STUDY ON PROCESSING QUALITY OF SOME POTATO VARIETIES AS INFLUENCED BY GROWING ENVIRONMENT

Abstract

A study was conducted to investigate the influence of growing environment on processing quality of five potato ( Solanum tuberosum L.) varieties (Asterix, Courage, Lady Rosetta, Felsina and Dura) grown at Panchagarh, Dhaka and Munshiganj in Bangladesh during 2017-2018. The experiment consisted of 2 factors: Factor A : Location ( 3 locations) as - P: Panchagarh, D: Dhaka, M: Munshiganj; Factor B : Potato variety (5 varieties) as-V 1 : Asterix, V : Lady Rosetta, V 4 : Felsina, V : Dura. Each varieties from each locations were collected and stored at ambient conditions for 60 days in the laboratory of Sher-e- Bangla Agricultural 5 University, Dhaka-1207. The quality of tubers viz., dry matter percentage, total soluble solids, firmness, weight loss percentage, specific gravity, starch percentage, fleshcolor, chipscolor and chips were made from them was evaluated at varying storage periods. Tubers from Lady Rosetta variety had a high specific gravity (1.0840 g cm -3 ) and dry matter percentage (22.7%) when grown in Panchagarh and a lower specific gravity (1.0413 g cm -3 ) and dry matter percentage (20.8%) when grown in Munshiganj. There was a progressive reduction in specific gravity, dry matter percentage, firmness, crispness with increasing of storage time and increasement in total soluble solid with advancing storage period. Variety with higher dry matter concentration maintained a better quality than variety with a lower dry matter content. It is reasonable to conclude that Lady Rosetta variety can produce tubers with a high dry matter percentage under Panchagarh conditions. In ambient storage the result revealed that the quality parameter of potato such as dry matter percentage, firmness, weight loss percentage, specific gravity slowly decreased upto 40 days after storage (DAS) and thereafter sharply lost this values. So it may be concluded that farmers of Bangladesh can store their potato upto 40 DAS without sacrificing its quality.

2 : Courage, V 3