Abstract
Cowpea cultivation is widespread in West Africa where it is an important source of protein. This study is aimed at determining the effects of water deficit applied at different stages of cowpea development on yield and its components (pod number, seed number, seed yield, aerial biomass yield, harvest index and root biomass of the plant). The experiments were carried out in pots during the rainy season of 2016 under natural conditions of illumination, temperature and relative humidity. Three water regimes were applied to plants at different stages of cowpea development: total suspension of watering at flowering phase (43 days after sowing) (S1); suspension of watering at the beginning of pod formation on the 46th day after sowing (S2); and normal watering as control until harvest (S0). At the water regime level, yield components had higher values in S0 followed by S2. The lowest values were obtained at S1 level. The root to aerial biomass ratios was higher under water deficit than in the control. In conditions of water deficiency, Suvita2, IT96D-610, and ISV128 genotypes gave the highest seed yields and Tiligré the lowest yield. The harvest index showed a genotypic variation according to the water regime. Suvita2 and ISV128 gave the best harvest index in all water regimes. This study may have contributed to the selection of genotypes adapted to drought. Key words: Cowpea, harvest index, water deficit, yields, Niger.
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Claims 7
Claim · model-written summary
Yield components were highest under normal watering, followed by deficit at pod formation.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- suspension of watering at the beginning of pod formatione2
- Outcome
- yield componentse0
- Direction
- highere0
- Comparator
- normal wateringe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At the water regime level, yield components had higher values in S0 followed by S2.”
e1“normal watering as control until harvest (S0)”
e2“suspension of watering at the beginning of pod formation on the 46th day after sowing (S2)”
t0“cowpea (Vigna unguiculata L. Walp)”
Claim · model-written summary
Yield components were lowest when watering stopped at flowering.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- total suspension of watering at flowering phasee2
- Outcome
- yield componentse1
- Direction
- loweste0
- Comparator
- normal wateringe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The lowest values were obtained at S1 level.”
e1“yield components”
e2“total suspension of watering at flowering phase (43 days after sowing) (S1)”
e3“normal watering as control until harvest (S0)”
t0“cowpea (Vigna unguiculata L. Walp)”
Claim · model-written summary
Root to aerial biomass ratio was higher under water deficit than control.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- water deficite0
- Outcome
- root to aerial biomass ratiose0
- Direction
- highere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root to aerial biomass ratios was higher under water deficit than in the control.”
t0“cowpea (Vigna unguiculata L. Walp)”
Claim · model-written summary
Suvita2, IT96D-610 and ISV128 had the highest seed yields under water deficiency.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- Suvita2, IT96D-610, and ISV128e0
- Outcome
- seed yieldse0
- Direction
- higheste0
- Qualifier
- water deficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In conditions of water deficiency, Suvita2, IT96D-610, and ISV128 genotypes gave the highest seed yields”
t0“cowpea (Vigna unguiculata L. Walp)”
Claim · model-written summary
Tiligré had the lowest seed yield under water deficiency.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- Tiligrée0
- Outcome
- yielde0
- Direction
- loweste0
- Qualifier
- water deficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In conditions of water deficiency, Suvita2, IT96D-610, and ISV128 genotypes gave the highest seed yields and Tiligré the lowest yield.”
t0“cowpea (Vigna unguiculata L. Walp)”
Claim · model-written summary
Harvest index varied among genotypes according to water regime.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- water regimee0
- Outcome
- harvest indexe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The harvest index showed a genotypic variation according to the water regime.”
t0“cowpea (Vigna unguiculata L. Walp)”
Claim · model-written summary
Suvita2 and ISV128 had the best harvest index in every water regime.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- Suvita2 and ISV128e0
- Outcome
- harvest indexe0
- Direction
- beste0
- Qualifier
- all water regimese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Suvita2 and ISV128 gave the best harvest index in all water regimes.”
t0“cowpea (Vigna unguiculata L. Walp)”
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