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| Titel |
Nitrate leaching from intensive organic farms to groundwater |
| VerfasserIn |
O. Dahan, A. Babad, N. Lazarovitch, E. E. Russak, D. Kurtzman |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 18, no. 1 ; Nr. 18, no. 1 (2014-01-27), S.333-341 |
| Datensatznummer |
250120261
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| Publikation (Nr.) |
 copernicus.org/hess-18-333-2014.pdf |
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| Zusammenfassung |
| It is commonly presumed that organic agriculture causes only minimal
environmental pollution. In this study, we measured the quality of
percolating water in the vadose zone, underlying both organic and
conventional intensive greenhouses. Our study was conducted in newly
established farms where the subsurface underlying the greenhouses has been
monitored continuously from their establishment. Surprisingly, intensive
organic agriculture relying on solid organic matter, such as composted manure
that is implemented in the soil prior to planting as the sole fertilizer,
resulted in significant down-leaching of nitrate through the vadose zone to the groundwater.
On the other hand, similar intensive agriculture that implemented liquid
fertilizer through drip irrigation, as commonly practiced in conventional
agriculture, resulted in much lower rates of pollution of the vadose zone and
groundwater. It has been shown that accurate fertilization methods that
distribute the fertilizers through the irrigation system, according to plant
demand, during the growing season dramatically reduce the potential for
groundwater contamination from both organic and conventional greenhouses. |
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