Influence of compression forces of potato tubers during storage on storage losses
Zbigniew Czerko
z.czerko@ihar.edu.plZakład Przechowalnictwa i Przetwórstwa Ziemniaka, Instytut Hodowli i Aklimatyzacji Roślin — PIB, Oddział Jadwisin (Poland)
Magdalena Grudzińska
Zakład Przechowalnictwa i Przetwórstwa Ziemniaka, Instytut Hodowli i Aklimatyzacji Roślin — PIB, Oddział Jadwisin (Poland)
Abstract
The aim of the experiment was to evaluate the storage losses and increase of after damaged necrosis on stored tubers subjected to compression forces. Before storing the tubers of 3 varieties: Flaming, Eland and Almera were placed in tubes with a diameter of 6 cm and a height of 60 cm in the following combinations: damaged, no healing, without compression; damaged without healing, compression force of 60 N; damaged, with healing, compression force of 60 N. Tubes were placed in storage at 8°C. After 6 months of storage following parameters were evaluated: surface of pressure-bruise, natural losses, the length and number of sprouts, the size of the external and internal damages. Pressure-bruises were observed on tubers of all tested varieties. The average area of pressure-bruise was 382 mm2.Thermal and moisture conditions effected on the amount of pressure — bruise. The pressure — bruise occurred on tubers were significantly different between studied cultivars. Way of tuber healing had no effect on the pressure — bruise. Tuber necroses, caused by internal and external damaged have increased in all varieties after storage. Necrosis area significantly differed between varieties — in the variety Almera was 31.8 mm2, in variety Flaming 73.4 mm2. The thickness of necrosis caused of crushing of tubers after storage was from 1.2 mm in a cultivar Almera to 4.1 mm in cultivar Flaming. The thickness of necrosis did not depend on compression force but only on the way of wound healing. The level of natural losses was higher in potatoes not compressed, which were not subjected to the healing period. Compression force had an effect on tuber sprouting. After storing more sprouts were observed in potatoes not healed and compressed than in compressed but healed.
Keywords:
damage, potato, pressure-bruise, storage lossesReferences
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Authors
Zbigniew Czerkoz.czerko@ihar.edu.pl
Zakład Przechowalnictwa i Przetwórstwa Ziemniaka, Instytut Hodowli i Aklimatyzacji Roślin — PIB, Oddział Jadwisin Poland
Authors
Magdalena GrudzińskaZakład Przechowalnictwa i Przetwórstwa Ziemniaka, Instytut Hodowli i Aklimatyzacji Roślin — PIB, Oddział Jadwisin Poland
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