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| Titel |
Managing soil nitrate with cover crops and buffer strips in Sicilian vineyards |
| VerfasserIn |
A. Novara, L. Gristina, F. Guaitoli, A. Santoro, A. Cerda |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 4, no. 2 ; Nr. 4, no. 2 (2013-08-09), S.255-262 |
| Datensatznummer |
250084932
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| Publikation (Nr.) |
 copernicus.org/se-4-255-2013.pdf |
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| Zusammenfassung |
| When soil nitrate levels are low, plants suffer nitrogen (N) deficiency but
when the levels are excessive, soil nitrates can pollute surface and
subsurface waters. Strategies to reduce the nitrate pollution are necessary
to reach a sustainable use of resources such as soil, water and plant. Buffer
strips and cover crops can contribute to the management of soil nitrates, but
little is known of their effectiveness in semiarid vineyards plantations. The
research was carried out in the south coast of Sicily (Italy) to evaluate
nitrate trends in a vineyard managed both conventionally and using two
different cover crops (Triticum durum and Vicia sativa
cover crop). A 10 m-wide buffer strip was seeded with Lolium perenne
at the bottom of the vineyard. Soil nitrate was measured monthly and
nitrate movement was monitored by application of a 15N tracer to a
narrow strip between the bottom of vineyard and the buffer and non-buffer
strips. Lolium perenne biomass yield in the buffer strips and its
isotopic nitrogen content were monitored. Vicia sativa cover crop
management contributed with an excess of nitrogen, and the soil management
determined the nitrogen content at the buffer areas. A 6 m buffer strip
reduced the nitrate by 42% with and by 46% with a 9 m buffer
strip. Thanks to catch crops, farmers can manage the N content and its
distribution into the soil over the year, can reduced fertilizer wastage and
reduce N pollution of surface and groundwater. |
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