Effect of Seedbed Types and time of Vine Harvesting on Shoot and Tuber Yields of Sweet Potato [Ipomoea batatas (L.) Lam.] in South-south, Nigeria

Main Article Content

Lesi Dike Gbaraneh
Victoria Wilson


A field experiment was conducted at Rivers Institute of Agricultural Research and Training (RIART), Rivers State University, Port Harcourt, Nigeria with the objective of evaluating the influence of seedbed types and vine harvesting time on shoot and tuber yields of sweet potato and make recommendations for optimal and sustainable production. The treatments consisted of three seedbed types (ridge, flat, and mound), and four vine harvesting time (8, 12, 16 and 20 weeks after planting). The experiment was laid out as a 3 x 4 in factorial arrangement fitted into a randomized complete block design (RCBD) and replicated three times. The results revealed that planting of sweet potato on ridge produced the highest root tuber yield followed by mound seedbeds; planting on flat seedbed produced the highest shoot (vine) and lowest tuber yields. While planting on ridge seedbed and harvesting the vines 16 weeks after planting (when about 80% of the growth phase of the plant was completed) produced optimum shoot yield which could be used as fodder with no significant effect on root tuber yield. In general, vine harvesting during active growth phase of the sweet potato plant seriously depressed tuber yield more than it affected shoot production. These results therefore stand as our recommendations for sweet potato production in the South-south zone of Nigeria.

Sweet potato, seedbed types, shoot (vine) yield, root tuber yield, dry matter weight

Article Details

How to Cite
Gbaraneh, L. D., & Wilson, V. (2021). Effect of Seedbed Types and time of Vine Harvesting on Shoot and Tuber Yields of Sweet Potato [Ipomoea batatas (L.) Lam.] in South-south, Nigeria. Journal of Experimental Agriculture International, 43(2), 9-20. https://doi.org/10.9734/jeai/2021/v43i230640
Original Research Article


Mbanaso EO. Adoption and dis-adoption of sweet potato Production and processing technologies by farmers in South-Eastern Nigeria. Ph.D thesis, department of agricultural extension, University of Nigeria, Nsukka. 2010;1-104.

Laban TF, Peace K, Robert M, Maggiore K, Hellen M, Muhumuza J. Participatory agronomic performance and sensory evaluation of selected orange-fleshed sweet potato varieties in south western Uganda. Global Journal of Science Frontier Research. 2015;15:25-30.

Gonzalez C, Diaz I, Vecchionacce H, Ly J. Performance traits of pigs fed sweet potato (Ipomoea batatas L.) foliage ad libitum and graded levels of protein. Livestock research for rural development. 2003;9-15.

Giang HH, Ly LV, Ogle B. Digestibility of dried and ensiled sweet potato roots and vines and their effect on the performance and economic efficiency of FI cross bred fattening pigs. Livestock Research for Rural Development. 2004;6-7.

Getachew A, Roger CM, Tilahun S. Increasing food security through improved goat production: a progress report of a UNICEF funded International Development Psartnership between Langston University and Alemaya University. In: R.C. Merkel, G. Abebeand A.L. Goetsh (eds). The opportunities and challenges of enhancing goat production in east Africa. Proceedings of a conference held at Debub University, Awassa, Ethiopia from November 10-12 E (Kika) de la Garza institute for goat research, Langston University, Langston, Ok. 2000;118-126.

Tesfaye K, Tesfaye L, Estifanos T, Mieso G. Effect of level of substitution of sweet potato (Ipomoea batatas L.) vines for concentrate on body weight gain and carcass characteristics of browsing Arsi-Bale goats. J. Cell Anim. Biol. 2008;2(2): 036-042.

Okonkwo JC, Amadi CO, Nwosu KI. Potato production, storage, processing and utilization in Nigeria. National Root Crops Research Institute, Umudike, Nigeria. 2009;67-69.

Udemezue JC. Profitabilities and Constraints to Sweet Potato Production in Nigeria. Current Trends Biomedical Engineering & Bioscience. 2019;19(2): 556007. DOI: 10.19080/CTBEB.2019.19.556007.

Adeyonu A, Balogun O, Ajiboye B, Oluwatayo IB, Otunaiya AO. Sweet potato production efficiency in Nigeria: Application of data envelopment analysis. AIMS Agriculture and Food. 2019;4(3):672-684. DOI: 10.3934/agrfood.2019.3.672

Larbi A, Etela L, Nwokocha HN, Oji UI, Anyanwu NJ, Gbaraneh LD, Anioke SC, Balogun RO, Muhammad IR. Fodder and Tuber yields and Fodder quality of sweet potato cultivars at different maturity stages in the West African humid forest and savanna zones. Animal. Feed. Sci. Technol. 2007;135:126-138.

Lebot V. Tropical root and tuber crops: cassava, sweet potato, yams and aroids CAB International publishers. 413p. Leon-Verlarde CU. Using competing traits to select dual-purpose sweet potato in native germplasm. International Potato Centre (CIP), Lima, Peru. 2009;89-294.

Aina PO. Effect of tillage, seed bed configuration and mulching on soil physical properties. Journal of Agriculture Sciences. 2002;10:26-31.

