Grassland N fertilization in humid tropics : production, organic matter decomposition and uptake

Mandret Gilles, Blanfort Vincent. 1997. Grassland N fertilization in humid tropics : production, organic matter decomposition and uptake. In : Proceedings of the XVIIIth international grassland congress = [Actes du XVIIIe congrès international sur les herbages]. Anon. s.l. : s.n., 1-3. International Grassland Congress. 18, Winnipeg, Canada, 8 Juin 1997/19 Juin 1997.

Autre titre : Fertilisation azotée des herbages sous les tropiques humides : production, décomposition de matière organique et absorption

Résumé : Under tropical humid conditions at low altitudes in La Reunion island an experiment was conducted in 1995 to examine the effects of mineral and organic N fertilisation on regrowth of #Chloris gayana#. Mineral fertilisation stimulates the production of leaves for the first 20 days of regrowth. Dry master production was increased of 181 % with the combination of manure plus ammonium nitrate and only 147 % with ammonium nitrate alone. The soil microbial biomass activity, measured after 50 days of regrowth, was increased of 31 % by application of manure, 41 % by ammonium nitrate and 50 % by manure + ammonium nitrate. With organic fertilisation the uptake of N is more important in leaves than in stems.

Mots-clés Agrovoc : Chloris gayana, fertilisation, engrais minéral, engrais organique, repousse, biomasse

Mots-clés géographiques Agrovoc : La Réunion, France

Classification Agris : F04 - Fertilisation
F08 - Systèmes et modes de culture

Auteurs et affiliations

• Mandret Gilles, CIRAD-EMVT-ALFA (FRA)
• Blanfort Vincent, CIRAD-EMVT-ELEVAGE-AGRICULTURE (REU)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/390014/)

Métriques

[ Page générée et mise en cache le 2024-01-27 ]