September 2024
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Livestock Research for Rural Development
The aim of this research was to examine the nutritional value of yacon (Smallanthus sonchifolius) silage using different plant fractions in three mixtures. The study was conducted at the "Cien Años de Soledad" farm (geographic coordinates: 6° 26' 45.49" N and 75° 32' 43.20" W), which is in the municipality of Rionegro, eastern Antioquia (Colombia). A total of eighteen treatments were evaluated in a 3x3x2 factorial design, with three mixtures (inclusion) of the plant components: 100 % stems and leaves (M1), 50 % stem and leaves, and 50 % tubers (M2), and 75 % stems and leaves, with 25 % of tubers (M3); three evaluation times after sealing 15, 25 and 35 days; and the addition or not of lactic acid bacteria. The effect of factors and interactions was evaluated on the content of dry matter, digestibility, crude protein, soluble protein, ether extract, crude fiber, NDF, ADF, sugars, starches, and non-structural carbohydrates by analysis of variance. The silage mixtures of yacon that included proportions of tubers (M2 and M3) showed the best nutritional values in terms of digestibility, fiber, crude and soluble protein, starches, and non-structural carbohydrates (p<0.05). This would suggest that yacon could be a local forage plant with the potential for strategic supplementation of ruminants in the tropical highlands of Colombia and the Andean region.