The sweet potato has characteristics that qualify it as a source of bioenergy,
although there bottlenecks in the optimization of large-scale crop productivity, this
biomass has great potential for industrial production of ethanol. The objective of
this study was to compare six sweet-potato cultivars with respect to two types of
seedlings with respect to vegetative propagation, one originated from the area of
(branches) and other tuberous root (shoots). We evaluated the overall productivity
of roots and branches, dry matter content of roots and branches, the per hectare
production estimate, the theoretical ethanol yield and the interaction between the
type of changes and the analyzed cultivars. From the flour roots were carried out
chemical analysis quantifying the starch content, crude protein, crude fiber, lipids,
ash and estimated starch productivity per hectare. The results showed sweet
potato genotypes root yield above (85 t ha-1), starch content (66.4%), protein
(3.21%), crude fiber (4,11 %) lipid content (0.95%), ash content (2.66%), starch
productivity (18,13 t ha-1) and ethanol yield (13.14 m3 h-1). The seedlings
originated from sprouting roots had higher productivity of the estaquias of
branches. Cultivars Beatriz, Duda and Marcela were highly promising for ethanol
production on an industrial scale.
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