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Aggravated phosphorus limitation on biomass production under increasing nitrogen loading: a meta-analysis
Li Y.; Niu, S. L.; Yu, G. R.
Source PublicationGlobal Change Biology
Keywordaboveground biomass production belowground biomass production global synthesis P limitation plant N concentration plant P concentration terrestrial ecosystem n-p ratios terrestrial ecosystems nutrient limitation soil-nitrogen dinitrogen fixation global analysis rain-forests plants fertilization availability
AbstractNitrogen (N) and phosphorus (P), either individually or in combination, have been demonstrated to limit biomass production in terrestrial ecosystems. Field studies have been extensively synthesized to assess global patterns of N impacts on terrestrial ecosystem processes. However, to our knowledge, no synthesis has been done so far to reveal global patterns of P impacts on terrestrial ecosystems, especially under different nitrogen (N) levels. Here, we conducted a meta-analysis of impacts of P addition, either alone or with N addition, on aboveground (AGB) and belowground biomass production (BGB), plant and soil P concentrations, and N:P ratio in terrestrial ecosystems. Overall, our meta-analysis quantitatively confirmed existing notions: (i) colimitation of N and P on biomass production and (ii)more P limitation in tropical forest than other ecosystems. More importantly, our analysis revealed new findings: (i) P limitation on biomass production was aggravated by N enrichment and (ii) plant P concentration was a better indicator of P limitation than soil P availability. Specifically, P addition increased AGB and BGB by 34% and 13%, respectively. The effect size of P addition on biomass production was larger in tropical forest than grassland, wetland, and tundra and varied with P fertilizer forms, P addition rates, or experimental durations. The P-induced increase in biomass production and plant P concentration was larger under elevated than ambient N. Our findings suggest that the global limitation of P on biomass production will become severer under increasing N fertilizer and deposition in the future.
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Document TypeSCI/SSCI论文
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GB/T 7714
Li Y.,Niu, S. L.,Yu, G. R.. Aggravated phosphorus limitation on biomass production under increasing nitrogen loading: a meta-analysis. 2016.
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