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| Jarosch, KA.; Gunst, Lucie; Dubois, David; Mäder, Paul; Mayer, Jochen. |
| We calculated a phosphorus (P) and potassium (K) balance for the DOK-trial (Therwil, Switzerland) for a 35-years cropping period. In the DOK-trial, three cropping systems (D: biodynamic, O: bioorganic and K: conventional) are maintained on both a full (2) and a halved (1) fertilization level. Additionally, a treatment with no fertilization (N) and mineral fertilization (M; since 1985) are included. Balance inputs included fertilization, deposition, nutrients inputs by seeds, while in the outputs removal of nutrients by harvested plant material and leaching was considered. For P, the balance was positive for treatment M and treatment O2, but negative for the other treatments. The K-balance was positive only for treatment M, while treatments D2, O2 and K2... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil quality; Nutrient turnover. |
| Ano: 2017 |
URL: http://orgprints.org/31861/1/Phosphor-%20und%20Kalium-Bilanzen%20%C3%BCber%2035%20Jahre%20DOK-Versuch.pdf |
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| Mayer, Jochen; Jarosch, KA.; Hammelehle, Andreas; Dubois, David; Gunst, Lucie; Bosshard, C.; Frossard, Emmanuel; Mäder, Paul; Oberson, Astrid. |
| N-balances over 35 years from the DOK trial are presented and combined with Nstock changes in DOK treatments on different fertilisation levels. Results strongly indicate an N efficiency-sustainability dilemma: DOK treatments with a high nitrogen use efficiency (NUE) lose more soil stock N than those with a lower NUE but higher N losses from the system. The biodynamic system showed little advantage in terms of soil N stocks sustainability while the solely mineral fertilised conventional treatment had highest NUE across all inputs including soil N change. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Biodiversity and ecosystem services; Farm nutrient management. |
| Ano: 2017 |
URL: http://orgprints.org/31925/1/Stickstoffbilanzen%20in%20biologischen%20und%20konventionellen.pdf |
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