The dairy activity, based on pastures, represents the main source of income for the rural population of the Andes of northern Peru. The objective was to evaluate biomass yield, growth rate, plant height, Crude Protein (CP), Neutral Detergent Fiber (NDF), in vitro digestibility of dry matter (IVDDM) and metabolizable energy (ME) of 22 genotypes of Lolium spp. in three Andean floors (AF) (AF I: 2300 - 2800, AF II: 2801 - 3300 and AF III: 3301 - 3800 masl) in northern Peru. Better biomass (7662 kg dry material (DM) ha-1 year-1) and growth rate (21.0 kg DM ha-1 day-1) showed AF I for Lolium perenne L., however AF III stood out in yield (9,041 kg MS ha-1 year-1) and growth rate (24.8 kg DM ha-1 day-1) for Lolium multiflorum L. The mean ME was 2.61 Mcal kg-1 MS and 2.43 Mcal kg-1 MS for L. perenne and L. multiflorum, respectively. The nutritional values of both varieties are adequate for feedi...

Background: Evaluation of forage resources is vital for the sustainability of livestock farming in the South American Andes, especially under conditions of low water availability for irrigation and acid soils. Methods: We evaluated the productivity and nutritive value of two cultivars of chicory (Cichorium intybus L.) and one of plantain (Plantago lanceolata L.) in three high‐altitude sites (AL) of the northern highlands of Peru: AL‐I: 2300–2800 m.a.s.l, AL‐II: 2801–3300 m.a.s.l. and AL‐III: 3301–3800 m.a.s.l., for 1 year. The parameters evaluated were dry matter yield (DMY), plant height (PH), growth rate (GR) and nutritional value. Results: Plantain achieved the greatest annual DMY (ADMY), PH and GR compared to the two chicory cultivars (9.34, 9.56 and 13.39 Mg ha−1 for Puna II and Sese 100 chicory and Tonic plantain, respectively; p = 0.0019). The greatest ADMY and GR ...

The dairy activity, based on pastures, represents the main source of income for the rural population of the Andes of northern Peru. The objective was to evaluate biomass yield, growth rate, plant height, Crude Protein (CP), Neutral Detergent Fiber (NDF), in vitro digestibility of dry matter (IVDDM) and metabolizable energy (ME) of 22 genotypes of Lolium spp. in three Andean floors (AF) (AF I: 2300 - 2800, AF II: 2801 - 3300 and AF III: 3301 - 3800 masl) in northern Peru. Better biomass (7662 kg dry material (DM) ha-1 year-1) and growth rate (21.0 kg DM ha-1 day-1) showed AF I for Lolium perenne L., however AF III stood out in yield (9,041 kg MS ha-1 year-1) and growth rate (24.8 kg DM ha-1 day-1) for Lolium multiflorum L. The mean ME was 2.61 Mcal kg-1 MS and 2.43 Mcal kg-1 MS for L. perenne and L. multiflorum, respectively. The nutritional values of both varieties are adequate for feedi...

El experimento se realizó en el galpón de la Facultad de Ingeniería en Ciencia Pecuarias. Los animales doble cruce fueron obtenidos, apareando líneas nativas de San Miguel- Santa Cruz (A) por San Marcos- Cajabamba (B) y los animales triples cruces apareando la línea nativa San Miguel, Santa Cruz- San Marcos, Cajabamba (AB) por Ecotipo Cajamarca terminal(C). La alimentación para ambos tratamientos fue a base de alfalfa y concentrado ad libitum. La evolución de los datos a través de las semanas experimentales nos conlleva a concluir que se produce un efecto positivo en los índices productivos pero diferentes en relación a la procedencia del cruce. En el primer grupo, tratándose de animales nativos seleccionados y cruzados, la rusticidad añadida al vigor híbrido consecuencia del cruce, determina mejor respuesta productiva en las primeras semanas de vida, hasta donde el genotipo...

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The productive sustainability of Pennisetum clandestinum in the Peruvian highlands was evaluated through productivity, growth and chemical composition. The effect of the nitrogen (N) rate, organic matter application, and cutting frequency on Kikuyu grass's yield, chemical composition, plant height, and growth rate was investigated. Experimentation followed a randomized block design with split plots. Multivariate analysis of variance (MANOVA) assessed differences across study factors. Applying 120 kg of N ha-1 yr-1 raised the protein yield to 3454.53 kg ha¯¹, with a crude protein (CP) content of 23.54%. Moreover, cypress (Cupressus lusitanica) trees influenced the Kikuyu biomass, producing 19,176.23 kg of dry matter (DM) ha-1 yr-1 at 8.5-11.5 m from the tree base. Organic matter enhanced Kikuyu aboveground biomass. While dry matter production showed no significant difference between 30-...