Data/hora: 01/06/2024 01:39:45

Provedor de dados: | 21
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