TY - JOUR
T1 - Nitrogen and phosphorus resorption in planted forestsworldwide
AU - Jiang, Dalong
AU - Geng, Qinghong
AU - Li, Qian
AU - Luo, Yiqi
AU - Vogel, Jason
AU - Shi, Zheng
AU - Ruan, Honghua
AU - Xu, Xia
N1 - Funding Information:
Funding: This study was financially supported by the National Key Research and Development Program of China (2016YFD0600204), the Recruitment Program for Young Professionals (Thousand Youth Talents Plan), the Jiangsu Specially-Appointed Professors Program, the Six Talent Peaks Program of Jiangsu Province (JY-041& TD-XYDXX-006), the Nanjing Forestry University Science Fund for Distinguished Young Scholars (the “5151” Talent Program), the Jiangsu Collegiate Science and Technology Fund for the Excellent Innovative Research Teams, the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), the Doctorate Fellowship Foundation of Nanjing Forestry University, the Research Innovation Program for College Graduates of Jiangsu Province (KYLX16_0833), and the Scientific and Technological Innovation Program for College Students of Nanjing Forestry University (DXSKC-201617).
Publisher Copyright:
© 2019 by the authors.
PY - 2019
Y1 - 2019
N2 - Nutrient resorption from senescing leaves is one of the plants' essential nutrient conservation strategies. Parameters associated with resorption are important nutrient-cycling constraints for accurate predictions of long-term primary productivity in forest ecosystems. However, we know little about the spatial patterns and drivers of leaf nutrient resorption in planted forests worldwide. By synthesizing results of 146 studies, we explored nitrogen (N) and phosphorus (P) resorption efficiency (NRE and PRE) among climate zones and tree functional types, as well as the factors that play dominant roles in nutrient resorption in plantations globally. Our results showed that the mean NRE and PRE were 58.98% ± 0.53% and 60.21% ± 0.77%, respectively. NRE significantly increased from tropical to boreal zones, while PRE did not significantly differ among climate zones, suggesting differential impacts of climates on NRE and PRE. Plant functional types exert a strong influence on nutrient resorption. Conifer trees had higher PRE than broadleaf trees, reflecting the adaptation of the coniferous trees to oligotrophic habitats. Deciduous trees had lower PRE than evergreen trees that are commonly planted in P-limited low latitudes and have long leaf longevity with high nutrient use efficiency. While non-N-fixing trees had higher NRE than N-fixing trees, the PRE of non-N-fixing trees was lower than that of N-fixing trees, indicating significant impact of the N-fixing ability on the resorption of N and P. Our multivariate regression analyses showed that variations in NRE were mainly regulated by climates (mean annual precipitation and latitude), while variations in PRE were dominantly controlled by green leaf nutrient concentrations (N and P). Our results, in general, suggest that the predicted global warming and changed precipitation regimes may profoundly affect N cycling in planted forests. In addition, green leaf nutrient concentrations may be good indicators for PRE in planted forests.
AB - Nutrient resorption from senescing leaves is one of the plants' essential nutrient conservation strategies. Parameters associated with resorption are important nutrient-cycling constraints for accurate predictions of long-term primary productivity in forest ecosystems. However, we know little about the spatial patterns and drivers of leaf nutrient resorption in planted forests worldwide. By synthesizing results of 146 studies, we explored nitrogen (N) and phosphorus (P) resorption efficiency (NRE and PRE) among climate zones and tree functional types, as well as the factors that play dominant roles in nutrient resorption in plantations globally. Our results showed that the mean NRE and PRE were 58.98% ± 0.53% and 60.21% ± 0.77%, respectively. NRE significantly increased from tropical to boreal zones, while PRE did not significantly differ among climate zones, suggesting differential impacts of climates on NRE and PRE. Plant functional types exert a strong influence on nutrient resorption. Conifer trees had higher PRE than broadleaf trees, reflecting the adaptation of the coniferous trees to oligotrophic habitats. Deciduous trees had lower PRE than evergreen trees that are commonly planted in P-limited low latitudes and have long leaf longevity with high nutrient use efficiency. While non-N-fixing trees had higher NRE than N-fixing trees, the PRE of non-N-fixing trees was lower than that of N-fixing trees, indicating significant impact of the N-fixing ability on the resorption of N and P. Our multivariate regression analyses showed that variations in NRE were mainly regulated by climates (mean annual precipitation and latitude), while variations in PRE were dominantly controlled by green leaf nutrient concentrations (N and P). Our results, in general, suggest that the predicted global warming and changed precipitation regimes may profoundly affect N cycling in planted forests. In addition, green leaf nutrient concentrations may be good indicators for PRE in planted forests.
KW - Climate zones
KW - Green leaf nutrient
KW - Nitrogen and phosphorous
KW - Nutrient resorption
KW - Plant functional types
KW - Planted forests
KW - Precipitation
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U2 - 10.3390/f10030201
DO - 10.3390/f10030201
M3 - Article
AN - SCOPUS:85063860755
SN - 1999-4907
VL - 10
JO - Forests
JF - Forests
IS - 3
M1 - 201
ER -