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- Title
Feed and fuel: the dual-purpose advantage of an industrial sweetpotato.
- Authors
Mussoline, Wendy A; Wilkie, Ann C
- Abstract
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
- Subjects
SWEET potatoes; SWEET potatoes as feed; ETHANOL as fuel; FEEDSTOCK; PLANT roots
- Publication
Journal of the Science of Food & Agriculture, 2017, Vol 97, Issue 5, p1567
- ISSN
0022-5142
- Publication type
Article
- DOI
10.1002/jsfa.7902