Navegação Institutos de Investigación por autor "Bottner, Pierre"
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Decomposition of standard plant material along an altitudinal transect (65-3968 m) in the tropical Andes
Couteaux, M.; Sarmiento, Lina; Bottner, Pierre; Acevedo N., Dimas R.; Thiery, J. (2002)The dynamics of plant decomposition in the soil were analysed in an altitudinal transect from 65 to 3968 m under tropical conditions. Six sites were studied, with a mean annual temperature ranging from 5.5 to 27.4°C, and ... -
Destino del nitrógeno agregado por fertilización en un cultivo de papa en Los Andes de Venezuela
Abreu Araque, Zoraida; Sarmiento, Lina; Bottner, Pierre (Revista de la Facultad de Agronomía de Luz 24(2): 203-228, Venezuela, 2007)Se analizó el destino del N agregado por fertilización mineral en una parcela de papa cultivada con 288 kg ha-1 de N marcado (15N) en los páramos venezolanos y se comparó con el balance de N de una parcela sin fertilizar. ... -
Factors controlling decomposition of soil organic matter in fallow systems of the high tropical Andes: A field simulation approach using 14C- and 15N- labelled plant material
Bottner, Pierre; Pansu, Marc; Sarmiento, Lina; Hervé, Dominique; Callisaya Bautista, Ruben; Metselaar, Klaas (2006)N-rich (C:N ¼ 27) and N-poor (C:N ¼ 130) wheat straw, labelled with 14C and 15N, was incubated for 2 yr in two major ecosystems of the upper elevation belt of cultivation in the high Andes: the moist Paramo (precipitation ... -
Modeling microbial exchanges between forms of soil nitrogen in contrasting ecosystems
Pansu, Marc; Machado Díaz, Daniel; Bottner, Pierre; Sarmiento, Lina (Biogeosciences Discussions, 10(3): 5749-5780, Unión Europea, 2013-03-25)Although nitrogen (N) is often linked to carbon (C) in organic molecules, C is carried from the tmosphere to the soil through plants while N is carried from the soil to plants by microbial transformations. Many schemes ... -
Modeling organic transformations by microorganisms of soils in six contrasting ecosystems: Validation of the MOMOS model
Pansu, Marc; Sarmiento, Lina; Rujano, MA.; Ablan Bortone, Magdiel; Acevedo N., Dimas R.; Bottner, Pierre (Global Biogeochemical Cycles 24, GB1008,doi:10.1029/2009GB003527, Venezuela, 2010-02-26)The Modeling Organic Transformations by Microorganisms of Soils (MOMOS) model simulates the growth, respiration, and mortality of soil microorganisms as main drivers of the mineralization and humification processes of ... -
Modelling the transformations and sequestration of soil organic matter in two contrasting ecosystems of the Andes
Pansu, Marc; Sarmiento, Lina; Hervé, Dominique; Metselaar, Klaas; Bottner, Pierre (European Journal of Soil Science 58(3): 775-785, Europa, 2007-06)The mechanisms linking soil respiration to climate and soil physical properties are important for modelling transformation and sequestration of C and N in the soil. We investigated them by incubating 14C and 15N labelled ...