ONION PROPERTIES CHANGES AS AFFECTED BY DIFFERENT STORAGE CONDITIONS | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 14, Volume 31, Issue 3, July 2014, Page 937-958 PDF (1.48 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2014.98929 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| M. H. Hatem1; S. A. Shehata1; Y. B. AbdEl-hay2; Karima F. AbdEl-Gwad3; B. A Abaker3 | ||||
| 1Agric. Eng. Dept., Fac. of Agric., Cairo University, Egypt | ||||
| 2Veg. Dept., Fac. of Agric., Cairo University, Egypt | ||||
| 3Agric. Eng. Dept., Fac. of Agric.,Zalingei University, Sudan | ||||
| Abstract | ||||
| In the tropics, onion (Allium cepa L.) bulbs are usually stored in shelters under ambient conditions resulting in severe losses. Storage conditions play an important role in affecting the physical, chemical, and biological change of onion bulbs. The objective of this work was to study the properties of onion bulbs as affected by storage conditions. Three different storage conditions were used namely, forced ventilated, natural ventilated and traditional storage systems. The properties of the onion bulbs that to be studied were equatorial and polar diameters, hardness, dry matter, total soluble solids, total carbohydrates. The results indicated that, the average temperature in center of onion pile during the storage period ranged between 16.73 to 28.61 ˚C for the forced ventilated, where it was ranged between 18.18 to 31.03 ˚C for the natural ventilated, while in traditional storage system ranged between 19.52 to 32.93 ˚C. The equatorial and polar diametre change ranged between 69.33-73.44, 68.56-72.78 and 66.22-73.11mm and 53.22-57.11, 55.22-59 and 49-57.56mm for the forced ventilated, natural ventilated and traditional storage system, respectively, and the lowest changes in equatorial and polar diameter were 1.1 and 1.17%, respectively, which recorded in traditional storage system, the highest value of hardness was recorded the onion stored in forced ventilated and natural ventilated (17.20 and 17.07 kgf), respectively. The highest TSS% was obtained in forced ventilated 14.40% and highest mean of dry matter contents recorded when the bulbs stored in natural ventilated and forced ventilated (15.94, 15.89%), respectively, On the other hand, bulbs after 7 months of storage showed highest carbohydrates mean percentage in forced and natural ventilated (8.08 and 8.05%), respectively. | ||||
| Keywords | ||||
| Onion bulbs; temperature; relative humidity; forced ventilation; natural ventilation; equatorial and polar diameters; hardness; total soluble solids; carbohydrates | ||||
| References | ||||
|
A. O. A. C. (1995). Official Methods of Analyses, Kenneth Helrich Ed., 16th ed.
A.O. A. C. (1990). Official Methods of Analysis of Association of Official Agricultural Chemistry. 15th Ed.
Bhatnagar, A.K.; Tyagi, R.P.S. and Bansode, P.C. (1989). Handling, storage and marketing of onion. Dr. Panjabrao Deshmukh Krishi Vidyapeeth Research Journal,13(2): 135-139.
Chope, G.A.; Terry, L. and White, P. (2006). Effect of controlled atmosphere storage on abscisic acid concentration and other biochemical attributes of onion bulbs. Post harvest Biology and Technology 39: 233-242.
Corgan, J.N. and Kedar, N. (1990). Onion cultivation in subtropical climates, p. 31-48. In: H.D. Rabinowitch and J.L. Brewster (eds). Vol 2. Onions and allied crops. CRC Press, Boca Raton, Fla.
Croci, C.A.; Banek, S.A. and Curzio, O.A. (1995). Effect of gamma-irradiation on extending storage and chemical quality of onion (Allium cepa L.). Food Chemistry, 54(2): 151-154.
Currah, L. and Proctor, F. J. (1990). Onion in tropical regions. Natl. Res. Inst. UK. Bul. 35
Kaynas, K.; Besirli, G. and Damgaci, E. (1995). Using of bulk storage system on curing and storage potentials of onion bulbs; Sogan kurutma-olgunlastirma ve muhafazasinda yigin seklinde depolama sisteminin kullanim olanaklari Ataturk Central Horticultural Research Inst., Yalova (Turkey). pp. 32
Magadum, S.B. (1981). Genetic diversity in onion (Allium cepa L.) germplasm with special reference to storage quality. M.Sc. (Agri.) Thesis, Mahatma Phule Krishi Vidyapeeth, Rahuri.
Maini, S.B. and Chakrabarti, A.K. (2000). Postharvest management of onions and garlic. Souvenir, National Symposium on Onion and Garlic Production and Postharvest Management: Challenges and Strategies, 19-21 Nov. 2000, National Research Centre for Onion and Garlic, Rajgurunagar, Nasik, pp. 25-32.
Maw, B. W.; Hung, Y. C.; Tollner, E. W.; Smittle, D. A. and Mullinix, B. G. (1996). Physical and mechanical properties of fresh and stored sweet onions. Trans. ASAE, 39(2), 633–637.
Patil, J.D. and Kale, P.N. (1998). Storage studies in onion. Journal of Maharashtra Agricultural Universities, 12: 114-115.
Patil, R.S. (1983). Genetic variability in respect of storage quality of onion (Allium cepa L.). M.Sc. (Agri.) Thesis, Mahatma Phule Krishi Vidyapeeth, Rahuri.
Patil, R.S. and Kale, P.N. (1988). Biochemical changes during high temperature storage of bulbs of some onion cultivars. Journal of Maharashtra Agricultural Universities, 13(1): 108-109.
Raquel, P. F. and Maria, J. B. (2010). Texture of onions before and after freeze-drying.5th Central European Congress on food,19th-22nd may. Bratislava, Slovake Republic. 1-5.
Rutherford, P.P. (1981). Some biological changes in vegetables during storage. Horticultural Abstracts, 11: 764 (8254).
Saimbhi, M.S. and Randhawa, K.S. (1982). Losses in white onion variety Punjab-48 under ordinary storage conditions as influenced by bulb size. Journal of Research Punjab Agricultural University, 19(3): 188-190.
Satish, S.V. and Ranganna, B. (2002). Effect of curing on the physical and mechanical properties of onion. Mysore Journal of Agricultural Sciences, 36: 266-269.
Singh, J. and Dhankhar, B.S. (1992). Biological changes of onion bulbs during storage as influenced by pre-harvest treatments. Vegetable Science, 19(1): 86-91. | ||||
|
Statistics Article View: 155 PDF Download: 186 |
||||
