Effect of regrowth age and time of year on biomass and bromatological quality in grasses used in three agroclimatic zones of Costa Rica
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| Autores: | , , , , , |
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| Formato: | artículo original |
| Estado: | Versión publicada |
| Fecha de Publicación: | 2022 |
| Descripción: | The research work evaluated seven forage species at different regrowth ages, at two times of the year in three different agroclimatic zones of Costa Rica. A treatment design was used with a 7x2x4 factorial arrangement (forage species, time of year and regrowth days) with three repetitions, with 168 experimental units. The biomass (kg MS/ha), concentration of dry matter (%DM), crude protein (%PC), ash (%CE) and ether extract (%EE) were evaluated for each sample. In the higher altitude zone, the grasses of Kikuyuocloa clandestinum (Kikuyo), Lolium perenne (Ryegrass perenne) were evaluated. The ryegrass grass presented the highest content of PC (18.9%) in the dry season at 28 days regrowth (triple interaction, p<0.01), also obtaining the highest EC content (17.0%) in the dry season at 42 days of regrowth (triple interaction, p<0.01). In the intermediate zone, the grass Cynodon nlemfuensis (African star) showed the highest content of DM (36.6%) in the dry season at 28 days of regrowth (doble interaction, p<0.05), and the highest biomass production (5240 kg MS/ha) at 56 days of the rainy season (doble interaction, p<0.05). In the low zone the pastures evaluated were: Brachiaria brizantha cv. Diamantes, Panicum maximum cv. Mombaza, Ischaemum indicum cv. Ratana and Brachiaria brizantha cv. Toledo. The Mombaza grass presents the highest biomass production (11507 kg DM/ha) in the dry season 56 days after regrowth (triple interaction, p<0.05). Finally, Toledo and Ratana pastures showed values of EC of 8.3% and 15.4% in the dry season (double interaction, p<0.05). |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Español |
| OAI Identifier: | oai:portal.ucr.ac.cr:article/50370 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/nutrianimal/article/view/50370 |
| Palabra clave: | pasturas de piso producción de biomasa calidad nutricional alimentación de rumiantes edad de rebrote época del año pastures biomass production nutritional quality ruminant feeding regrowth age time of the year |