Abstract

SILVA-PARRA, Amanda; GARAY-RODRIGUEZ, Seydyss  and  GOMEZ-INSUASTI, Arturo S.. Alnus acuminata Kunth impact on N ₂ O fluxes and quality of Pennisetum clandestinum Hochst. ex Chiov grass. Colomb. for. [online]. 2018, vol.21, n.1, pp.47-57. ISSN 0120-0739.  https://doi.org/10.14483/2256201x.11629.

The Aliso Alnus acuminata Kunth is a forest species of the of the Colombian Andes associated with Kikuyu grass as silvopastoral system (SPS) and fixe atmospheric N. The SPS was compared with 0, 50, 100, 150 and 200 kg N ha-1 year-1 at 30, 45 and 60 days on pasture quality, expressed as green forage (GF), dry matter (DM), percentage of crude protein (% CP) and N absorbed, also fluxes N2O emissions to the atmosphere were evaluated. The SPS exceeded to 0 and 50 kg.N.ha-1 in all variables, less in the N2O emission fluxes that was greater than 0 kg.N.ha-1 (P<0.05), equal to 50 kg.N.ha-1 (P>0.05), and in GF was similar to 100 kg.N.ha-1 (p>0.05). 150 and 200 kg.N.ha-1.year-1 exceeded all the variables to the SSP. A higher GF and DM was achieved at 45 days and %CP at 30 days.

Keywords : global warming; deforestation; forestry; greenhouse gases GHG; pastures productivity..

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