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Effects of cutting or grazing grass swards on herbage yield, nitrogen uptake and residual soil nitrate at different levels of N fertilization / F. Nevens in Grass and forage science, vol.58, n°4 (Décembre 2003)
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Titre : Effects of cutting or grazing grass swards on herbage yield, nitrogen uptake and residual soil nitrate at different levels of N fertilization Type de document : Livre Auteurs : F. Nevens, Auteur ; D. Rehuel, Auteur Année de publication : 2003 Article en page(s) : pp. 431-449 Langues : Anglais Catégories : [habitats/milieux] 3 - Landes, fruticées et prairies
[Thèmes] Pédologie (sol)Mots-clés : gestion pâturage fauchage Résumé : "On a Flemish sandy loam soil, cut and grazed swards were compared at different levels of mineral nitrogen (N) fertilization. Economically optimal N fertilization rates were 400 (or more) and 200 kg N ha−1 yr−1 on cut and grazed swards respectively. Considering the amounts of residual soil nitrate-N in autumn, these N rates also met the current Flemish legal provisions, i.e. no more than 90 kg ha−1 nitrate-N present in the 0–90 cm soil layer, measured between 1 October and 15 November. The N use efficiency was considerably higher in cut grassland systems than in grazed systems, even when the animal component of a cut and conservation system was included. The results indicate that, for cut grasslands, two N application rates should be considered: intensively managed grasslands with high amounts of N (400 kg ha−1 yr−1 or more) or extensively managed grasslands with white clover and no more than 100 kg N ha−1 yr−1." (source : auteurs) Type de publication : périodique Référence biblio : Nevens F., Rehuel D., 2003 - Effects of cutting or grazing grass swards on herbage yield, nitrogen uptake and residual soil nitrate at different levels of N fertilization. Grass and forage science, 4 : 431-449. ID PMB : 58011 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=58011
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