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Temperature sensitivity of organic matter mineralization as affected by soil edaphic properties and substrate quality
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SYSNO ASEP 0557486 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Temperature sensitivity of organic matter mineralization as affected by soil edaphic properties and substrate quality Tvůrce(i) Feng, C. (CN)
Godbold, Douglas (UEK-B) ORCID, SAI
Sun, H. (CN)
Wei, L.N. (CN)
Zhang, Y.D. (CN)Celkový počet autorů 5 Číslo článku 105901 Zdroj.dok. Catena. - : Elsevier - ISSN 0341-8162
Roč. 210, MAR (2022)Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova microbial community structure ; carbon-cycle feedbacks ; use efficiency ; co2 emissions ; decomposition ; biomass ; forest ; respiration ; nitrogen ; turnover ; pQ(10)/p ; Soil properties ; doc ; N mineralization ; MBC/MBN ratio ; Substrate induced respiration Vědní obor RIV EH - Ekologie - společenstva Obor OECD Water resources CEP LO1415 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Způsob publikování Open access Institucionální podpora UEK-B - RVO:86652079 UT WOS 000790433700004 EID SCOPUS 85120475243 DOI 10.1016/j.catena.2021.105901 Anotace Warming in ecosystems simultaneously changes soil temperatures and inputs of organic matter into soils. Soil chemical properties and exogenous substrate inputs both have significant effects on the temperature sensitivity (Q(10)) of mineralization. In this study, three soil types (Cambisol, Chernozem and Luvisol) were collected from natural forests at three latitudes in temperate China, whereas the vegetation types are mixed broadleaf-conifer, broadleaf and conifer respectively. The soils differed in soil organic carbon (SOC) contents in the order Chernozem (8.5%), Luvisol (6%), Cambisol (3.6%). The soils were incubated for 40 days at three temperatures (5, 15, and 25 ?). Glucose and maize leaf powder were added as exogenous substrates. To add the same amounts of soluble carbon glucose and maize leaf powder were added at the rate of 2 and 4 mg C g(-1) soil, respectively. Independent of substrate addition, the Chernozem had the highest cumulative CO2 efflux under all temperature treatments. Maize addition accelerated cumulative CO2 efflux more than glucose in most treatments. The Q10 value was higher (P < 0.05) in the Chernozem (1.29 ~ 1.49) than the Cambisol (1.17 ~ 1.28) and the Luvisol (1.10 ~ 1.29), both in the treatments and the control. Soil Q10 was positively correlated (P < 0.001) with DOC and mineral N content, but negatively correlated (P < 0.001) with the MBC/MBN ratio. However, the effect of exogenous substrate addition on Q(10) varied between the different soil types. Addition of both substrates reduced Q(10) by 8.7 ~ 13.4% in the Chernozem and by 10 ~ 14.0% in the Luvisol, whereas maize input increased (P < 0.05) Q10 by 7.6% in the Cambisol. These results suggested that DOC, mineral N and MBC/MBN ratio significantly influenced Q(10), whereas the effects of exogenous substrates on soil respiration and Q10 were highly dependent on SOC content and substrate type. Pracoviště Ústav výzkumu globální změny Kontakt Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Rok sběru 2023 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0341816221007591?via%3Dihub
Počet záznamů: 1