Studies on Physicochemical and Sensory Attributes of Potatoes Stored During Winter in High-Altitude Cold Desert, Ladakh,
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Studies on Physicochemical and Sensory Attributes of Potatoes Stored During Winter in High-Altitude Cold Desert, Ladakh, India Narendra Singh 1 & Dorjey Angchuk 1 & Manisha Phour 1 O. P. Chaurasia 1
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Received: 1 May 2019 / Accepted: 11 August 2020/ # European Association for Potato Research 2020
Abstract This study assessed the feasibility of providing a regular supply of locally produced potatoes during landlocked winter months in Ladakh region. Potato tubers were stored (January–May) in semi-underground stores where conditions were between 0.2– 13.6 °C and 87–96% relative humidity. Periodical sample analysis was carried out on sensory attributes and the physicochemical attributes firmness, sprouting, pulp temperature, total soluble solutes, sugar level, vitamin B6, dry matter, weight loss and CIPC residue level, to evaluate the quality of the stored potatoes. Pearson’s correlation analysis measured the relationship between various physicochemical attributes that helped improve understanding of potato variability. CIPC residue concentration was within the recommended limit of 30 mg/kg tuber in peeled and unpeeled tubers ranging from 0.02 to 0.12 mg/kg and 0.04 to 3.90 mg/kg, respectively. Tubers stored during extreme winter conditions showed the highest level of total sugar 927 ± 8.54 mg/100 g after 5 months of storage. Vitamin B6 was 0.276 mg/100 g in CIPC treated potato and 0.190 mg/100 g in non-treated potato which is approximately 15% of recommended daily vitamin B6 intake. Based on the results of this study, potatoes stored in zero energy–based semi-underground stores were in good quality after a period of 5 months and suitable for consumption. Keywords Physicochemical attributes . Potato . Semi-underground storage . Sensory
attributes
* Manisha Phour [email protected]
1
Defence Institute of High Altitude Research (DIHAR), Defence Research Development Organisation (DRDO), Leh, Ladakh, India
Potato Research
Introduction Ladakh is situated in the Trans-Himalayan cold arid region of India and is categorized as alpine and high alpine zone. The region is spread across 32–36° N latitude and 75–80° E longitude at an altitude ranging from 2900 to 6000 m above mean sea level (Husaini et al. 2013). It is known to be one of the highest and driest inhabited places in the world. There are wide seasonal fluctuations in temperature, from − 40 °C in winter to + 35 °C in summer, and meagre precipitation ranging from 10 to 30 cm annually, mainly as snow (Humbert-Droz and Dawa 2004; Demenge 2006). Potato (Solanum tuberosum L.) is a versatile and certainly the most valued non-cereal food crop of Leh, Ladakh. The basic recommended quantity, especially of vegetables, for an adult person in high altitude per day, is approximately 140 g potato, 170 g fresh vegetables (more than 20 types) and 60 g onion (Singh and Ahmed 2010). Potato cultivation is only possible during summer months (May to September). The crops are harvested in the months of September and October which are followed by a period of severe cold weather until
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