Effects of Shoot Cutting in Different Growth Stage on Yield of Sweet Potato (Ipomoea batatas L.)
Keywords:
shoot cutting, growth stage, sweet potato, yield potentialAbstract
Shoot cutting of sweet potato as plant materials for growing in the next season is general practice for farmers. This practice may negatively affect yield potential of sweet potato. Therefore, this study was aimed to examine the appropriate growth stages for shoot cutting unaffecting tuber yield of sweet potato. A randomized complete block design (RCBD) with three treatments (growth stage of shoot cutting); establishment (4wks after planting-WAP), storage root initiation (8 WAP) and storage root bulking (12 WAP) compared with no shoot cutting (control), was employed as experimental design with four replications and conducted during September to December 2017 in field plots of Plant Science Section, Phranakorn Si Ayutthaya Province. The results indicated that shoot cutting at different growth stages significantly affected shoot dry weight, tuber yield and tuber size but did not affect leaf area, chlorophyll content, chlorophyll fluorescence and tuber numbers. Shoot cutting at establishment (4 WAP) significantly reduced tuber yield and size but no effect on tuber numbers/rai whereas shoot cutting at the other growth stages did not affect tuber yield. From this study, it can be concluded that cutting of sweet potato shoot at the age more than 4 weeks after planting did not affect yield of sweet potato.
References
Baiano, A., Gianni, A.D., Previtali, M.A., Del Nobile, M.A., Novello,V. and de Palma, L. 2015. Effects of defoliation on quality attributes of Nero di Troia (Vitis vinifera L.) grape and wine. Food Research International 75: 260-269.
Barry, K.M. and Pinkard, E.A. 2013. Growth and photosynthetic responses following defoliation and bud removal in eucalypts. Forest Ecology and Management 293: 9-16.
Buntin, G.D. 1994. Simulated insect defoliation of seedlings and productivity of winter small-grain crops. Journal of Entomological Science 29: 534-542.
Dahniya, M.T. 1979. Defoliation and grafting studies of cassava (Manihot esculenta Crantz) and sweet potatoes (Ipomoea batatas L.). PhD Thesis (Department of Agronomy), University of Ibadan.
Ishiguro, K. and Yoshimoto, M. 2005. Content of the eye-protective nutrient lutein in sweetpotato leaves, pp. 213-214. In Concise Papers of the Second International Symposium on Sweet Potato and Cassava. Kuala Lumpur, Malaysia.
Kiozya, H.C., Mtunda, K., Kapinga, R., Chirimi, B. and Rwiza, E. 2001. Effect of leaf harvesting frequency ongrowth and yield of sweet potato in the Lake Zone of Tanzania. African Crop Science Journal 9: 97-103.
Kirkegaard, J.A., Sprague, S.J., Lilley, J.M., McCormick, J.I., Virgona, J.M. and Morrison, M.J. 2012. Physiological response of spring canola (Brassica napus) to defoliation in diverse environments. Field Crops Research 125: 61-68.
Moran, R. and Porath, D. 1980. Chlorophyll determination in intact tissue using N, N-Demethylformamide. Plant Physiology 65: 478-479.
Munyahali, W., Pypers, P., Swennen, R., Walangululu, J., Vanlauwe, B. and Merckx, R. 2017. Responses of cassava growth and yield to leaf harvesting frequency and NPK fertilizer in South Kivu, Democratic Republic of Congo. Field Crops Research 214: 194-201.
Muro, J., Irigoyen, I. and Lamsfus, C. 1998. Effect of defoliation on onion crop yield. Scientia Horticulturae 77: 1-10.
Nwinyi, S.C.O. 1992. Effect of age at shoot removal on tuber and shoot yields at harvest of five sweet potato (Ipomoea batatas (L.) Lam) cultivars. Field Crops Research 29: 47-54.
Olorunnisomo, O.A. 2007. Yield and quality of sweet potato forage pruned at different intervals for West African dwarf sheep. Livestock Research for Rural Development 19: 1-9.
Owen, L.N., Catchot, A.L., Musser, F.R., Gore, J., Cook, D.C., Jackson, R. and Allen, C. 2013. Impact of defoliation on yield of group IV soybeans in Mississippi. Crop Protection 54: 206-212.
Ruiz, M.E., Pezo, D. and Martinez, L. 1980. The use of sweet potato (Ipomoea batatas (L) Lam) in animal feeding. I. Agronomic aspects. Tropical Animal Production 5: 144-151.
Sun, H.T.M., Zhang, L. Xi, M. and Chen, J. 2014. Sweet potato (Ipomoea batatas L.) leaves as nutritional and functional foods. Food Chemistry 156: 380-389.
Ulas, A., Behrens, T., Wiesler, F. and Horst, W.J. 2015. Defoliation affects seed yield but not N uptake and growth rate in two oilseed rape cultivars differing in post-flowering N uptake. Field Crops Research 179: 1-5.
Zhu, G.X., Midmore, D.J., Radford, B.J. and Yule, D.F. 2004. Effect of timing of defoliation on wheat (Triticum aestivum) in central Queensland. 1. Crop response and yield. Field Crops Research 88: 211-226.
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