[article] 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 | in Grass and forage science > vol.58, n°4 (Décembre 2003) . - pp. 431-449
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