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| Titel |
Effects of precipitation on soil acid phosphatase activity in three successional forests in southern China |
| VerfasserIn |
W. Huang, J. Liu, G. Zhou, D. Zhang, Q. Deng |
| 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 ; 8, no. 7 ; Nr. 8, no. 7 (2011-07-18), S.1901-1910 |
| Datensatznummer |
250006050
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| Publikation (Nr.) |
 copernicus.org/bg-8-1901-2011.pdf |
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| Zusammenfassung |
| Phosphorus (P) is often a limiting nutrient for plant
growth in tropical and subtropical forests. Global climate change has led to
alterations in precipitation in the recent years, which inevitably
influences P cycling. Soil acid phosphatase plays a vital role in
controlling P mineralization, and its activity reflects the capacity of
organic P mineralization potential in soils. In order to study the effects
of precipitation on soil acid phosphatase activity, an experiment with
precipitation treatments (no precipitation, natural precipitation and
doubled precipitation) in three successional forests in southern China was
carried out. The three forests include Masson pine forest (MPF), coniferous and
broad-leaved mixed forest (MF) and monsoon evergreen broad-leaved forest
(MEBF). Results showed that driven by seasonality of precipitation, changes
in soil acid phosphatase activities coincided with the seasonal climate
pattern, with significantly higher values in the wet season than in the dry
season. Soil acid phosphatase activities were closely linked to forest
successional stages, with enhanced values in the later stages of forest
succession. In the dry season, soil acid phosphatase activities in the three
forests showed a rising trend with increasing precipitation treatments. In
the wet season, soil acid phosphatase activity was depressed by no
precipitation treatment in the three forests. However, doubled precipitation
treatment exerted a significantly negative effect on it only in MEBF. These
results indicate that the potential transformation rate of organic P might
be more dependent on water in the dry season than in the wet season. A
decrease in organic P turnover would occur in the three forests if there was
a drought in a whole year in the future. More rainfall in the wet season
would also be adverse to organic P turnover in MEBF due to its high soil
moisture. |
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