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1. Verfasser:	Alvaro Rincon Castillo
Format:	Artículo científico
Sprache:	es
Veröffentlicht:	Universidad Nacional de Colombia 2008
Schlagworte:	Agrociencias Pastos forraje biomasa producción intensidad
Online-Zugang:	https://www.redalyc.org/articulo.oa?id=179914077010
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PRODUCCIÓN DE FORRAJE EN LOS PASTOS Brachiaria decumbens cv. AMARGO Y Brachiaria brizantha cv. TOLEDO, SOMETIDOS A TRES FRECUENCIAS Y A DOS INTENSIDADES DE DEFOLIACIÓN EN CONDICIONES DEL PIEDEMONTE LLANERO COLOMBIANO Alvaro Rincon Castillo Gustavo Adolfo Ligarreto Moreno Edwin Garay Agrociencias Pastos forraje biomasa producción intensidad El experimento se desarrolló en un oxisol del Piedemonte Llanero colombiano. Durante el primer año de establecimiento y con un diseño experimental de bloques completos al azar en arreglo de parcelas subdivididas, se evaluaron los pastos B. decumbens cv. Amargo y B. brizantha cv. Toledo, bajo tres frecuencias de defoliación (14, 28 y 42 días) y dos intensidades de defoliación (alta y baja). El área foliar y la biomasa disponible total no presentaron diferencias significativas en los dos pastos, obteniéndose a un promedio de 2,5 y 2.036 kg MS×ha-1 respectivamente. La biomasa residual total fue superior en el pasto Toledo porque con 3.284 kg MS×ha-1, superó ampliamente al pasto Amargo cuya acumulación de biomasa residual fue de 1.944 kg MS×ha-1. La intensidad de defoliación baja, favoreció la producción de forraje disponible y residual de los pastos evaluados. Se presentó una disponibilidad de 2.056 kg MS×ha-1 en la intensidad baja y 1.760 kg MS× ha-1 en la intensidad alta. El forraje residual compuesto en su mayoría por tallos fue de 2.860 kg MS × ha-1 en la intensidad baja y de 2.216 kg MS×ha-1 en la intensidad alta. Cuando la defoliación se realizó a los 14 días, los pastos presentaron buen contenido de proteína (12,9%) pero la disponibilidad de biomasa fue baja ( 714 kg MS×ha-1), en tanto, a los 42 días se alcanzó a 2.760 kg MS×ha-1 con una proteína de 9,8%. Los nutrientes de reserva en los dos pastos en su mayoría estuvieron conformados por azucares solubles, los cuales se acumularon en más cantidad en los tallos y el contenido más elevado se encontró a los 28 días de rebrote. 2008 artículo científico 0304-2847 https://www.redalyc.org/articulo.oa?id=179914077010 es http://www.redalyc.org/revista.oa?id=1799 Revista Facultad Nacional de Agronomía - Medellín application/pdf Universidad Nacional de Colombia Revista Facultad Nacional de Agronomía - Medellín (Colombia) Num.1 Vol.61

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