Adubação fosfatada e uso de microrganismos solubilizadores na cultura do feijão-caupi

Abstract

The use of phosphate solubilizing microorganisms can assist in better utilization of soil phosphorus, especially in relation to alternative sources of phosphate. Thus, the objective of this study was to evaluate the development of cowpea using different sources of phosphate fertilizers and inoculation with phosphate solubilizing microorganisms under greenhouse conditions. The experiment was conducted in pots with soil collected from the superficial layer with entirely randomized experimental design (DIC) with seven treatments and five repetitions: T1- no P and no phosphate solubilized microorganism (MSP) inoculation; T2- no P and with MSP inoculation; T3-simple superphosphate (SS) with MSP inoculation; T4- natural phosphate (FN) with MSP inoculation; T5- SS and FN with MSP inoculation; T6- rock phosphate (FR) with MSP inoculation and T7- SS, FR with MSP inoculation. Chlorophyll at flowering stage and yield components and yield at the end of the cocoa bean crop cycle were evaluated. The use of simple superphosphate fertilizer combined with natural phosphate and with the inoculation of phosphate solubilizing microorganisms (Bacillus sp bacteria) promoted greater gain in mass of hundred grains and greater insertion of the first pod, but without effects on the productivity of the cowpea bean.