Response of yam varieties to soil moisture regime in Southwestern Nigeria

Authors

  • Abayomi Eruola University of Agriculture, Abeokuta

DOI:

https://doi.org/10.36253/ijam-1324

Keywords:

crop, evapotranspiration, Penman formula, yield, Actual Water Availability

Abstract

A field experiment was conducted on varietal response of white yam to moisture regime in Abeokuta. The experiment comprised three varieties of yam (Efuru, Ise-osi and Oniyere), three mulching options (grass, polythene and unmulched), and two planting dates (early and late). Treatments were replicated three times using RCBD lay-out. Model for selecting planting date involved relating potential evapotranspiration (PE) to precipitation (P) in the form of 0.1PE<P < 0.5PE, partitioned for attaining optimal planting date into early {T1= ?(P-0.1PE) ? 0} and late {T2 = ?(P-0.5PE) ? 0}, respectively. For humid period defined by P> PE, the physiological parameters and moisture agro-climatic indices measured during phenological stages of yam grown were analyzed with respect to treatments. Result showed that T1 defined as ?(P-0.1PE) ? 10 mm appeared as the best model that significantly (P < 0.05) influenced emergence rate, phenological growth and tuber yield. All yam varieties evaluated were suitable for planting with respect to yield. Efuru and Ise-osi synchronized perfectly with Actual Water Availability and produced good vegetative growth with LAI of 1.08 and 0.91 leading to higher tuber yield of 12 and 11.64 tonnes ha-1, respectively. Grass mulch had tuber yield, 4-6 tonnes ha-1greater than the polythene and unmulched plots in all varieties. Mulching significantly (P< 0.05) increased tuber yield, 6-8 tonnes ha-1than the unmulched. Conclusively, early planting with grass mulch increased tuber yield.

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Published

2021-12-27

How to Cite

Eruola, A. (2021). Response of yam varieties to soil moisture regime in Southwestern Nigeria. Italian Journal of Agrometeorology, (2), 3–14. https://doi.org/10.36253/ijam-1324

Issue

No. 2 (2021)

Section

RESEARCH ARTICLES

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