Abstract

LARA MANTILLA, Cecilia; GARCIA TAMARA, Liliana Pahola  and  OVIEDO ZUMAQUE, Luis E. Biofertilizer effect of the prepared from vegetales wastes -diazotroph native bacterium on biometrics variables of Rhapanus sativus seedlings. Rev. colomb. biotecnol [online]. 2011, vol.13, n.1, pp.156-162. ISSN 0123-3475.

The use of bioinoculantes from microorganisms with biofertilizer potential, represents an economically viable alternative and of clean production for the agricultural sector. The aim of this study was to evaluate the effect of biofertilizer preparation obtained from vegetable solid waste (RSV) of the market and the native bacteria Azotobacter A15M2G diazotroph. Biological cultures were prepared using different inoculum concentrations, 106, 107 y 108 UFC in a culture medium obtained from 25% w / v of each of the following substrates: Brassica oleracea (cabbage), Lactuca sativa (lettuce) and Allium fistulosum (chives). The microbial inoculants were evaluated in radish plants (Rhapanus sativus) in greenhouse using a completely randomized design of 5 treatments with 3 replicates: T1, pre-germinated seeds without any treatment; T2, pre-germinated seeds treated with the dye waste vegetables 25% w / v; T3, pre-germinated seeds treated with bacterial concentration bioinoculants to 106 UFC; T4, pre-germinated seeds treated with bacterial concentration bioinoculants to 107 UFC, and T5, pre-germinated seeds treated with bacterial concentration bioinoculants to 108 UFC. Assessed variables were: number of leaves, leaf area, plant length, root length and dry weight of the entire plant (all assays in triplicate). The results showed a highly significant increase in dry weight, for T5 (0.88 g) and T4(1.10 g); and significant differences in leaf area for the same treatments, with a value greater than 2000 cm2, compared to others. The biopreparado from native bacteria and RSV improved the growth and development of the radish plants, being able to give a added value to these residues and to obtain a potentially usable biofertilizer in other cultures.

Keywords : Azotobacter A15M2G; Brassica oleracea; Lactuca sativa; Allium fistulosum; bioinoculants.