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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

40104 - Soil science

Projekt

<a href="/cs/project/GAP504%2F12%2F1218" target="_blank" >GAP504/12/1218: Vliv přirozeného rozpadu horských smrkových porostů na mikroklima, chemismus a biodiversitu terestrických a vodních ekosystémů.</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Soil Biology &amp; Biochemistry

ISSN

0038-0717

e-ISSN

—

Svazek periodika

115

Číslo periodika v rámci svazku

DEC 2017

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

310-321

Kód UT WoS článku

000414880000034

EID výsledku v databázi Scopus

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