Evaluación de tres tipos de fertilizantes sobre la producción de biomasa y calidad nutricional del pasto maralfalfa (Pennisetum sp) cosechado a cuatro estadios de crecimiento diferentes

En estos días se viene proclamando en nuestro país sistemas de ganadería en semi confinamiento y confinamiento completo, al mismo tiempo estos sistemas basan gran parte de las dietas ofrecidas a los animales en pastos de corte como lo es el maralfalfa (Pennisetum sp). Hasta el momento se ha especulado mucho sobre este pasto y no hay estudios suficientes que orienten a los productores para que utilicen estos pastos con la mejor calidad y la mayor cantidad posible de biomasa. Por esta razón, se desarrolló esta investigación en un lote de pasto de corte maralfalfa ya establecido ubicado en la finca el mirador, municipio de Montenegro, departamento del Quindío con el fin de evaluar el comportamiento agronómico y nutricional cuando el pasto es manejado bajo diferentes tipos de fertilización. Se ubicaron al azar 16 parcelas demostrativas, donde T1:Fertilización orgánica (FO), T2:Fertilización química (FQ), T3:Fertilización química mas orgánica (FQO), T4:sin fertilización (SF).Cada parcela del experimento se dividió en cuatro subparcelas donde se evaluó la composición nutricional y la producción de forraje a los 40, 50, 60 y 70 días de rebrote. Se utilizo un diseño en bloques completamente al azar con arreglo factorial de 4 x 4 con cuatro repeticiones. Se utilizó el paquete estadístico STATGRAPHICS Plus 5.1, cuando las interacciones fueron significativas (p

Currently the Colombian stockbreeding industry is going through a transition. The trend focuses on producing larger amounts of milk or meat per unit area. Currently, the country uses semi-confinement and complete confinement in its stockbreeding systems. These systems rely on feeding the animals pasture trimmings such as Maralfalfa (Pennisetum sp). Thus far there has been much speculation about the product and not enough studies have been generated to help guide the producers in offering their cattle the best nourishment and the greatest possible amount of biomass. With this in mind, the following research project was conducted on a lot previously prepared with Maralfalfa at a farm located in The Mirador, a town in Montenegro, Quindio. The intention is to evaluate the agronomic and nutritional outcome when the grass is fertilized with organic fertilizer (FO), chemical fertilizer (FQ), a mixture of organic and chemical fertilizers (FOQ), and when no fertilizer is used for treatment (SF). Sixteen sections of grass where chosen through random selection and divided into four parts with each containing four plots. The first four plots were fertilized with semi-liquid bovinaza, the second set was fertilized with chemical fertilizer (urea), the third set was fertilized with compost semi-liquid bovinaza and urea, and the last four plots were not fertilized. The four plots were subsequently divided into four subplots that would be assessed on their nutritional composition and forage production at 40, 50, 60, and 70 days of growth. The assessment of the nutritional and agronomic variables was conducted through a complete randomization design with a split-plot arrangement with four repetitions, where the plot was the treatment and each subplot was the age of growth. All models were evaluated with a statistical package called Statgraphics Plus 5.1 and the interactions that yielded significant results (p

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