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Comparison of the nutrient resorption stoichiometry of Quercus variabilis Blume growing in two sites contrasting in soil phosphorus content
School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Shanghai, China; Shanghai Urban Forest Research Station, State Forestry Administration, Beijing, China.
School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Shanghai, China; Shanghai Urban Forest Research Station, State Forestry Administration, Beijing, China.
School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Shanghai, China; Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Beijing, China.
School of Agriculture and Biology and Research Centre for Low-Carbon Agriculture, Shanghai Jiao Tong University, Shanghai, China; Key Laboratory of Urban Agriculture (South), Ministry of Agriculture, Beijing, China.
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2018 (Engelska)Ingår i: Annals of Forest Science, ISSN 1286-4560, E-ISSN 1297-966X, Vol. 75, nr 2, artikel-id 59Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Key message: Foliar phosphorus (P) resorption inQuercus variabilisBlume was significantly lower at a P-rich than at a P-deficient site. Moreover, P resorption strongly decreased, and nitrogen:phosphorus and carbon:phosphorus resorption ratios increased with soil P content. This demonstrates a strong link between foliar P resorption and P content in soils, and emphasizes the importance of P resorption in leaves of trees growing in soils with contrasted P content. Context: Subtropical ecosystems are generally characterized by P-deficient soils. However, P-rich soils develop in phosphate rock areas. Aims: We compared the patterns of nutrient resorption, in terms of ecological stoichiometry, for two sites naturally varying in soil P content. Methods: The resorption efficiency (percentage of a nutrient recovered from senescing leaves) and proficiency (level to which nutrient concentration is reduced in senesced leaves) of 12 elements were determined in two oak (Q. variabilis) populations growing at a P-rich or a P-deficient site in subtropical China. Results: P resorption efficiency dominated the intraspecific variation in nutrient resorption between the two sites. Q. variabilis exhibited a low P resorption at the P-rich site and a high P resorption at the P-deficient site. Both P resorption efficiency and proficiency strongly decreased with soil P content only and were positively related to the N:P and C:P ratios in green and senesced leaves. Moreover, resorption efficiency ratios of both N:P and C:P were positively associated with soil P. Conclusion: These results revealed a strong link between P resorption and P stoichiometry in response to a P deficiency in the soil, and a single- and limiting-element control pattern of P resorption. Hence, these results provide new insights into the role of P resorption in plant adaptations to geologic variations of P in the subtropics.

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Springer-Verlag France , 2018. Vol. 75, nr 2, artikel-id 59
Nyckelord [en]
Ecological stoichiometry, Leaves, Nutrient resorption, Oak, Phosphate rocks, Quercus variabilis, Subtropics
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Skogsvetenskap
Identifikatorer
URN: urn:nbn:se:hig:diva-26788DOI: 10.1007/s13595-018-0727-5ISI: 000432273100001Scopus ID: 2-s2.0-85046905985OAI: oai:DiVA.org:hig-26788DiVA, id: diva2:1213616
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Funding agencies:

- National Key R&D Program of China Grant no: 2016YFC0502501- NSFC, National Natural Science Foundation of China Grant no: 31670626,  31270640 och 31070532

Tillgänglig från: 2018-06-05 Skapad: 2018-06-05 Senast uppdaterad: 2018-06-05Bibliografiskt granskad

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