Resumen

VALERO-VALERO,, NELSON-OSVALDO; VERGEL-CASTRO,, CLAUDIA-MARCELA; USTATE,, YEISON  y  GOMEZ-GOMEZ,, LILIANA-CECILIA,. Bioestimulation of guajiro bean and its symbiosis with Rhizobium by humic acids and Bacillus mycoides. Rev.Bio.Agro [online]. 2021, vol.19, n.2, pp.119-134.  Epub 30-Jun-2021. ISSN 1692-3561.  https://doi.org/10.18684/bsaa.v19.n2.2021.1608.

Biostimulants promote physiological and morphological changes in the plant, leading to better adaptation in adverse conditions and increases in growth and productivity. In this work, we evaluated the biostimulatory effect of Bacillus mycoides BSC25 and humic acids derived from goat manure vermicompost (HA-V) and a lignite low rank coal (HA-C), on guajiro beans (Vigna unguiculata L. Walp). The work included: 1) checking in the soil the presence of rhizobia capable of forming nodules on V. unguiculata, and molecular typing of an Rhizobium isolated strain, 2) experiments under controlled conditions in a plant growth chamber to check the promotion of bean seedlings early growth treated separately with HA-V, HA-C or B. mycoides and joint application trials HA-B. mycoides, 3) development under a field conditions bioestimulation trial with HA-V,HA-C and B. mycoides in a semi-arid soil of the mean Guajira.. It was found that a population of Rhizobium sp. strain persistent in the soil was able to nodulate guajiro bean; in addition, treatment with both biostimulants, HA or B. mycoides, promote bean growth and increases nodulation degree of the rhizobia native population, these findings suggests the convenience of promote this technology to improve the production of guajiro bean crop.

Palabras clave : Vigna unguiculata L.; Rhizobium sp.; Guajira; Phytostimulants; Vermicompost; Lignite; Semi-arid soil; Nodulation; Goat; Low Rank Coal.

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