Germinação e desenvolvimento inicial de Vigna unguiculata (L.) Walp. inoculada com bactérias diazotróficas

Abstract

The objective of the work was evaluated as initial germination and growth of cowpea inoculated with diazotrophic bacteria. Two experiments were carried out under greenhouse conditions at the Federal University of the Recôncavo da Bahia - UFRB, at the Center of Agrarian, Environmental and Biological Sciences - CCAAB, in Cruz das Almas - BA. In the first experiment of the soil collected at the experimental campus of UFRB in the 0 - 20 cm layer, it was autoclaved, there was no experiment or collected alone in Maragogipe was used without sterilization. The experimental design was completely randomized with treatments and seven replicates. The treatments consisted of four test stirrups (UFRB FA51B1, UFRB FA34C2-2, UFRB BA72C2-1 and UFLA 3-164) two strains authorized by the Ministry of Agriculture, Livestock and Food Supply (INPA 3-11B and UFLA 3- 84) and two controls, one with mineral nitrogen and the other without inoculant and without mineral nitrogen. Germination and emergency speed index, emergency speed coefficient, first germination count, mean germination time, chlorophyll indices, seedling height, number of germination and germination were determined. Leaves, dry shoot mass, efficiency and efficiency. In the autoclaved soil, a strain in the test phase, UFRB BA72C2-1, provided the highest averages of emergence velocity and germination, whereas a UFRB FA51B1 strain, also in the test phase, presented better results for shoot dry mass, Relative And efficacy, having as control the mineral nitrogen. In the natural soil the strain in the selection phase UFRB FA34C2-2 proved to be efficient in the emergence, shoot dry matter, efficiency and efficiency variables. Germination and initial development of cowpea were stimulated by the inoculation of diazotrophic bacteria at sowing.