Effect of Mineral Fertilisation on Tuber Yield and Quality in Yams ( Dioscorea alata and Dioscorea rotundata )

Folasade Afolabi, Ryo Matsumoto (), Bolanle Akinwande, Bolanle Otegbayo and Asrat Asfaw
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Folasade Afolabi: Department of Food Science and Technology, First Technical University, Ibadan PMB 5015, Nigeria
Ryo Matsumoto: International Institute of Tropical Agriculture, Ibadan PMB 5320, Nigeria
Bolanle Akinwande: Department of Food Science, Ladoke Akintola University of Technology, Ogbomoso PMB 4000, Nigeria
Bolanle Otegbayo: Department of Food Science and Technology, Bowen University, Iwo PMB 284, Nigeria
Asrat Asfaw: International Institute of Tropical Agriculture, Ibadan PMB 5320, Nigeria

Agriculture, 2023, vol. 13, issue 12, 1-14

Abstract: This study assessed mineral fertilisation impact on tuber yield and food quality in yam genotypes— Dioscorea alata and Dioscorea rotundata . Four genotypes, each from D. alata and D. rotundata, were used in field experiments conducted in Ibadan, Nigeria, during the 2017 and 2018 cropping seasons. Experiments were conducted under low soil NPK fertility conditions with and without Fertiliser treatments. Plots subjected to fertiliser treatment received recommended NPK rate for the area. Tuber yield, functional and pasting properties of yam flour, and sensory attributes of pounded yams were collected. The results revealed varying responses of the genotypes to tuber yield and food quality following fertiliser application. Fertiliser application has generally increased fresh tuber yield. However, it had an impact on the flour quality and textural attributes of pounded yams for some genotypes. In genotypes Danacha and TDa0200012, Fertiliser application increased fresh tuber weight by 29.6% and 28.3%, and dry tuber weight by 19.7% and 24.9%, respectively, without compromising tuber quality. This implies that both genotypes exhibited a greater capacity for nutrient uptake and nutrient use efficiency. However, for genotype Ojuiyawo, Fertiliser application effectively increased tuber yield but negatively affected tuber quality. Our results emphasize the importance of assessing the impact of fertilization on tuber yield and quality for each genotype and selecting the appropriate genotype to improve productivity through mineral fertilization. The outcomes of this study have broader applicability in improving yam productivity across sub-Saharan Africa and are useful for sustainable agriculture in yam-growing regions.

Keywords: fertiliser application; sensory evaluation; functional and pasting properties of flour; pounded yam (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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