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Evaluation of respiration as a tool in predicting internal quality and storability of potatoes

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Abstract

The internal quality of the potato going into storage is an important parameter for proper storage management. Unfortunately, a rapid and accurate estimate of this parameter is not available. Respiration analysis has potential to be such a guide. This paper reports work completed during the 1978–79 storage season comparing respiration analysis with the important storage indicators of maturity, dry matter, invert sugars, harvest injury, bruise susceptibility and weight loss. Harvests were made at biweekly intervals over a ten-week period. Samples were evaluated in the respirometer for ten days, then placed in storage at 6°C for six months. Following storage, respiration and invert sugar analyses were reported. Evaluations of bruise susceptibility were made on each harvest date and bruise evaluation of several different harvesters made on the last date. The treatments with the highest invert sugar content and greatest weight loss also had the highest respiration rates.

Resumen

La calidad interna de los tubérculos de papas que serán almacenados es un parámetro importante para un manejo apropiado del almacenamiento. Desgraciadamente no existe un método lo suficientemente preciso para estimar este parámetro. El análisis de la respiración posee potencial para servir ese propósito. Este informe fué realizado en base a los trabajos finalizados en la estación de almacenamiento de 1978–79 en el que se compararon análisis de respiración con aquellos indicadores importantes de almacenamiento, tales como madurez, materia seca, azúcares reductores, susceptibilidad a daños durante la cosecha y périda de paso.

Durante un período de diez semanas, se efectuaron cosechas sucesivas a intérvalos de dos semanas. Las muestras cosechadas fueron evaluadas en el respirómetro por diez días y luego almacenadas a 6°C por seis meses.

Después del almacenamiento, se hicieron análisis de respiración y de azúcares reductores. Las evaluaciones de susceptibilidad de los tubérculos a daños mecánicos fueron realizadas en cada época de cosecha. En la última fecha de cosecha fue analizado el daño causado a los tubérculos al usar diferentes cosechadoras. Los tratamientos con el contenido mayor de azúcares invertidos y mayor pérdida de peso fueron también aquellos que mostraron una mayor rata de respiración.

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Cooperative investigations of Agricultural Research, the Science and Education Administra tion, U.S. Department of Agriculture and the Idaho Agricultural Experiment Station. Approved for publication as Paper No. 8031 of the Idaho Agricultural Experiment Station.

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Peterson, C.L., Wyse, R. & Neuber, H. Evaluation of respiration as a tool in predicting internal quality and storability of potatoes. American Potato Journal 58, 245–256 (1981). https://doi.org/10.1007/BF02853906

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  • DOI: https://doi.org/10.1007/BF02853906

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