Effect of blanching treatments and dehydration methods on rehydration quality of khejri (Prosopis cineraria) pods
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https://doi.org/10.56093/ijas.v84i9.43439
Keywords:
Blanching, Dehydration, Hedonic rating, Rehydration, Prosopis cinerariaAbstract
The khejri (Prosopis cineraria L. Druce), is a multipurpose leguminous tree of hot arid desert. Its tender pods are utilized for culinary purpose both in fresh and dehydrated conditions without ascertaining its quality aspect. Therefore, the present investigation was carried out to find out the effect of blanching treatments and dehydration methods on rehydration quality of khejri pods. The experiment consists of three methods of drying and six blanching treatments replicated thrice under completely randomised design (CRD). Both tender pods (harvested within 20 days of fruit set at green stage) and mature pods (harvested after 25 days of fruit set at colour turning stage) were taken for the study. Among various methods of drying; sun drying took minimum time (11 hours) while other methods took comparatively longer period for drying. Moreover, recovery per cent of pods did not vary significantly within the drying methods and blanching treatments. In general, tender pods recovery was less compared to matured pods. The rehydration ratio was maximum in pods blanched in hot water (5 min.) followed by control. Among different methods, the rehydration ratio was maximum in shade drying followed by sun drying and the least in tray drier. The storage life of dehydrated pods was more than 52 weeks in blanching treatment than only about 8 weeks in control (un-blanched pods). The appearance of sun dried pods was not good as brownish and grayish colour pods were observed. Whereas in case of pods dried in shade and tray drier were green in colour. The protein content was also higher in pods dehydrated either in shade or in tray drier but the differences among the blanching treatments were non-significant. Thus, it can be concluded that the tender pods dried after blanching in 2 per cent salt solution (5 min.) or blanched in 2 per cent salt solution (5 min.) + 0.1 per cent KMS (potassium metabisulphite) either in shade or in tray drier have overall good acceptability because of retention of green colour, higher protein content, good storage life, better appearance after rehydration, good culinary taste, overall higher hedonic rating and more hygienic conditions than open sun drying.
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References
AOAC 1990. Official Methods of Analysis: Association of Analytical Chemists, 15th Edition. Arlington, Virginia, USA.
Bhandari D S, Govil H N and Hussain A. 1979. Chemical composition and nutritive value of khejri (Prosopis cineraria) tree leaves. Annals of Arid Zone 18: 170–3.
Bhiyama C P, Kaul R N and Ganguli B N. 1964. Studies on lopping intensities of Prosopis cineraria. Indian Forester 90: 19–23.
Gupta A K, Solanki K R and Kackar N L. 1984. Variation for quality of pods in Prosopis cineraria MacBride. Annals of Arid Zone 23(3): 255–8.
Jatarsa D S and Paroda R S. 1981. Prosopis cineraria –An unexploited treasure of the Thar Dersert. Forage Research 7 (1): 1–12.
Khasgiwal P C, Mishra G G and Mittal B M. 1969. Studies of Prosopis spicigera gum. Part I: Physiochemical character. Indian Journal of Pharmacy 31: 148–52.
Nagaraja A. 2002. Development of processing technique in khejri (Prosopis cineraria). CIAH, News Letter 1(2): 4.
Nagaraja A. 2003. Khejri biscuits: A viable products from khejri (Prosopis cineraria) pods. CIAH, News Letter 2(1): 4–5.
Nagaraja A, Saroj P L and Dhandhar D G. 2003. Value added products from desert queen khejri (Prosopis cineraria). (In) 6th Agricultural Science Congress, 13-15 Feb, Bhopal, p 255.
Saroj P L. 2002. Genetic diversity of khejri (Prosopis cineraria) in Thar Desert. SAIC News Letter 12(3): 11.
Saroj PL, Raturi G B, Vashishtha B B and Vishal Nath. 2002. Biodiversity in khejri (Prosopis cineraria) and its utilization in Arid Zone of Rajasthan. (In) Proceeding of National Conference on Resource Conservation and Watershed Management- Technology Options and Future Strategies, CSWCRTI, Dehradun, pp 121–9.
Saroj P L and Nagaraja A. 2006. Khejri (Prosopis cenararia). (In) Advances in Arid Horticulture, Vol. II. Saroj P L and Awasthi, O P (Eds). Pub. International Book Distributing Company Pvt Ltd, Lucknow, pp 267–89.
Srivastava J P and Hetherington J C. 1991. Khejri (Prosopis cineraria): a tree for the arid and semi-arid zones of Rajasthan. International Tree Crop Journal 7(1-2): 1–16. DOI: https://doi.org/10.1080/01435698.1991.9752898
Tewari P. 1993. Prosopis cineraria pods in the human diet. (In) Prosopis species in arid and semi arid zones of India, pp 125–127.
Tewri J C, Pasiecznik N M , Harsh L N and Harris P J C (Eds). The Prosopis Society of India and the Henry Doubleday Research Association of UK.
Vishal Nath, Dwivedi, N K and Singh R S. 1993. Variation in some horticultural traits in Prosopis cineraria in Rajasthan. (In) Prosopis Species in Arid and Semi arid Zones of India, pp 121–4.
Tewri J C, Pasiecznik N M, Harsh L N and Harris P J C (Eds). The Prosopis Society of India and the Henry Doubleday Research Association of UK.
Vishal Nath 2000. Value addition in Arid Horticulture. (In) Proceeding of short course on Changing Scenario in Arid Horticulture. Raturi G B and Saroj P L (Eds). 20–29 September 2000 at CIAH, Bikaner.
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