Abstract

VARGAS NARANJO, Sergio Andrés; ROSERO NOGUERA, Ricardo  and  BARAHONA ROSALES, Rolando. In vitro degradability kinetics of Maralfalfa (Pennisetum sp.) silage withdifferent levels of inclusion and concentration of sugar cane (Saccharum officinarum) vinasse. Ces. Med. Vet. Zootec. [online]. 2015, vol.10, n.2, pp.82-94. ISSN 1900-9607.

The use of additives promote changes in the chemical and structural characteristics of fodders during the silage process. Recent studies have shown that sugar cane vinasse can be utilized as an additive and serve as an important source of substrates which facilitate hydrolysis of the structural components of plant cell wall, increasing DM degradability. The aim of this study was to evaluate the in vitro kinetics of Maralfalfa silage degradability under different levels of inclusion (3, 6, and 9% per kg/FV) and concentration (20, 30, and 40% DM, respectively) of sugar cane vinasse. The DM degradability was determined by the in vitro gas production technique. Data were analyzed using a completely randomized design in a 3 x 3 + 1 factorial arrangement with 5 repetitions. Vinasse inclusion increased in vitro DM degradability compared to the control (59.1 vs. 51.8% after 72 h, respectively; p<0.05). Furthermore, vinasse increased the soluble fraction (A; 14.62% versus 3.68%) and the effective degradability (48.4 versus 47.4%), respectively (p<0.05). We conclude that cane vinasse enhances the in vitro degradability and the nutritional value of silage made from raw materials of low nutritional quality.

Keywords : Chemical composition; effective degradability; gas production; tropical forages.

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