Nitrogen enrichment buffers phosphorus limitation by mobilizing mineral-bound soil phosphorus in grasslands

doi:10.1002/ecy.3616

	Nitrogen enrichment buffers phosphorus limitation by mobilizing mineral-bound soil phosphorus in grasslands
	Wang, Ruzhen 1; Yang, Junjie ; Liu, Heyong 1; Sardans, Jordi 2,3; Zhang, Yunhai; Wang, Xiaobo 1; Wei, Cunzheng ; Lu, Xiaotao 1; Dijkstra, Feike A.; Jiang, Yong 1,5; Han, Xingguo6 ; Penuelas, Josep 2,3
	2022
发表期刊	ECOLOGY
ISSN	0012-9658
卷号	103 期号:3
摘要	Phosphorus (P) limitation is expected to increase due to nitrogen (N)-induced terrestrial eutrophication, although most soils contain large P pools immobilized in minerals (P-i) and organic matter (P-o). Here we assessed whether transformations of these P pools could increase plant available pools alleviating P limitation under enhanced N availability. The mechanisms underlying these possible transformations were explored by combining results from a 10-year field N addition experiment and a 3700-km transect covering wide ranges in soil pH, soil N, aridity, leaching, and weathering that could affect soil P status in grasslands. Nitrogen addition promoted the dissolution of immobile P-i (mainly Ca-bound recalcitrant P) to more available forms of P-i (including Al- and Fe-bound P fractions and Olsen P) by decreasing soil pH from 7.6 to 4.7, but did not affect P-o. Soil total P declined by 10% from 385 +/- 6.8 to 346 +/- 9.5 mg kg(-1), whereas available P increased by 546% from 3.5 +/- 0.3 to 22.6 +/- 2.4 mg kg(-1) after the 10-year N addition, associated with an increase in P-i mobilization, plant uptake, and leaching. Similar to the N addition experiment, the drop in soil pH from 7.5 to 5.6 and increase in soil N concentration along the grassland transect were associated with an increased ratio between relatively mobile P-i and immobile P-i. Our results provide a new mechanistic understanding of the important role of soil P-i mobilization in maintaining plant P supply and accelerating biogeochemical P cycles under anthropogenic N enrichment. This mobilization process temporarily buffers ecosystem P limitation or even causes P eutrophication, but will extensively deplete soil P pools in the long run.
关键词	climosequence mineral-bound phosphorus nitrogen deposition phosphorus limitation phosphorus mobilization precipitation gradient
学科领域	Ecology
DOI	10.1002/ecy.3616
收录类别	SCI
语种	英语
WOS关键词	CALCAREOUS SOIL ; P-FRACTIONS ; 4 DECADES ; PRODUCTIVITY ; PHOSPHATE ; CARBON ; AVAILABILITY ; RESPONSES ; BIODIVERSITY ; ACQUISITION
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000751823700001
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1939-9170
资助机构	European Research Council Synergy grant [ERC-SyG2013-610028 IMBALANCE-P] ; National Key Research and Development Program of China [2016YFC0500707] ; National Natural Science Foundation of China [31430016, 31770525, 31870441] ; Spanish government grant [PID2019-110521GB-I00]
作者邮箱	xghan@ibcas.ac.cn
引用统计	被引频次：36[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/28897
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, Erguna Forest Steppe Ecotone Ecosyst Res Stn, Shenyang, Peoples R China 3.CREAF CSIC UAB, Global Ecol Unit, CSIC, Bellaterra, Spain 4.CREAF, Cerdanyola Del Valles, Spain 5.Dijkstra, Feike A.] Univ Sydney, Sydney Inst Agr, Sch Life & Environm Sci, Camden, NSW, Australia 6.Hebei Univ, Sch Life Sci, Baoding, Peoples R China 7.Univ Chinese Acad Sci, Coll Adv Agr Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ruzhen,Yang, Junjie,Liu, Heyong,et al. Nitrogen enrichment buffers phosphorus limitation by mobilizing mineral-bound soil phosphorus in grasslands[J]. ECOLOGY,2022,103(3).
APA	Wang, Ruzhen.,Yang, Junjie.,Liu, Heyong.,Sardans, Jordi.,Zhang, Yunhai.,...&Penuelas, Josep.(2022).Nitrogen enrichment buffers phosphorus limitation by mobilizing mineral-bound soil phosphorus in grasslands.ECOLOGY,103(3).
MLA	Wang, Ruzhen,et al."Nitrogen enrichment buffers phosphorus limitation by mobilizing mineral-bound soil phosphorus in grasslands".ECOLOGY 103.3(2022).

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