STANDARDIZATION OF HARVESTING STAGE AND PRE-TREATMENT FOR DEHYDRATION OF TENDER JACK

Loading...
Thumbnail Image
Date
2023-11-15
Journal Title
Journal ISSN
Volume Title
Publisher
College of Horticulture, Mudigere, Keladi Shivappa Nayaka University of Agricultural and Horticultural Sciences, Shivamogga
Abstract
The experiment was carried out during 2022-23 at College of Horticulture, Mudigere in laboratory condition. The experiment was laid out in Completely Randomized Design with two objectives viz., to assess the harvesting stage, 45 days after fruit set (DAFS) and 60 DAFS and pre-treatments with potassium metabisulphite (KMS), citric acid (CA) and potassium sorbate (PS) for dehydration of tender jack and to know the effect of packing materials, high density polyethylene (HDPE), low density polyethylene (LDPE), vacuum packing and aluminium laminated polyethylene (ALPE) for 180 days of storage. Among different harvesting stage and pre-treatments, fruits harvested at 60 DAFS and pretreated with KMS (0.3 %) showed significantly better results with respect to physico-chemical properties viz., maximum dry recovery (18.83 %), dehydration ratio (0.24), rehydration ratio (4.93), rehydration moisture (85.05 %), colorimeter value (82.47 L*), TSS (3.27 ⁰B), carbohydrate (13.18 %), crude fiber (3.28 %), protein (2.26 %), ash (1.40 %), overall acceptability score (4.75) and the minimum drying duration (9.08 hrs) and phenol content (32.07 mg GAE/g). Based on the results of experiment-1, treatment T10 (60 DAFS+KMS 0.3 %) and T9 (60 DAFS+KMS 0.2 %) were selected and packed in different packing materials for storage studies. In experiment-II, fruits harvested at 60 DAFS+KMS 0.3 per cent and packed in ALPE showed better storage stability which in turn maintained better physico-chemical and overall sensory score with minimum changes viz., moisture (7.23-7.32 %), colorimeter value (78.45-74.42 L*), texture (342.21-342.09 N), carbohydrates (12.92-12.85 %), crude fiber (2.69-2.64 %), protein (2.37-2.29 %), starch (1.70-1.67 %), fat (0.75-0.60 %), phenol content (34.25-34.13 mg GAE/g), overall acceptability (4.72-4.35 %) and without any microbial growth after 180 days of storage. Based on the results treatment P4 (60 DAFS+KMS 0.3 %+ALPE) is considered as best for dehydration and storage stability of the dehydrated tender jack.
Description
Keywords
Citation
Collections