Lal R. Managing the soils of sub-Saharan Africa. Science. 1987;236:1069-1076.

Agbede TM, Adekiya AO. Tillage effects on soil properties and performance on an alfisol in south-western Nigeria. American – Eurasian J. Sustain. Agric. 2009;3(3): 561-568.

Van Vugt D, Franke AC. Exploring the yield gap of orange-fleshed sweet potato varieties on smallholder farmers’ fields in Malawi. Field Crops Research. 2018; 221:245–256.

Ahmed M, Nigussie-Dechassa R, Abebie B. Effect of planting methods and vine harvesting on shoot and tuberous root yields of sweet potato [Ipomoea batatas (L.) Lam.] in the Afar region of Ethiopia. African Journal of Agricultural Research. 2012;7(7):1129-1141. DOI: 10.5897/AJAR11.894

Chagonda I, Mapfeka RF, Chitata T. Effect of Tillage Systems and Vine Orientation on Yield of Sweet Potato (Ipomoea batatas L.). American Journal of Plant Sciences. 2014;5:3159-3165. Available;http://dx.doi.org/10.4236/ajps.2014.521332

Dumbuya G, Sarkodie-Addo J, Daramy MA, Jalloh M. Growth and yield response of sweet potato to different tillage methods and phosphorus fertilizer rates in Ghana. Journal of Experimental Biology and Agricultural Sciences. 2016;4(5):475.483

Mu’azu A. Growth and development of sweet potato as influenced by NPK fertilizer rates intra-row spacing and seed bed types in the northern guinea savanna. Gashua Journal of Irrigation and Desertification Studies. 2016;2;1:109-115.

Ravindran CS, Mohankumar CR. Effect of method of land preparation and depth of planting on yield of sweet potatoes. In: Ramanujam, T., S. P. Ghosh, J. S. Jos, S. M. Morrthy and R. G. Nair (Eds.), Tropical Tuber Crops Production and Utilization. In: Proceedings of the National Symposium on Production and Utilization of Tropical Tuber Crops, 27-29 November, Central Tuber Crops Research Institute, Trivandrum, India. 1985;129-133.

Midmore DJ. Potato production in the tropics. In: P.M. Harris (Ed.). The potato Crop. The Scientific Basis for Improvement, second edition. Chapman and Hall, in Press; 1991.

Kiozya HC, Mtunda K, Kapinga R, Chirimi B, Rwiza E. Effect of leaf harvesting frequency on growth and yield of sweet potato in the Lake Zone of Tanzania. African Crop Science Journal. 2001;9(1): 97-103. DOI:10.4314/acsj.v9i1.27629

An LV, Frankow-Lindeberg BE, Lindeberg JE. Effect of harvesting interval and defoliation on yield and chemical composition of leaves, stems, and tubers of sweet potato (Ipomoea batatas (L) Lam) cultivars. Field crops Research. 2003; 82(1):49-85.

Busha A. Effect of N and P Application and Seedbed Types on Growth, Yield and Nutrient Content of Sweet Potato [Ipomoea batatas L. (Lam)], Grown in West Wollega. M.Sc. Thesis presented to the School of Graduate Studies of Haramaya University. 2006;87.

Nedunchezhiyan M, Byju G, Ray RC. Effect of Tillage, Irrigation, and Nutrient Levels on Growth and Yield of Sweet Potato in Rice Fallow. International Scholarly Research Notices; 2012. Available:https://doi.org/10.5402/2012/291285

Ruiz ME, Pezo D, Martinez L. The use of sweet potato [Ipomoea batatas (L) Lam] in animal feeding. I. Agronomic aspects. Trop. Animal Prod. 1980;5(2):144-151.

Olorunnisomo OA. Yield and quality of sweet potato forage pruned at different intervals for West African dwarf sheep. Livestock Research for Rural Development. 2007;19(3).

Anikwe MAN, Mbah CN, Ezeaku PI, Onyia VN Tillage and plastic mulch effects on soil properties and growth and yield of cocoyam (Colocasia esculenta) on an ultisol in south-eastern Nigeria. Soil & Tillage Research. 2007;93:264–272.

Nwinyi SCO. Effect of age of shoot removal on tuber and shoot yields at harvest of five sweet potato (Ipomoea batatas (L) Lam.) cultivars. Field crops Research. 1992;29(1):47-54.

Stathers T, Namanda S, Mwanga ROM, Khisa G, Kapinga R. Manual for Sweet Potato Integrated Production and Pest Management for Farmer Field Schools in Sub-Saharan Africa. International Potato Centre, CIP, Kampala. 2005;31. ISBN: 9970-895- 01-x.

Nguyen BL, Bautista OK. Extent and mechanism of yield reduction in sweet potato grown for tops and roots. Philos. Agric. 1999;82:137–150.

Etela I, Oji UI, Kalio GA, Tona GO. Studies on sweet potato forage and dried brewers’ grains as supplements to green panic for Bunaji cows. Tropical Grasslands. 2008; 42:245-251.

Lugojja F, Ogenga-Latigo MW, Smith NEJM. Impact of defoliation on the agronomic performance of sweetpotato in Uganda. Afri. Crop Sci. J. 2001;9:103-108.