Growth-promoting microorganisms in the development of orchid seedlings of Phalaenopsis, Cymbidium, and Dendrobium genera

The demand for sustainable agricultural production systems is increasing, and using growth-promoting microorganisms in plants has stood out because it decreases or even replaces chemical fertilizer use, reducing costs. This study aimed to evaluate the response of some applied seedlings primary orchids cultivated Brazil (Phalaenopsis sp. 'Taisuco Swan', Cymbidium atropurpureum, Dendrobium secundum). experimental design was completely randomized. There were seven treatments (absence – control, Trichoderma sodium alginate, clay, alginate a liquid medium, Azospirillum brasilense + Bacillus subtilis pumilus medium), four replications, three per plot. grown greenhouse evaluated 190 days after microorganism inoculation. evaluation morpho-physiological characteristics differed according particularities each genus. rhizobacteria medium Phalaenopsis Swan' fungus atropurpureum increased seedling growth development. secundum orchid promoted more root biomass. Using beneficial cultivation promising, development depend on their inoculation plant.