A participative network of organic and conventional crop farms in the Seine Basin (France) for evaluating nitrate leaching and yield performance
Type de document
journalArticle
Langue source
Anglais
Titre français
Titre anglais
A participative network of organic and conventional crop farms in the Seine Basin (France) for evaluating nitrate leaching and yield performance
Auteur(s)
- BENOIT Marie
- GARNIER Josette
- BEAUDOIN Nicolas
- BILLEN Gilles
Editeur(s)
Autre(s)
Id
QB6SCKBR
Version
3021
Date ajout
23 décembre 2020 11:47
Date modification
1 avril 2021 11:03
Résumé anglais
In the Seine Basin, characterized by intensive arable crops, most surface and groundwater is contaminated by nitrate (NO3−). A collaborative study was set up, involving a network of volunteer farmers, to investigate NO3− leaching with ceramic cups (90cm deep) on whole crop rotations of organic (OF) and conventional (CF) commercial farms in the Seine Basin. A total of eight CF and six OF systems were studied (63 fields) in five different soil and climate conditions, taking into account a wide diversity of practices (including low or no exogenous N inputs, systematic catch-crop implementation, and no tillage) and use of different exogenous organic matter (EOM) such as biogas residue; slurry; poultry manure; and cow and horse manure. Over the 2years, OF cropping systems (including alfalfa) led to a lower average sub-root concentration (37±9mgNO3−l−1) than CF systems (48±19mg NO3−l−1, ±standard deviation between farms). The water inflows calculated ranged from 86 to 190mm depending on the year for the 4-month drainage period. The amounts of N leached were on average 23% lower in OF (12.5±2.9kgNha−1yr−1) than in CF systems (16.2±6.3kgNha−1yr−1). Concerning farming practices, the main impacting factors were the use of EOM in fall, the lack of catch crops before spring, and the proportion of legumes in the rotation. Overall, this wide collaborative network highlights good and innovative practices by CF and OF farmers attempting to decrease NO3− in groundwater.
Note
None
CRAW tags
- AB - Modalité bio
- FREDO environnement
- GEO France
- azote
- eau
- pollution
- réseau
- water
WEB tags
- arable crops
- ceramic cups
- conventional systems
- n leaching
- organic farming
Titre de la publication
Agricultural Systems
Volume
148
Pages
105-113
Date caractères
October 1, 2016
Date publication
1 octobre 2016
Doi
10.1016/j.agsy.2016.07.005
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Issn
0308-521X
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