Effect of Fertilizer Uptake on the Growth and Yield of Two Genotypes of Dioscorea rotundata
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Yam has the advantage of utilizing the nutrient reserve accumulated when the soil is rested. Limited knowledge exists on the nutrient uptake patterns of the D. rotundata grown under field conditions. This study examined the effect of fertilizer application on growth pattern and yield of yam.
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Effect of Fertilizer Uptake on the Growth and Yield of Two Genotypes of Dioscorea rotundata
- 1. www.iita.org I www.cgiar.org Effect of Fertilizer Uptake on the Growth and Yield of Two Genotypes of Dioscorea rotundata By Ifunanya Ngozika Ifezue Yam Breeding Unit, IITA Ibadan Crop Protection Department, University of Ibadan Supervisors Dr. Ryo Matsumoto Dr. Adejumo S.
- 2. www.iita.org I www.cgiar.org Introduction • Yam (D. rotundata) belongs to a monocot class, Dioscoreaceae family and Dioscorea genus (APG11, 2003). • It is most widely cultivated in West Africa where it is the major staple food thus it is an economically important crop (Mignouna et al., 2003).
- 3. www.iita.org I www.cgiar.org • It is the second most important root and tuber crop in the world after cassava in terms of production (Jova et al., 2005; Adegbite et al., 2006). • Inappropriate use of mineral fertilizer is the major form of its unsustainability. Introduction contd.
- 4. www.iita.org I www.cgiar.org • Yam has the advantage of utilizing the nutrient reserve accumulated when the soil is rested. • Limited knowledge exists on the nutrient uptake patterns of the D. rotundata grown under field conditions Objective • This study examined the effect of fertilizer application on growth pattern and yield of yam. Introduction and objective.
- 5. www.iita.org I www.cgiar.org Materials and Methods • Genetic material: ✓ Two genotypes of D. rotundata (DrDRS20and DrDRS58) • Location ✓ IITA, Ibadan (70 26' 17.14''N, 3052'6.85''E) • Experimental design: randomized complete block design, in four replications. • Tuber preparation • Fertilizer application
- 6. www.iita.org I www.cgiar.org • Destructive sampling: Destructive sampling was carried out at 21 days interval • Data collection: ✓ Dry weight of tuber ✓Dry weight of aerial part ✓Total plant biomass • Statistical analysis Materials and Methods contds
- 7. www.iita.org I www.cgiar.org Results and Discussion 0 200 400 600 19-Jul 19-Aug 19-Sep 19-Oct 19-Nov 19-Dec Dryweight(gplant-1) Dry weightof tuber DrDRS020 DrDRS020(+F) DrDRS058 DrDRS058 (+F) Fig. 1: Effect of fertilizer dry weight of tuber (g/plant)
- 8. www.iita.org I www.cgiar.org Fig. 2:Effect of fertilizer on total plant biomass (g/plant) 0 200 400 600 800 19-Jul 26-Jul 2-Aug 9-Aug 16-… 23-… 30-… 6-Sep 13-Sep 20-Sep 27-Sep 4-Oct 11-Oct 18-Oct 25-Oct 1-Nov 8-Nov 15-… 22-… 29-… 6-Dec Total plant biomass (g plant-1) DrDRS020 DrDRS020(+F) DrDRS058 DrDRS058 (+F) Results and discussion contd.
- 9. www.iita.org I www.cgiar.org Fig. 3: Dry weight of aerial part (g/plant) Results and discussion contd.
- 10. www.iita.org I www.cgiar.org Conclusion • Total biomass and dry weight of tubers at 53DAP, 75DAP of DrDRS020 were not significantly affected by increase in fertilizer treatment . • The effect of fertilizer application could improve total dry weight of tuber over time depending on the genotypes. • The effect of fertilizer application has no significant impact on the final yield of total plant biomass.