Higher resistance of larch-broadleaf mixed forests than larch forests against soil acidification under experimental nitrogen addition
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Higher resistance of larch-broadleaf mixed forests than larch forests against soil acidification under experimental nitrogen addition. / Gao, Meixia; Lin, Guigang; Zhu, Feifei; Wu, Zhou; Gundersen, Per; Zeng, De-Hui; Hobbie, Erik A.; Zhu, Weixing; Fang, Yunting.
In: Plant and Soil, 2024.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Higher resistance of larch-broadleaf mixed forests than larch forests against soil acidification under experimental nitrogen addition
AU - Gao, Meixia
AU - Lin, Guigang
AU - Zhu, Feifei
AU - Wu, Zhou
AU - Gundersen, Per
AU - Zeng, De-Hui
AU - Hobbie, Erik A.
AU - Zhu, Weixing
AU - Fang, Yunting
N1 - Publisher Copyright: © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.
PY - 2024
Y1 - 2024
N2 - Background and aims: Growing evidence has shown that nitrogen (N) deposition can lead to soil acidification and tree nutrient imbalance. Tree species-specific differences in plant-soil interactions may render different forest types exhibiting contrasting responses to N deposition, yet this remains largely untested. Methods: We conducted N addition experiments (0 and 50 kg N ha−1 yr−1) separately in a larch (Larix kaempferi) forest and an adjacent larch-broadleaf mixed forest, and examined whether soil N availability, soil acid–base chemistry, leaf nutrients and stoichiometry of these two forests responded differently to four-year N addition. Results: We found that N addition increased soil nitrate concentrations at four soil layers (i.e. Oa + e, 0–10, 10–20, and 20–40 cm), and resulted in soil acidification at Oa + e and 0–10 cm layers characterized by decreased pH and exchangeable base cations and increased hydrolyzing cations in the larch forest. In contrast to soil chemical properties, larch leaf nutrient stoichiometry except the C:N ratio showed no significant responses to N addition in the larch forest. Moreover, N addition did not significantly affect soil inorganic N concentration, soil acid–base chemistry, and tree leaf nutrients in the larch-broadleaf mixed forest. Conclusions: Our results suggest the higher resistance of larch-broadleaf mixed forests than larch forests against soil acidification under N addition, and highlight the establishment of conifer-broadleaf mixed forests is an important silvicultural practice to alleviate soil acidification induced by N deposition.
AB - Background and aims: Growing evidence has shown that nitrogen (N) deposition can lead to soil acidification and tree nutrient imbalance. Tree species-specific differences in plant-soil interactions may render different forest types exhibiting contrasting responses to N deposition, yet this remains largely untested. Methods: We conducted N addition experiments (0 and 50 kg N ha−1 yr−1) separately in a larch (Larix kaempferi) forest and an adjacent larch-broadleaf mixed forest, and examined whether soil N availability, soil acid–base chemistry, leaf nutrients and stoichiometry of these two forests responded differently to four-year N addition. Results: We found that N addition increased soil nitrate concentrations at four soil layers (i.e. Oa + e, 0–10, 10–20, and 20–40 cm), and resulted in soil acidification at Oa + e and 0–10 cm layers characterized by decreased pH and exchangeable base cations and increased hydrolyzing cations in the larch forest. In contrast to soil chemical properties, larch leaf nutrient stoichiometry except the C:N ratio showed no significant responses to N addition in the larch forest. Moreover, N addition did not significantly affect soil inorganic N concentration, soil acid–base chemistry, and tree leaf nutrients in the larch-broadleaf mixed forest. Conclusions: Our results suggest the higher resistance of larch-broadleaf mixed forests than larch forests against soil acidification under N addition, and highlight the establishment of conifer-broadleaf mixed forests is an important silvicultural practice to alleviate soil acidification induced by N deposition.
KW - Leaf nutrient stoichiometry
KW - Nitrogen deposition
KW - Nitrogen saturation
KW - Soil acidification
KW - Soil exchangeable base cations
KW - Temperate forest
U2 - 10.1007/s11104-024-06677-9
DO - 10.1007/s11104-024-06677-9
M3 - Journal article
AN - SCOPUS:85191529319
JO - Plant and Soil
JF - Plant and Soil
SN - 0032-079X
ER -
ID: 391156359