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vol.34 número1Evaluación agronómica y nutricional del pasto Ryegrass Perenne Tetraploide (Lolium perenne) producido en lecherías de las zonas altas de Costa Rica. I. Producción de biomasa y fenologíaEvaluación de la capacidad productiva de Pleurotus Ostreatus con el uso de hoja de plátano (Musa paradisiaca l., cv. Roatan) deshidratada, en relación con otros sustratos Agrícolas índice de autoresíndice de materiabúsqueda de artículos
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Agronomía Costarricense

versión impresa ISSN 0377-9424

Resumen

VILLALOBOS, Luis  y  SANCHEZ, Jorge Ml. Evaluación agronómica y nutricional del pasto Ryegrass Perenne Tetraploide (Lolium perenne) producido en lecherías de las zonas altas de Costa Rica. II. Valor nutricional. Agron. Costarricense [online]. 2010, vol.34, n.1, pp.43-52. ISSN 0377-9424.

Agronomic and nutritional evaluation of perennial tetraploid ryegrass-based pastures (Lolium perenne) in dairy farms on the highlands of Costa Rica. II. Nutritional Value. The nutritional value of perennial tetraploid ryegrass (Lolium perenne)-based pastures was evaluated in four commercial dairy farms in the district of Chicuá, Oreamuno, Cartago (latitude 09°59’, longitude 83°52’, 3090 m of altitude). Samples were taken every 2 months during a one year period in the paddocks ready to be grazed, simulating DM consumption by lactating cows. Average nutritional value was 25.21% CP, 46.26% NDF, 25.57% ADF, 3.29% lignin, 15.40% NFC, 77.95% IVDMD on dry matter basis. Estimated energy content, expressed as TDN, DE, ME, NEL (3X) and NEG, was 61.95%, 2.92, 2.45, 1.53 y 0.92 Mcal.kg-1 of DM, respectively. Nutritional value of perennial ryegrass pastures is affected by season and pasture management, specially as regards the regrowth period of the paddocks. These pastures have a high CP and NFC content, which allows microbial protein production, but also requires supplements rich in NFC to maximize utilization of these nutrients. In general, nutritional value of this pasture grown at altitudes higher than 2500 m in Costa Rica is similar to the same grass species grown in temperate climate regions, where it is native.

Palabras clave : Temperate climate grasses; Lolium perenne; nutritional value; energy content.

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