气候变化领域集成服务门户(CCPortal): Soil C, N and P cycling enzyme responses to nutrient limitation under elevated CO2

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DOI	10.1007/s10533-020-00723-1
	Soil C, N and P cycling enzyme responses to nutrient limitation under elevated CO2
	Keane J.B.; Hoosbeek M.R.; Taylor C.R.; Miglietta F.; Phoenix G.K.; Hartley I.P.
发表日期	2020
ISSN	0168-2563
起始页码	221
结束页码	235
卷号	151 期号:2020-02-03
英文摘要	Abstract: Elevated CO2 (eCO2) can stimulate plant productivity and increase carbon (C) input to soils, but nutrient limitation restricts productivity. Despite phosphorus (P)-limited ecosystems increasing globally, it is unknown how nutrient cycling, particularly soil microbial extra cellular enzyme activity (EEA), will respond to eCO2 in such ecosystems. Long-term nutrient manipulation plots from adjacent P-limited acidic and limestone grasslands were exposed to eCO2 (600 ppm) provided by a mini-Free Air CO2 Enrichment system. P-limitation was alleviated (35 kg-P ha−1 y−1 (P35)), exacerbated (35 kg-N ha−1 y−1 (N35), 140 kg-N ha−1 y−1 (N140)), or maintained (control (P0N0)) for > 20 years. We measured EEAs of C-, N- and P-cycling enzymes (1,4-β-glucosidase, cellobiohydrolase, N-acetyl β-D-glucosaminidase, leucine aminopeptidase, and acid phosphatase) and compared C:N:P cycling enzyme ratios using a vector analysis. Potential acid phosphatase activity doubled under N additions relative to P0N0 and P35 treatments. Vector analysis revealed reduced C-cycling investment and increased P-cycling investment under eCO2. Vector angle significantly increased with P-limitation (P35 < P0N0 < N35 < N140) indicating relatively greater investment in P-cycling enzymes. The limestone grassland was more C limited than the acidic grassland, characterised by increased vector length, C:N and C:P enzyme ratios. The absence of interactions between grassland type and eCO2 or nutrient treatment for all enzyme indicators signaled consistent responses to changing P-limitation and eCO2 in both grasslands. Our findings suggest that eCO2 reduces C limitation, allowing increased investment in P- and N-cycle enzymes with implications for rates of nutrient cycling, potentially alleviating nutrient limitation of ecosystem productivity under eCO2. Graphic abstract: [InlineMediaObject not available: see fulltext.] © 2020, The Author(s).
英文关键词	Climate change; eCO2; Enzyme stoichiometry; Nitrogen; Phosphorus; Soil microbe
语种	英语
来源期刊	Biogeochemistry
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153085
作者单位	Department of Animal and Plant Sciences, The University of Sheffield, Alfred Denny, Building, Western Bank, Sheffield, S10 2TN, United Kingdom; Geography, College of Life and Environmental Sciences, University of Exeter, Amory Building, Rennes Drive, Exeter, EX4 4RJ, United Kingdom; Soil Chemistry, Wageningen University, PO Box 47, Wageningen, 6700AA, Netherlands; Istituto Di Biometeorologia - Consiglio Nazionale Delle Ricerche, Sede centrale: via Giovanni Caproni 8, Firenze, 50145, Italy
推荐引用方式 GB/T 7714	Keane J.B.,Hoosbeek M.R.,Taylor C.R.,et al. Soil C, N and P cycling enzyme responses to nutrient limitation under elevated CO2[J],2020,151(2020-02-03).
APA	Keane J.B.,Hoosbeek M.R.,Taylor C.R.,Miglietta F.,Phoenix G.K.,&Hartley I.P..(2020).Soil C, N and P cycling enzyme responses to nutrient limitation under elevated CO2.Biogeochemistry,151(2020-02-03).
MLA	Keane J.B.,et al."Soil C, N and P cycling enzyme responses to nutrient limitation under elevated CO2".Biogeochemistry 151.2020-02-03(2020).