Forage selection by cattle in heterogeneous pastures in Nicaragua
Por: Aastum, M.I
| Norwegian University of Science and Technology, Trondheim (Noruega) | CATIE - Centro Agronómico Tropical de Investigación y Enseñanza Turrialba, Costa Rica [autor/a].
Editor: Trondheim, Noruega NTNU Innovation and Creativity 2006Descripción: 41 páginas : figuras, tablas.Tema(s): GANADO | RAZAS MIXTAS | ALIMENTACION DE LOS ANIMALES | TIERRAS DE PASTOS | FORRAJES | VARIEDADES | ELECCION DE ESPECIES | DEFICIENCIAS NUTRITIVAS | NICARAGUA | -- NicaraguaRecursos en línea: eng Nota de disertación: Tesis (Mag.Sc.) - Norwegian University of Science and Technology (Noruega), 2006
Resumen: Three paddock types differing in soil nutrient content and grazing pressure were studied, i.e. nutrient poor (NP) paddocks with high and low grazing pressure, and nutrient rich (NR) paddocks with low grazing pressure. In each paddock the floristic composition of diets, cow tansects and control transects were measured, and the proportion of each species in the diet and in the transects was calculated. Additionally, an index of selectivity (IS) was calculated from this data.This study indicates that the cows in the nutrient poor paddocks were not excessively selective in their choice of forage, probably due to low abundance of preferred species, and realtively high abundance of species of low forage quality. Further, the utilization of the paddocks are probably not the most advantageous, as a relatively large proportion of the species were avoided in both the diet and the feeding sites, and quite few species were avoided in both the diet and the feeding sites, and quite few species were selected in both.
| Tipo de ítem | Ubicación actual | Colección | Signatura | Estado | Fecha de vencimiento | Código de barras |
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Biblioteca Conmemorativa Orton | Colección de Tesis | Thesis A115 (Navegar estantería) | Disponible | BCO20118942 | |
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Biblioteca Conmemorativa Orton | Colección de Tesis | Thesis A115 (Navegar estantería) | Disponible | 107327 |
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Tesis (Mag.Sc.) - Norwegian University of Science and Technology (Noruega), 2006
Incluye 62 referencias bibliográficas en las páginas 40-43
Three paddock types differing in soil nutrient content and grazing pressure were studied, i.e. nutrient poor (NP) paddocks with high and low grazing pressure, and nutrient rich (NR) paddocks with low grazing pressure. In each paddock the floristic composition of diets, cow tansects and control transects were measured, and the proportion of each species in the diet and in the transects was calculated. Additionally, an index of selectivity (IS) was calculated from this data.This study indicates that the cows in the nutrient poor paddocks were not excessively selective in their choice of forage, probably due to low abundance of preferred species, and realtively high abundance of species of low forage quality. Further, the utilization of the paddocks are probably not the most advantageous, as a relatively large proportion of the species were avoided in both the diet and the feeding sites, and quite few species were avoided in both the diet and the feeding sites, and quite few species were selected in both.
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