Abstract

LARA MANTILLA, Cecilia  and  NEGRETE PENATA, Jorge Luis. Effect of bio-inoculant from microbial consortia phosphate solubilizing natives in development of pastures (Dichantium aristatum). Rev. colomb. biotecnol [online]. 2015, vol.17, n.1, pp.121-129.  Epub July 13, 2021. ISSN 0123-3475.  https://doi.org/10.15446/rev.colomb.biote.v17n1.50741.

The objective was to evaluate the ability of phosphate solubilizing consortium of native bacteria of the genus Burkhold-eria cepacia, Pseudomonas sp, Pseudomonas luteola and Pantoea sp, in order to find the most efficient. Antagonism tests were conducted between strains and consortia were formed using all possible combinations in the concentrations of 106, 107, 108 CFU / mL. Qualitative and quantitative determinations of the solubilization of phosphates were performed and considering these results, was prepared a bio-inoculant which was evaluated in plant seeds of grass angleton (Dichantium aristatum) laboratory scale, using a statistical completely randomized design (CRD) with 3 treatments and 5 repetitions: control Treatment 1 seeds; Treatment 2, seeds treated with the consortium of microorganisms selected and Treatment 3, seeds treated with commercial fertilizers DAP and Urea. The parameters, number of leaves, leaf area, plant length, root length and dry weights of all plants, were evaluated. The test results indicated that there is no antagonism inhibition in the growth of the strains tested thus formed consortia which showed greater efficiency phosphorus solubilization, highlighting the consortium of Pantoea sp + Pseudomonas sp at a concentration 108 CFU / mL and 5.3 solubilization rates and 842 ppm. In plants showed a significant increase in dry weight and leaf area parameters, indicating greater benefit with respect to the control treatment.

Keywords : Burkholderia cepacia; Pseudomonas sp; Pseudomonas luteola; Pantoea sp; bio-inoculant.

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