Bibliographic citations
Díaz, A., (2017). Características fisicoquímicas y microbiológicas del proceso de elaboración de biol y su efecto en germinación de semillas [Tesis, Universidad Nacional Agraria La Molina]. https://hdl.handle.net/20.500.12996/2792
Díaz, A., Características fisicoquímicas y microbiológicas del proceso de elaboración de biol y su efecto en germinación de semillas [Tesis]. : Universidad Nacional Agraria La Molina; 2017. https://hdl.handle.net/20.500.12996/2792
@mastersthesis{renati/245379,
title = "Características fisicoquímicas y microbiológicas del proceso de elaboración de biol y su efecto en germinación de semillas",
author = "Díaz Montoya, Angela Judith",
publisher = "Universidad Nacional Agraria La Molina",
year = "2017"
}
Currently, there are no defined parameters for the elaboration of biols in Peru. As a consequence the final quality of the artisan biols vary significantly. The main objective of this research is to characterize the elaboration process of biol and to assess the physical (temperature, color, scent) chemical (pH, EC, and macro and micro nutrients) and microbiological (bacterial, fungal and actinomicetes populations) during the anaerobic digestion process. Artisan biodigesters were built to test four different biol formulations that were prepared in 121 days. Each biol formulation (treatment) was produced using different inputs. The amount of hormonal precursors (auxin, gibberellin, and cytokinin) was determined for each treatment. The effect on germination rate of each biol formulation was tested on cotton, lettuce and alfalfa seeds. Physical parameters showed: (1) biol temperatures higher than room temperatures; (2) final biol color similar for three of the formulations (olive brown); and, (3) biol scent mostly within the normal range and pleasant. Chemical parameters showed across treatments: (1) an acidification phase at the beginning of the process moving towards neutrality; (2) gradual increment of the EC; and (3) significant variability in the content of micro and macronutrients, where nitrogen, potassium, calcium and boron reported similar variation tendency. Microbiological parameters showed a dissimilar variation in the bacterial, fungal and actinomicetes population among treatments. Bioassays allowed confirming the presence of substances of gibberellic, auxinic and cytokinin effect in the biols produced. Finally, the effect on germination rate was higher for cottons seeds soaked in a 5% biol solution and lettuce seeds soaked in a 2% solution. While a higher sprouts weight was obtained from alfalfa seeds soaked in a 2% biol solution.
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