Abstract
Water availability is a major limiting factor for cowpea bean crops, especially in semiarid regions, where it is necessary to adopt more productive and tolerant genotypes and efficient strategies for water use. Thus, an experiment was carried under field conditions in the semiarid region of Pombal city, PB, Brazil. Using a completely randomised blocks design experiment and four replications, in a factorial scheme. The first factor was formed by four cowpea beans genotypes (Costela de Vaca, Pingo-de-Ouro, Paulistinha and BRS Marataoã), and the second factor consisted of five different irrigation strategies (40, 60, 80, 100 and 120% of actual evapotranspiration (ETr)). Gas exchange was evaluated at the V4 stage, dry biomatter formation at the R2 stage and crop yield until 90 days after sowing. The gas exchange from cowpea genotypes was reduced by lower irrigation amounts. For dry biomass formation, greater values in the Pingo-de-Ouro genotype were observed when irrigated with 120% of ETr. Thus, the treatment of 120% ETr improved the growth in dry matter independently of the genotype. The Costela de Vaca genotype had better CO2 assimilation rates. Paulistinha had the highest productivity among genotypes, and Costela de Vaca had the greatest water use efficiency. Key words: Assimilation rate, Vigna unguiculata, water productivity.
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Claims 6
Claim · model-written summary
Lower irrigation amounts reduced gas exchange in cowpea genotypes.
- Taxon
- cowpea
Vigna unguiculatae0 - Treatment
- lower irrigation amountse0
- Outcome
- gas exchangee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The gas exchange from cowpea genotypes was reduced by lower irrigation amounts”
Claim · model-written summary
Pingo-de-Ouro had greater dry biomass formation when irrigated at 120% ETr.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- Pingo-de-Ouroe0
- Treatment
- 120% of ETre0
- Outcome
- dry biomass formatione0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For dry biomass formation, greater values in the Pingo-de-Ouro genotype were observed when irrigated with 120% of ETr”
t0“cowpea”
Claim · model-written summary
Irrigation at 120% ETr improved cowpea dry matter growth regardless of genotype.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- 120% ETre0
- Outcome
- growth in dry mattere0
- Direction
- improvede0
- Qualifier
- independently of the genotypee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the treatment of 120% ETr improved the growth in dry matter independently of the genotype”
t0“cowpea”
Claim · model-written summary
Costela de Vaca had better CO2 assimilation rates among cowpea genotypes.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- Costela de Vacae0
- Outcome
- CO2 assimilation ratese0
- Direction
- bettere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Costela de Vaca genotype had better CO2 assimilation rates”
t0“cowpea”
Claim · model-written summary
Paulistinha had the highest productivity among cowpea genotypes.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- Paulistinhae0
- Outcome
- productivitye0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Paulistinha had the highest productivity among genotypes”
t0“cowpea”
Claim · model-written summary
Costela de Vaca had the greatest water use efficiency among cowpea genotypes.
- Taxon
- cowpeaVigna unguiculatat0
- Material
- Costela de Vacae0
- Outcome
- water use efficiencye0
- Direction
- greateste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Costela de Vaca had the greatest water use efficiency”
t0“cowpea”
The same questions in other papers
irrigation · physiology: gas exchange · Vigna unguiculata (cowpea)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- positive
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