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Effects of two-year nitrogen and phosphorus additions on nutrient release and enzyme activity during leaf litter decomposition in Larix principis-rupprechtii plantation

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Abstract

Aims

Increasing global nitrogen (N) and phosphorus (P) deposition may affect the response mechanism of litter decomposition. We aimed to explore the responses of nutrient release and enzyme activities to exogenous N and P inputs.

Methods

We conducted a two‑year field litterbag experiment in larch (Larix principis-rupprechtii) plantation at the Saihanba Forest Farm in Hebei Province, China. Four treatments, i.e., N addition (+ N), P addition (+ P), N and P addition (N + P), and control (CK) were designed and examined the overall effect of the fertilization treatments on the remaining mass, nutrients, and enzymatic activity.

Results

In contrast to CK, the + N, + P, and N + P treatments significantly reduced the remaining leaf litter mass by 36.33%, 35.21%, and 38.50% at the end of the experiment, respectively. During the decomposition of leaf litter, + N had a significant effect on carbon (C) release and no significant effect on N and P release. + P promoted C release and significantly reduced the N remaining but increased the P remaining. Invertase activity decreased sharply in the early stage of decomposition. However, the activities of catalase, urease, and acid phosphatase declined in the middle stage in each treatment. The effect of + N on enzyme activities was not significant, while + P significantly increased urease activity.

Conclusion

The results reveal that continuous N and P deposition could promote the litter decomposition rate, while altered the nutrient release pattern in larch plantation.

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Data availability

The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.

Abbreviations

C:

Carbon

N:

Nitrogen

P:

Phosphorus

References

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Acknowledgements

We would like to appreciate our graduate students and many local staff, who have conducted the tough field investigation and sampling work in the study area. We thank Yi Ding for his constructive comments on earlier versions of the manuscript.

Funding

This research was financially supported by the National Natural Science Foundation of China (32071759), the Natural Science Foundation of Hebei Province, China (C2020204026), and the Hebei Province Key R & D Program of China (22326803D).

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Authors and Affiliations

Authors

Contributions

Jing Wang and Zhidong Zhang conceptualized and designed the experiment. DongZhi Wang, Qiang Liu, Jing Wang, Jing Zhang and Ruiming Cheng performed the experiment. DongZhi Wang, Qiang Liu, Zhaoxuan Ge, Jing Wang and Zhidong Zhang discussed and analyzed the data. Zhaoxuan Ge and Zhidong Zhang wrote the manuscript. All authors revised and approved the final manuscript.

Corresponding author

Correspondence to Zhidong Zhang.

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Competing interest

The authors have no relevant financial or non-financial interests to disclose.

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Responsible Editor: Alfonso Escudero.

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Ge, Z., Wang, D., Liu, Q. et al. Effects of two-year nitrogen and phosphorus additions on nutrient release and enzyme activity during leaf litter decomposition in Larix principis-rupprechtii plantation. Plant Soil 487, 521–532 (2023). https://doi.org/10.1007/s11104-023-05950-7

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  • DOI: https://doi.org/10.1007/s11104-023-05950-7

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