Indications that long-term nitrogen loading limits carbon resources for soil microbes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F17%3A43895753" target="_blank" >RIV/60076658:12310/17:43895753 - isvavai.cz</a>

Result on the web

<a href="https://ac.els-cdn.com/S003807171630325X/1-s2.0-S003807171630325X-main.pdf?_tid=13d6abee-f925-11e7-91a5-00000aab0f6c&acdnat=1515932510_39bcc19f3c019bb4e9c7dd6b7655592f" target="_blank" >https://ac.els-cdn.com/S003807171630325X/1-s2.0-S003807171630325X-main.pdf?_tid=13d6abee-f925-11e7-91a5-00000aab0f6c&acdnat=1515932510_39bcc19f3c019bb4e9c7dd6b7655592f</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.soilbio.2017.07.015" target="_blank" >10.1016/j.soilbio.2017.07.015</a>

Result language

angličtina

Original language name

Indications that long-term nitrogen loading limits carbon resources for soil microbes

Original language description

Microbial communities in the organic horizon (O-horizon) of forest soils play key roles in terrestrial nitrogen (N) cycling, but effects on them of long-term high N loading, by N deposition or experimental addition, are not fully understood. Thus, we investigated N-loading effects on soil microbial biomass N, carbon (C) and phosphorus stoichiometry, hydrolytic and oxidative enzymes, community composition (via phospholipid fatty acids, PLFA) and soil chemistry of the O-horizon in study plots of three well studied experimental Norway spruce (Picea abies) forests in Sweden and the Czech Republic. These forests span substantial gradients in current N deposition, experimental N addition and nitrate (NO3-) leaching. Current N deposition ranges from similar to 3 kg ha(-1) year of N in central Sweden (Strasan) to similar to 15 kg ha(-1) year of N in SW Sweden (Skogaby) and Czech Republic (Certovo). Furthermore, accumulated historical N loading during 1950-2000 (which include experimental N addition performed at Strasan and Skogaby) ranged similar to 200-similar to 2000 kg ha(-1) of N. Across all sites and treatments, current NOT leaching ranged from low (similar to 0.1 kg ha(-1) year(-1) of N) at Strasan, to high (similar to 15 kg ha(-1) year(-1) of N) at Skogaby and Certovo. We found significantly lower C/N ratios and greater amounts of extractable inorganic N species in the forest soils&apos; O-horizons at the high N loading plots. Microbial biomass and basal respiration decreased under experimental N addition treatments and tended to decrease with increased N deposition. Similarly, activities of hydrolytic enzyme activity associated with N acquisition were lower, although differences in activities at specific sites with the highest and intermediate historical N deposition levels failed statistical significance. Conversely, activities of soil hydrolytic enzymes associated with C acquisition were greater in study plots exposed high N loading.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

40104 - Soil science

Project

<a href="/en/project/GAP504%2F12%2F1218" target="_blank" >GAP504/12/1218: The effect of natural dieback of mountain spruce forest on microclimate, chemistry, and biodiversity of terrestrial and aquatic ecosystems.</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Soil Biology &amp; Biochemistry

ISSN

0038-0717

e-ISSN

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Volume of the periodical

115

Issue of the periodical within the volume

DEC 2017

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

310-321

UT code for WoS article

000414880000034

EID of the result in the Scopus database

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