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Contrasting responses of soil phosphatase activity to nitrogen and phosphorus loadings: Implications for phosphorus management

Publikation: Bidrag til bog/antologi/rapport/proceedingKonferenceabstrakt i proceedingsForskningpeer review

  • Ji Chen
  • Yiqi Luo, Northern Arizona University
  • ,
  • Junji Cao, Chinese Academy of Sciences
  • ,
  • Uffe Jørgensen
  • Daryl L. Moorhead, University of Toledo, USA
  • Robert L. Sinsabaugh, University of New Mexico
Human activity has caused imbalances in nitrogen (+N) and phosphorus (+P) loadings of ecosystems around the world, causing widespread P limitation of many biological processes. Soil phosphatases catalyze the hydrolysis of P from a range of organic compounds, representing an important P acquisition pathway. Therefore, better understanding of soil phosphatase activity as well as the underlying mechanisms to individual and combined N and P loadings (+N+P) could provide fresh insights for wise P management. Here we show, using a meta-analysis of 188 published studies and 1277 observations that +N significantly increased soil phosphatase activity by 14%, +P significantly repressed it by 30%, and +N+P led to non-significant responses of soil phosphatase activity. Responses of soil phosphatase activity to +N were positively correlated with soil C and N content, whereas the reverse relationships were observed for +P and +N+P. Similarly, effects of +N on soil phosphatase activity were positively related to microbial biomass C, microbial biomass C:P, and microbial biomass N:P, whereas reverse relationships were observed for +P. Although we found no clear relationship between soil pH and soil phosphatase activity, +N-induced reductions in soil pH were positively correlated with soil phosphatase activity. Our results underscore the integrated control of soil and microbial C, N and P stoichiometry on the responses of soil phosphatase activity to +N, +P, and +N+P, which can be used to optimize future P management.
TitelEGU General Assembly 2021 : online, 19–30 Apr 202, EGU21-1655
Antal sider1
Udgivelsesårapr. 2021
StatusUdgivet - apr. 2021
BegivenhedGeneral Assembly 2021: vEGU21: Gather Online - Online
Varighed: 19 apr. 202130 apr. 2021


KonferenceGeneral Assembly 2021

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