N and P combined addition accelerates the release of litter C, N, and most metal nutrients in a N-rich subtropical forest
Tie, Liehua (Guizhou University. Institute for Forest Resources and Environment of Guizhou)
Wei, Shengzhao (Sichuan Agricultural University. College of Forestry)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Liu, Xing (Sichuan Agricultural University. College of Forestry)
Zhou, Shixing (Sichuan Agricultural University. College of Forestry)
Liu, Xiong (Sichuan Agricultural University. College of Forestry)
Bose, Arun K (Swiss Federal Institute for Forest. Snow and Landscape Research)
Huang, Congde (Sichuan Agricultural University. College of Forestry)

Fecha:	2023
Resumen:	Imbalanced nitrogen (N) and phosphorus (P) depositions are profoundly shifting terrestrial ecosystem biogeochemical processes. However, how P addition and its interaction with N addition influence the release of litter carbon (C), N, P, and especially metal nutrients in subtropical forests remains unclear. Herein, a two-year field litterbag experiment was conducted in a natural subtropical evergreen broadleaved forest of southwestern China using a factorial design with three levels of N addition (0, 10, and 20 g N m−2 y−1) and P addition (0, 5, 15 g P m−2 y−1). During two years of decomposition, N- and P-only addition treatments decreased the accumulated mass loss and release rates of litter C, N, P, K, Na, and Mn (p < 0. 05); N and P coaddition treatments increased the accumulated mass loss and release rates of litter C, N, K, Na, Mn, and Cu (p < 0. 05) and decreased the accumulated release rates of litter P and Mg (p < 0. 05); the C/P and N/P ratios of the residual litter increased under the N-only addition treatments (p < 0. 05) and decreased under the P-only addition and N and P coaddition treatments (p < 0. 05). Overall, the results suggest that combined N and P supply can increase biological activities and thus accelerate the release of litter C, N, and most metal nutrients, as expected within the framework of ecological stoichiometry and growth rate hypothesis. Our study also highlights that the effect of N addition on litter C and nutrients release depends on P availability.
Ayudas:	Agencia Estatal de Investigación TED2021-132627B-I00 Agencia Estatal de Investigación PID2020-115770RB-I
Nota:	Altres ajuts: Fundación Ramon Areces grant CIVP20A6621.
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Publicado en:	Science of the total environment, Vol. 881 (July 2023) , art. 163491, ISSN 1879-1026

DOI: 10.1016/j.scitotenv.2023.163491

Disponible a partir de: 2025-07-30 Postprint

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