FRADE, L. J. G.; http://lattes.cnpq.br/8732669371738493; FRADE, Luciano Jonatas Gomes.
Résumé:
The cowpea has economic importance, social and to feed. However, the Brazilian
semiarid region presents water limitations for cultivation. Thus, it is important to
identify genotypes and efficient irrigation leveis. The objective was to study the
components of production of cowpea genotypes under irrigation leveis, checking the
tolerance to water stress and efficiency in water use. The experiment was carried out
in the field, in the municipality of Pombal, PB, under semi-arid climate conditions. The
experimental design was a randomized blocks, in a factorial 4 x 5, for four cowpea
genotypes (Costela de Vaca, Pingo de Ouro, Paulistinha and BRS Marataoã) and
ave irrigation leveis with (40, 60, 80, 100 and 120% of evapotranspiration real- ETr)
in four replications. Data were evaluated by analysis of variance. We evaluated the
characteristics length, mass and number of pod beans, number of pods per plant,
production and efficiency in water use. There was a significant interaction between all
factors, except for mass with grains per pod and number of pods per plant. The
Costela de Vaca and Pingo de Ouro are not suitable for mechanical harvestingl The
BRS Marataoã did not change the physical characteristics of the pods in function of
irrigation, with acceptable performance in blade 230,69mml The Costela de Vaca
genotype cow and Paulistinha were more productive, with satisfactory yield with
application 162,84mml The genotype Pingo de Ouro is lesa productive under water
restrictionl The Paulistinha was tolerant the most water scarcity , increasing
efficiency in water use in decreasing the applied blade.
