Increased plant uptake of native soil nitrogen following fertilizer addition – not a priming effect?

Xiao Jun Allen Liu, Kees Jan van Groenigen, Paul Dijkstra, Bruce A Hungate

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Fertilizer inputs affect plant uptake of native soil nitrogen (N), yet the underlying mechanisms remain elusive. To increase mechanistic insight into this phenomenon, we evaluated the effect of fertilizer addition on mineralization (in the absence of plants) and plant uptake of native soil N. We synthesized 43 isotope tracer (15N) studies and estimated the effects of fertilizer addition using meta-analysis. We found that organic fertilizer tended to reduce native soil N mineralization (−99 kg ha−1 year−1; p = 0.09) while inorganic fertilizer tended to increase N priming (58 kg ha−1 year−1; p = 0.17). In contrast, both organic and inorganic fertilizers significantly increased plant uptake of native soil N (179 and 107 kg ha−1 year−1). Organic fertilizer had greater effect on plant uptake than on mineralization of native soil N (p < 0.001), but inorganic fertilizer had similar effects. Fertilizer effects on mineralization and plant uptake of native soil N were not influenced by study location (laboratory or field) and duration, soil texture, carbon and N content, and pH. Fertilizer addition variably affected native soil N mineralization but consistently increased plant uptake of native soil N. The positive effect of organic fertilizer on plant uptake of native soil N can not be explained by its negative effect on native soil N mineralization, suggesting that increased plant uptake of native soil N was caused mostly by plant-mediated mechanisms (e.g., increased root growth, rhizosphere N priming) rather than by soil microbe-mediated mechanisms.

Original languageEnglish (US)
Pages (from-to)105-110
Number of pages6
JournalApplied Soil Ecology
Volume114
DOIs
StatePublished - Jun 1 2017

Fingerprint

Fertilizers
soil nitrogen
nitrogen fertilizers
Nitrogen
Soil
fertilizer
uptake mechanisms
mineralization
soil
organic fertilizers
fertilizers
mineral fertilizers
effect
isotope labeling
meta-analysis
Rhizosphere
soil texture
soil microorganisms
rhizosphere
root growth

Keywords

  • N isotope tracer
  • N labeled fertilizer
  • Added nitrogen interaction
  • Mineralization and immobilization
  • Plant-soil interaction
  • Rhizosphere priming

ASJC Scopus subject areas

  • Ecology
  • Agricultural and Biological Sciences (miscellaneous)
  • Soil Science

Cite this

Increased plant uptake of native soil nitrogen following fertilizer addition – not a priming effect? / Liu, Xiao Jun Allen; van Groenigen, Kees Jan; Dijkstra, Paul; Hungate, Bruce A.

In: Applied Soil Ecology, Vol. 114, 01.06.2017, p. 105-110.

Research output: Contribution to journalArticle

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