Cowpea Cultivars Produced With Different Phosphorus Levels / Desempenho De Cultivares De Feijão-Caupi Em Função De Doses De Fósforo

Abstract

In order to evaluate the performance of cowpea subjected to doses of phosphorus (P), a study was conducted in the experimental field of the State University of Southwest Bahia, on a Typical Yellow Dystrophic Latosol, using the BRS Guariba and BRS Xiquexique cultivars. The treatments consisted of four doses of P: 0, 60, 120 and 180 kg ha -1 of P2O5. The experimental units were composed of five sowing lines spaced from 0.5 and 0.6 m, with spacing between plants of 0.1 and 0.125 m, respectively, according to the worked cultivar. The experiment was conducted in a randomized block design with three replications. The plants were grown in rain-fed conditions, until they reached the point of harvest. As Flowering was starting, samples were withdrawals to evaluate the dry mass and leaf area yield. At the end of the cycle, the production components of the culture were quantified. The data were subjected to analysis of variance and subsequently, the Polynomial Regression analysis was performed using the Sisvar statistical program at the level of 5% probability. Phosphate fertilization increased the dry matter mass production, the number of pods per plant and grain per pod, as well as increased productivity.