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.
Pakistani Call girls in Sharjah 0505086370 Sharjah Call girls
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.
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.