Malaysian Applied Biology Journal

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29-1&2-01

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Malays. Appl. Biol. (December 2000) 29(1&2): 1-8

EFFECTS OF PRE-HARVEST PRODUCTION PRACTICES ON POST-HARVEST WATER LOSS OF LEEKS AND PAK CHOI

MAHMUD, T.M.M.1, RAMLAN, M.F.1 and AHMAD, S.H.2

1 Department of Crop Science, 2 Department of Agricultural Technology, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul-Ehsan, Malaysia.

ABSTRACT

The utilization of pre-harvest conditions as crop management tools to control post-harvest weight (water) loss had been studied. Studies on two model crops i.e. leek and pak choi had shown some promising uses of these production conditions in regulating weight loss from harvested leafy vegetable. Pre-harvest conditions such as environmental (temperature and light) and cultural (mineral nutrition, density of planting, salinity and irrigation) had been investigated. Water retention during storage was improved in pseudostems from leeks grown with adequate water supply, high light level, lower temperatures and K supplement in the growing media. Pseudostems from salinized plants conserved more watet than non-salinized plants and leeks grown at 35 plants nr2 retained water better than the other three plant densities (17.5, 22 and 44 plants nr2). There were significant (p<0.001) interactions between temperature, salinity and water stress and cultivars on water loss from shoots of pak choi with shoots produced at 25°C, moderate salinity and water stressed being more resistant to water loss.


ABSTRAK

Kajian terhadap penggunaan keadaan persekitaran sebelum tuai sebagai alat pengurusan tanaman bertujuan untuk mengawal kehilangan berat (air) di peringkat pascatuai telah dijalankan. Kajian terhadap dua jenis sayuran yang dijadikan sebagai model iaitu 'leeks' dan pak choi telah menunjukkan bahawa pengawalan persekitaran pengeluaran tanaman mempunyai potensi untuk digunakan sebagai kaedah bagi mengurangkan kehilangan berat daripada sayuran berdaun setelah dituai. Keadaan persekitaran dan kultur yang berbeza seperti suhu, cahaya, pemakanan mineral, kepadatan tanaman, kemasinan dan pengairan telah dikaji. Ketahanan daripada kehilangan air semasa penyimpanan batang palsu leeks dapat diperbaiki dengan penanaman dengan pengairan yang mengcukupi, paras cahaya yang tinggi, suhu yang rendah dan tambahan kadar K di dalam media tanaman. Batang palsu yang dihasilkan di dalam keadaan kemasinan berupaya untuk mengekalkan kandungan air yang tinggi berbanding dengan tanaman yang dihasilkan tidak dalam keadaan kemasinan. Kepadatan 35 pokok nr2 memberikan hasil yang lebih berupaya untuk mengekalkan kandungannya berbanding dengan kepadatan-kepadatan lain (17.5, 22 dan 44 pokok m-2). Terdapat interaksi yang ketara (p<0.001) antara suhu, kemasinan dan ketegasan air dengan kultivar bagi pucuk pak choi yang dihasilkan dalam suhu 25 °C, kemasinan dan ketegasan air sederhana. Rawatan-rawatan ini di dapati menghasilkan pucuk yang lebih tahan kepada kehilangan air.

Key words: post-harvest, pre-harvest, water loss, leeks and pak choi.

REFERRENCES

Awang, Y.B. 1994. Physiological responses of glasshouse strawberry to salinity: A basis for crop management. Ph.D. Thesis, University of Nottingham. 191 pp.

Baker, E. A. 1974. The Influence of Environment on Leaf Wax Development in Brassica oleracea van. gemmifera. New Phytol, 75(5): 955-966.

Beerling, D. J. and Chaloner, W. G. 1993. The impact of atmospheric C02 and temperature change on stomatal density: Observations from Qliercus robur Lammas leaves. Ann Bot., 71(3): 231-235.

Beyl, C. A. and Mitchell, C. A. 1977. Characterization of mechanical stress dwarfing in Chrysanthemum. J. Amer. Soc. Hon. Sci., 102: 591-594.

Burton, W. G. 1982. Post-harvest Physiology of Food Crops. Longman, London and New York. 339 pp.

Chaves, M. M. and Pereira, J. S. 1992. Water stress. C02 and climate change. /. Expt. Bot., 43(253): 1131-1139.

Everard, J. D., Gucci, R., Kann, S. C., Flore, J. A. and Loescher, W. H. 1994. Gas exchange and carbon partitioning in the leaves of celery (Apium graveolens L.) at various levels of root zone salinity. Plant Physiol., 106: 281-292.

Hassan, I. A., Ashmore, M. R. and Belt J. N. B. 1994. Effects of 03 on the stomatal behaviour of Egyptian varieties of radish (Raphus sativus L. cv Baladey) and turnip (Brassica rapa L. cv Sultani). New Phytol., 128: 243 -249.

Hiraki, Y. and Ota, Y. 1975. The relationship between growth inhibition and ethylene production by mechanical stimulation in Lilium longiflorum. Plant & Cell Physiol., 16: 185-189.

Hofrun, H. 1978. Storage of leeks. 111. Storage in controlled atmospheres. Meldingerfra Norges Landbrukshogskole, 57(38).

Hruschka, H. W. 1978. Storage and shelf life of packaged leeks. USD A Marketing Research Report: 19p.

Jaffe, M. J. and Biro, R. 1979 Thigmo-morphogenesis: The effect of mechanical perturbation on the growth of plants with special reference to anatomical changes, the role of ethylene and interaction with other environmental stresses. In: Stress physiology of crop plants, eds. Mussell, H. and R. Staples. John Wiley, New York: 22-59.

Jordan, W. R., Shouse, P. J., Blum. A., Miller, F. R. and Monk, R. L. 1984. Environmental physiology of sorghum. II. Epicuticular wax load and cuticular transpiration. Crop Sci. 24: 1168-1173.

Kays, S. J. 1991. Post-harvest Physiology of perishable plant products. VanNostrand, Reinhold, New York. 532p.

Lipton, W.J. 1987. Senescence of leafy vegetables. HortScience, 22(5): 854-859. Lownds, N.K., Banaras, M. and Bosland, W. 1994. Postharvest water loss and storage quality of nine pepper (Capsicum) cultivars. HortScience, 29(3): 191-193.

Mengel, K. 1979. Influence of erogenous factors on the quality and chemical composition of vegetables. A eta Hort., 93: 133-151.

Mengel, K and Kirby, E. A. 1987. Principles of Plant Nutrition. International Potash Institute, Bern, Switzerland. 655 pp.

Reed, D. W. and Tukey, H. B., Jr. 1982. Light intensity and temperature effects on epi-cuticular wax morphology and internal cuticle ultrastructure of carnation and Brussels sprouts leaf cuticles. /. Amer. Soc. Hort. Sci., 107(3): 417-420.

Robinson, J. E., Browne, K. M. and Burton, W.G. 1975. Storage characteristics of some vegetables and soft fruits. Ann. Appl. Biol, 81: 399-408.

Strefeler, M. S. and Quene, J. W. 1995. Variability in water loss patterns of New Guinea Impatiens cultivars and breeding selection. J. Amer. Soc. Hort. Sci., 120(3): 527-531.

Xu, H. L., Gauthier, L. and Gosselin, A. 1995. Stomatal and cuticular transpiration of glasshouse tomato plants in response to high solution electrical conductivity and low soil water content. J. Amer. Soc. Hort. Sci., 120(3): 417-422.
 

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