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| Titel |
Enzyme dynamics in paddy soils of the rice district (NE Italy) under different cropping patterns |
| VerfasserIn |
Claudio Bini, Mandana Nadimi-Goki, Yoichi Kato, Flavio Fornasier, Mohammad Wahsha, Massimo Spiandorello |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250091782
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| Publikation (Nr.) |
 EGU/EGU2014-6093.pdf |
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| Zusammenfassung |
| The recent widespread interest on soil enzymes is due to the need to develop sensitive
indicators of soil quality that reflect the effects of land management on soil and assist land
managers in promoting long-term sustainability of terrestrial ecosystems. The activities of six
important enzymes involved in C, N, P, and S cycling were investigated in a paddy soil from
the Veneto region, Italy, in four different rotation systems (rice-rice-rice: R-R-R;
soya-rice-rice: S-R-R; fallow-rice: F-R; pea-soya-rice: P-S-R) with three replications in April
(after field preparation, field moist condition), June (after seedling, waterlogged soil
condition), August (after tillering stage of rice, waterlogged soil condition) and October
(after rice harvesting, drained soil condition) over the 2012 growing season. Our
results demonstrated that enzyme activities varied with rotation systems and growth
stages in paddy soil. Compared with field moist soil, drained soil condition resulted
in a significant increase (P < 0.05) of β-glucosidase, arylsulfatase, alkaline and
acid phosphatases, leucine aminopeptidase (except of fallow-rice), and chitinase
activities in all rotations, while compared with drained soil, early waterlogging
(in month of June) significantly decreased (P moist soil> late waterlogged>early waterlogged.
There was an inhibitory effect of waterlogging (except P-S-R rotation) for both alkaline
and acid phosphatases due to high pH and redox conditions.
However, the response of enzymes to waterlogging differed with the chemical species and
the cropping pattern. The best rotation system for chitinase, leucine aminopeptidase and
β-glucosidase activity (C and N cycles) proved R-R-R, while for arylsulfatase, alkaline and
acid phosphatases (P and S cycles) it was the S-R-R.
Key Words: enzyme activity, paddy soil, Crop Rotation System, Italy ___
Corresponding Author: Mandana Nadimi-Goki, Tel.: +39 3891356251 E-mail address:
mandy.nadimi@gmail.com |
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