Comparison of the nutrient resorption stoichiometry of Quercus variabilis Blume growing in two sites contrasting in soil phosphorus content

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Ji , H , Wen , J , Du , B , Sun , N , Berg , B & Liu , C 2018 , ' Comparison of the nutrient resorption stoichiometry of Quercus variabilis Blume growing in two sites contrasting in soil phosphorus content ' , Annals of Forest Science , vol. 75 , no. 2 , 59 . https://doi.org/10.1007/s13595-018-0727-5

Title: Comparison of the nutrient resorption stoichiometry of Quercus variabilis Blume growing in two sites contrasting in soil phosphorus content
Author: Ji, Huawei; Wen, Jiahao; Du, Baoming; Sun, Ningxiao; Berg, Björn; Liu, Chunjiang
Contributor: University of Helsinki, Department of Forest Sciences
Date: 2018-05-14
Language: eng
Number of pages: 10
Belongs to series: Annals of Forest Science
ISSN: 1286-4560
URI: http://hdl.handle.net/10138/310158
Abstract: Key message Foliar phosphorus (P) resorption in Quercus variabilis Blume 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.
Subject: Phosphate rocks
Ecological stoichiometry
Oak
Leaves
Subtropics
Nutrient resorption
Quercus variabilis
2-MILLION-YEAR DUNE CHRONOSEQUENCE
TROPICAL DRY FOREST
N-P STOICHIOMETRY
MULTIELEMENT STOICHIOMETRY
BIOGEOGRAPHIC PATTERNS
SEMIARID GRASSLAND
LOCAL ADAPTATION
LEAF NITROGEN
GROWTH-RATE
CHINA
4112 Forestry
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