Bioestimulation of guajiro bean and its symbiosis with Rhizobium by humic acids and Bacillus mycoides
Biostimulation is a suitable technology in support of organic farming intensification, mainly in soils located in marginal areas where environmental tensors driving permanent stress conditions to plant growth and development, causing downturn in productivity. 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. Additionally, the chemical identity of the HA was determined, related to their bioactivity. 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.
| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad del Cauca -Facultad de ciencias Agrarias
2021
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| Online Access: | https://revistas.unicauca.edu.co/index.php/biotecnologia/article/view/1608 |
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