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American Journal of Potato Research

, Volume 89, Issue 4, pp 269–276 | Cite as

An Experimental Study of Pressure Flattening During Long-Term Storage in Four Russet Potato Cultivars with Differences in At-Harvest Tuber Moisture Loss

  • Henry C. Castleberry
  • Sastry S. JayantyEmail author
Article

Abstract

Pressure flattening is a major concern in long-term commercial potato storage which limits the duration of storage or reduces the quality of stored potatoes. Canela Russet, Centennial Russet, Rio Grande Russet, and Russet Norkotah potatoes were treated to induce moisture loss at room temperature and at 37 °C. These tubers were evaluated after three different durations of storage for pressure flattening, using a ventilated container design. Differences in pressure flattening development occurred within a cultivar as a result of moisture loss treatments as well as among the cultivars. There was no difference in the storage time required for Centennial Russet to pressure flatten beyond USDA grade tolerances when the tubers had 5 % (4.99 %) or less than one percent (0.52 %) weight loss prior to storage. Russet Norkotah tubers that lost less than 1 % (0.37 %) weight could be stored 6 additional weeks before the tubers were out-of-grade compared to those that lost nearly 4 % weight (3.82 %). Preventing moisture loss during harvest and storage may not considerably decrease pressure flattening for some cultivars but may provide additional months of profitable shipping for other cultivars.

Keywords

Solanum tuberosum Potato bruise Pressure flattening Potato storage Canela Russet Russet Norkotah Rio Grande Russet Centennial Russet 

Resumen

El compactamiento por presión es una gran preocupación en el almacenamiento de papa comercial a largo plazo, lo que limita la duración del almacenaje o reduce la calidad de la papa almacenada. Se trataron las variedades Canela Russet, Centennial Russet, Rio Grande Russet, y Russet Norkotah para inducirles pérdida de humedad a temperatura ambiente y a 37 °C. Se evaluaron estos tubérculos después de tres duraciones diferentes de almacenamiento para aplastamiento por presión, usando un diseño de contenedor ventilado. Se presentaron diferencias en el desarrollo del aplanado por presión dentro de una variedad como resultado de tratamientos de pérdida de humedad, así como también entre variedades. No hubo diferencia en el tiempo de almacenamiento requerido para Centennial Russet en aplanamiento por presión mas allá de los grados de tolerancia USDA cuando los tubérculos tuvieron cinco porciento (4.99 %) o menos de uno porciento (0.52 %) de pérdida de peso previo al almacenamiento. Los tubérculos de Russet Norkotah, que perdieron menos del uno porciento (0.37 %) de peso, pudieron almacenarse seis semanas adicionales, antes de que salieran de la calidad estándar, comparados con aquellos que perdieron cerca del cuatro porciento de peso (3.82 %). La prevención en la pérdida de humedad durante la cosecha y el almacenamiento pudiera no disminuir considerablemente el aplanamiento por presión para algunas variedades, pero proporcionaría meses adicionales de envíos con ganancias para otras.

Notes

Acknowledgements

Authors acknowledge Kendall Nye, MountainKing Inc. for contributions in the design of the ventilated container system and Dr. Venu Perla and Elita Castleberry for their help in bruise area and bruise count. This work is partially supported by Colorado Potato Administrative Committee Area II and USDA—ARS grant (Award number 58-3655-0-632).

Disclaimers

None

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Copyright information

© Potato Association of America 2012

Authors and Affiliations

  1. 1.San Luis Valley Research Center, Department of Horticulture and Landscape ArchitectureColorado State UniversityCenterUSA

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