Paper published in a book (Scientific congresses and symposiums)
Vers une révision de la norme de production d'azote de la vache laitière : justification et conséquences sur le taux de liaison
Lambert, Richard; De Toffoli, M.; Dufrasne, Isabelle et al.
2010In Marcoen, Jean Marie; Vandenberghe, Christophe (Eds.) Acte de l'atelier "Nitrate - Eau"
Peer reviewed
 

Files


Full Text
BASElambert.pdf
Publisher postprint (232.69 kB)
Download

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Nitrogen; dairy cows; excretion; soil link rate; Wallonia
Abstract :
[en] Towards a revison of the dairy cow’s standard for nitrogen production: justification and what are consequences for soil link rate of dairy farms. At present, the dairy cow’s standard of nitrogen production in Walloon region is 90 kg per year. This standard is used to calculate the “soil link rate” of farms, a balance between the organic nitrogen to be spread on land and the quantity legally authorized considering grassland and arable land area. This standard is appreciably lower than that fixed by other member states and was criticized by the European Commission during the negotiations having ended in the second program of sustainable nitrogen management. Further to new studies, it seems that the gaseous loss of nitrogen averages in buildings and during the storage is weaker than the 15% value which was used to justify this 90 kg standard. It also seems that there are big differences of average dairy production and average rate of urea according to the agricultural regions and consequently that regional production standards correspond better to the reality. On basis of these mean values, the dairy cow’s annual productions of nitrogen vary between 81 kg per year in grassy region of Fagne and 99 kg per year in Haute Ardenne and in grassy region from Liege. For the Walloon region in general, the average production is 94 kg per year. The adoption of different values of dairy cow’s nitrogen production by region would lead to an increase of 8% of the soil link rate of dairy farms in Haute Ardenne and of 7% in grassy region from Liege and a decrease of 7% in grassy region of Fagne.
Disciplines :
Animal production & animal husbandry
Author, co-author :
Lambert, Richard;  Université Catholique de Louvain - UCL > Departement de Biologie appliquée et des Productions agricoles
De Toffoli, M.;  Université de Louvain - UCL > Biologie appliquée et Productions agricoles
Dufrasne, Isabelle  ;  Université de Liège - ULiège > Département de productions animales > Nutrition des animaux domestiques
Hornick, Jean-Luc  ;  Université de Liège - ULiège > Département de productions animales > Nutrition des animaux domestiques
Stilmant, Didier ;  Université de Liège - ULiège > Sciences agronomiques > Zootechnie
Seutin, Yves;  Centre wallon de Recherches agronomiques (CRA-W) > sections systèmes agricoles
Language :
French
Title :
Vers une révision de la norme de production d'azote de la vache laitière : justification et conséquences sur le taux de liaison
Publication date :
2010
Event name :
Atelier "Nitrate - Eau"
Event organizer :
ULg - Université de Liège
Event place :
Peyresq, France
Event date :
2 au 5 juin 2009
By request :
Yes
Main work title :
Acte de l'atelier "Nitrate - Eau"
Editor :
Marcoen, Jean Marie ;  Université de Liège - ULiège > Département GxABT > Echanges Eau - Sol - Plantes
Vandenberghe, Christophe ;  Université de Liège - ULiège > Département GxABT > Echanges Eau - Sol - Plantes
Publisher :
Presses agronomiques, Gembloux, Belgium
ISBN/EAN :
9782870161036
Pages :
67-71
Peer reviewed :
Peer reviewed
Available on ORBi :
since 23 June 2011

Statistics


Number of views
71 (5 by ULiège)
Number of downloads
86 (3 by ULiège)

Bibliography


Similar publications



Contact ORBi