Seuri, Pentti and Kuisma, Miia (2006) Water discharge and nutrient leaching from organic mixed crop rotation. In: Tamm, Toomas and Pietola, Liisa (Eds.) NJF Report, Nordic Association of Agricultural Scientists, 2 (5), pp. 41-46.
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Summary in the original language of the document
Water discharge and nutrient leaching studies were conducted in an experimental field under organic farming practice for 20 years. The water discharge measurements cover five years out of a six-year crop rotation. The water discharge for the whole year was 1520 m³/ha (=152 mm). More than 2/3 of the total discharge occurred in April-May. The total precipitation for the whole year was 680 mm.
The total amount of N in the drainage runoff was 11.5 kg/ha and the flow-weighted average content 7.5 mg/l. The total amount of P in the drainage runoff was 48 g/ha and the flow-weighted average content 0.031 mg/l. 85 % of the total P was dissolved reactive phosphorus (DPR).
Some preliminary correlation between N leaching and N management was observed, i.e. higher N concentrations in drainage water were found on green fallow after autumn ploughing compared to first-year grass or spring cereal. Variation in the P concentration of the drainage water between the plots seems to be correlated to soil P status rather than P management.
EPrint Type: | Conference paper, poster, etc. |
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Type of presentation: | Paper |
Keywords: | water discharge, leaching, nitrogen, phosphorus, organic farming |
Subjects: | Environmental aspects > Air and water emissions |
Research affiliation: | Finland > Luke Natural Resources Institute > Ecological Production |
Related Links: | http://composit.dimea.se/filebank/files/20060621$193602$fil$3E0m98LDFtlY2BcQ1ePp.pdf |
Deposited By: | Koistinen, Riitta |
ID Code: | 8968 |
Deposited On: | 26 Jul 2006 |
Last Modified: | 12 Apr 2010 07:33 |
Document Language: | English |
Status: | Published |
Refereed: | Not peer-reviewed |
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