Caracterización Físico Química y determinación In Vitro del valor nutritivo del Rye Grass y del Pasto Azul de diferentes pisos altitudinales para la alimentación del cuy (Cavia porcellus)

Abstract

We evaluated the rye grass and blue grass at different heights for power the guinea pig, through the proximate analysis, cell walls, physical properties of the fiber and in vitro digestibility through two methods. According to the analysis the Rye grass to 2900 m is the most nutritious with a 11.3 % of true protein, 39.4 % of ELN and the lowest crude fiber content (27.9 %), in the blue grass this tendency is most evident, still to 2900 m, highest in true protein and NNE (14.05 and 36.7 per cent) and lowest in crude fiber with 29.62 %. With regard to cell walls can be seen that the rye grass to 2900 m, reported lower values of NDF, ADF and ADL (56.2 , 34.9 and 6.8 respectively) and the most high in nutrients, which indicates lower fiber content and higher digestibility at this altitude. In the blue grass data are more heterogeneous, however as the lignin less than 2900 m, and considering that it is considered as an indicator of digestibility, we assume higher digestibility of the blue grass at this altitude. In regard to the physical chemical properties of the fiber of the rye grass, it was found that grown to 2900 m presented better solubility values and bufferante capacity, while for the water absorption was greater than 2700 m; in the blue grass the solubility, the ability to absorb water and the buffer capacity acid and basic were higher than 2900 m with values of 25.6 %, 6,9 , 0.4 and 0.38 meq respectively. The digestibility was superior to both pastures to 2900 masl, both by the method of the cecal liquor, as by the enzymatic method.