Natural forests promote phosphorus retention in soil,Global Change Biology

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Natural forests promote phosphorus retention in soil
Global Change Biology ( IF 10.8 ) Pub Date : 2021-11-17 , DOI: 10.1111/gcb.15996
Zhen Yu ₁ , Zhou Guoyi _{1,

2} , Lei Liu ₁ , Stefano Manzoni ₃ , Philippe Ciais ₄ , Daniel Goll ₅ , Josep Peñuelas _{6,

7} , Jordi Sardans _{6,

7} , Wantong Wang ₈ , Jie Zhu ₂ , Lin Li ₁ , Junhua Yan ₂ , Juxiu Liu ₂ , Xuli Tang ₂

Affiliation

Soil phosphorus (P) availability often limits plant productivity. Classical theories suggest that total P content declines at the temporal scale of pedogenesis, and ecosystems develop toward the efficient use of scarce P during succession. However, the trajectory of ecosystem P within shorter time scales of succession remains unclear. We analyzed changes to P pools at the early (I), middle (II), and late (III) stages of growth of plantation forests (PFs) and the successional stages of natural forests (NFs) at 1969 sites in China. We found significantly lower P contents at later growth stages compared to earlier ones in the PF (p < .05), but higher contents at late successional stages than in earlier stages in the NF (p < .05). Our results indicate that increasing P demand of natural vegetation during succession, may raise, retain, and accumulate P from deeper soil layers. In contrast, ecosystem P in PF was depleted by the more rapidly increasing demand outpacing the development of a P-efficient system. We advocate for more studies to illuminate the mechanisms for determining the divergent changes, which would improve forest management and avoid the vast degradation of PF ecosystems suffering from the ongoing depletion of P.

更新日期：2022-01-16

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