| Registro completo |
| Provedor de dados: |
Organic Eprints
|
| País: |
Germany
|
| Título: |
Symbiotische Stickstofffixierung in biologisch und konventionell bewirtschafteten Wiesen
|
| Autores: |
Oberson, Astrid
Frossard, Emmanuel
Mayer, Jochen
Flura, Thomas
Mäder, Paul
Lüscher, Andreas
|
| Data: |
2009
|
| Ano: |
2009
|
| Palavras-chave: |
Pasture and forage crops
|
| Resumo: |
Because of lower nitrogen (N) input it is assumed that organically cultivated legumes fix more N2 than legumes grown under conventional cropping. Using the natural 15N abundance method, we assessed symbiotic N2 fixation by white and red clover. The clover was growing in a grass-clover meadow installed as part of the crop rotation of a long term (30 years) field experiment. Dry matter yields were similar for organic and conventional meadows on plots fertilized at levels typical for the respective system, but organic meadows tended to higher clover yields. The proportion of N derived from atmosphere (Ndfa) in both clover species was on average 84%. It was not significantly affected by the cropping system. Because of more legumes, amounts of fixed N2 (Nfix) were higher in organic than conventional meadows. Under low fertilization intensity, low available potassium and phosphorus contents limited Nfix through lower legume dry matter production while Ndfa remained high.
|
| Tipo: |
Conference paper, poster, etc.
|
| Idioma: |
deu
|
| Identificador: |
http://orgprints.org/14215/1/Oberson_14215.pdf
Oberson, Astrid; Frossard, Emmanuel; Mayer, Jochen; Flura, Thomas; Mäder, Paul and Lüscher, Andreas (2009) Symbiotische Stickstofffixierung in biologisch und konventionell bewirtschafteten Wiesen. Paper at: 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009.
|
| Relação: |
http://orgprints.org/14215/
|
| Formato: |
application/pdf
|
|
