Feed and fuel: the dual-purpose advantage of an industrial sweetpotato.

• Autores: Wendy A Mussoline, Ann C Wilkie
• Localización: Journal of the science of food and agriculture, ISSN 0022-5142, Vol. 97, Nº 5, 2017, págs. 1567-1575
• Idioma: inglés
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• Resumen

  • Background: Sustainable agricultural systems must support nutritional requirements, meet the energy demands of a growing population, preserve environmental resources and mitigate climate change. The sweetpotato (Ipomoea batatas L.) is a high-yielding crop that requires minimal fertilization and irrigation, and the CX-1 industrial cultivar offers superior potential for feed and fuel.; Results: CX-1 had the highest agronomic fresh vine yield (51.5 t ha-1 ), averaged over two cropping seasons, compared with Hernandez (33.7) and Beauregard (21.8) varieties. CX-1 vines were more nutritional than the table varieties, specifically in regard to relative feed value (205), water-soluble carbohydrates (171 g kg-1 dry matter (DM)), total digestible nutrients (643 g kg-1 DM), metabolizable energy (10.2 MJ kg-1 DM) and organic matter digestibility. Their lower fiber and lignin concentrations contributed to their freshness and digestibility throughout maturity. Significantly higher iron concentrations make the CX-1 vines a valuable, low-fat iron supplement for animal feed. The CX-1 roots also showed the highest bioethanol potential (82.3 g ethanol kg-1 fresh root) compared to Hernandez (64.5) and Beauregard (48.1).; Conclusion: The CX-1 industrial sweetpotato is an ideal dual-purpose crop for tropical/subtropical climates that can be utilized as a non-grain-based feedstock for bioethanol production while contributing a valuable, high-yielding nutritional supplement for animal feed. © 2016 Society of Chemical Industry.; © 2016 Society of Chemical Industry.