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Soil C, N and P cycling enzyme responses to nutrient limitation under elevated CO2

التفاصيل البيبلوغرافية
العنوان: Soil C, N and P cycling enzyme responses to nutrient limitation under elevated CO2
المؤلفون: Gareth K. Phoenix, Marcel R. Hoosbeek, Franco Miglietta, Iain P. Hartley, Christopher R. Taylor, J. Ben Keane
المصدر: Biogeochemistry 151 (2020)
Biogeochemistry, 151, 221-235
سنة النشر: 2020
مصطلحات موضوعية: Nutrient cycle, Bodemscheikunde en Chemische Bodemkwaliteit, 010504 meteorology & atmospheric sciences, Nitrogen, chemistry.chemical_element, 01 natural sciences, eCO, Animal science, Nutrient, Environmental Chemistry, Climate change, Ecosystem, Soil microbe, 0105 earth and related environmental sciences, Earth-Surface Processes, Water Science and Technology, WIMEK, biology, Chemistry, Enzyme stoichiometry, Phosphorus, Acid phosphatase, 04 agricultural and veterinary sciences, Enzyme assay, Productivity (ecology), 040103 agronomy & agriculture, biology.protein, 0401 agriculture, forestry, and fisheries, Cycling, Soil Chemistry and Chemical Soil Quality
الوصف: 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 2 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 "Image missing"
وصف الملف: application/pdf
اللغة: English
تدمد: 0168-2563
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2bf478fe007c5c8506427742a99ee337
https://research.wur.nl/en/publications/soil-c-n-and-p-cycling-enzyme-responses-to-nutrient-limitation-un
حقوق: OPEN
رقم الأكسشن: edsair.doi.dedup.....2bf478fe007c5c8506427742a99ee337
قاعدة البيانات: OpenAIRE
الوصف
تدمد:01682563