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| Titel |
Soil greenhouse gas fluxes from different tree species on Taihang Mountain, North China |
| VerfasserIn |
X. P. Liu, W. J. Zhang, C. S. Hu, X. G. Tang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 6 ; Nr. 11, no. 6 (2014-03-27), S.1649-1666 |
| Datensatznummer |
250117311
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| Publikation (Nr.) |
 copernicus.org/bg-11-1649-2014.pdf |
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| Zusammenfassung |
| The objectives of this study were to investigate seasonal variation of
greenhouse gas fluxes from soils on sites dominated by plantation
(Robinia pseudoacacia, Punica granatum, and
Ziziphus jujube) and natural regenerated forests (Vitex
negundo var. heterophylla, Leptodermis oblonga, and
Bothriochloa ischcemum), and to identify how tree species, litter
exclusion, and soil properties (soil temperature, soil moisture, soil organic
carbon, total N, soil bulk density, and soil pH) explained the temporal and
spatial variation in soil greenhouse gas fluxes. Fluxes of greenhouse gases
were measured using static chamber and gas chromatography techniques. Six
static chambers were randomly installed in each tree species. Three chambers
were randomly designated to measure the impacts of surface litter exclusion,
and the remaining three were used as a control. Field measurements were
conducted biweekly from May 2010 to April 2012. Soil CO2 emissions from
all tree species were significantly affected by soil temperature, soil
moisture, and their interaction. Driven by the seasonality of temperature and
precipitation, soil CO2 emissions demonstrated a clear seasonal pattern,
with fluxes significantly higher during the rainy season than during the dry
season. Soil CH4 and N2O fluxes were not significantly correlated
with soil temperature, soil moisture, or their interaction, and no
significant seasonal differences were detected. Soil organic carbon and total
N were significantly positively correlated with CO2 and N2O fluxes.
Soil bulk density was significantly negatively correlated with CO2 and
N2O fluxes. Soil pH was not correlated with CO2 and N2O
emissions. Soil CH4 fluxes did not display pronounced dependency on soil
organic carbon, total N, soil bulk density, and soil pH. Removal of surface
litter significantly decreased in CO2 emissions and CH4 uptakes.
Soils in six tree species acted as sinks for atmospheric CH4. With the
exception of Ziziphus jujube, soils in all tree species acted as
sinks for atmospheric N2O. Tree species had a significant effect on
CO2 and N2O releases but not on CH4 uptake. The lower net
global warming potential in natural regenerated vegetation suggested that
natural regenerated vegetation were more desirable plant species in reducing
global warming. |
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