorption efficiency than its N resorption efficiency, and exhibited a higher N and P resorption in the middle of the growing season to meet the nutrient requirements of the rapid growth period. In contrast, the *Cunninghamia lanceolata* plantation displayed similar levels of N and P resorption due to the co-limitation of N and P and showed higher N and P resorption in the early and late growing season. Furthermore, the correlation showed that the N and P resorption efficiencies displayed strongly significant correlations with temperature and precipitation in both plantations. The results here could further clarify the differences in the dynamics of N

and P utilization strategies between different functional plantations and help to understand the nutrient cycling processes in the subtropical forest ecosystems.

**Author Contributions:** F.W. and X.N. designed the experiments; Y.Z., J.Y., and X.W. collected and examined the samples; Y.Z. analyzed the data and drafted the manuscript; F.W. revised the manuscript. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was funded by the National Natural Science Foundation of China (32171641, 32101509 and 32022056).

**Data Availability Statement:** Not applicable.

**Acknowledgments:** We wish to thank the Fujian Sanming Forest Ecosystem National Observation and Research Station for their support and all those who have helped us in the field sampling and experiments.

**Conflicts of Interest:** The authors declare no conflict of interest.
