Descripció del contingut i pla d'activitats:
En trabajo consiste en evaluar los efectos del aporte de biomasa
de microalgas procedentes del tratamiento de aguas residuales en
el crecimiento de plantas de albahaca cultivadas en contenedor.
Para ello se establecerán tres tratamientos: CONTROL (adición de
solución nutritiva 100%), ALGA 1 (14 g biomasa alga + solución
nutritiva al 50%) y ALGA2 (28 g biomasa alga). Los parámetros a
estudiar son contenido de clorofila en hoja durante el cultivo y
biomasa fresca y seca, así como número de hojas, por planta al
finalizar el ensayo. Además, se determinarán los contenidos de N,
P y K en hoja al finalizar el ensayo.
El ensayo se llevará a cabo en las instalaciones de la EEABB. La
duración del trabajo experimental es de aproximadamente 3 meses.
Overview (resum en anglès):
The use of wastewater as a culture medium for algae and its subsequent use as a biofertilizer is a promising alternative to mineral fertilizers. The present study has been conducted in order to evaluate the efficiency of microalgae as fertilizer. The biofertilizer produced, composed mainly of Scenedesmus sp, has the following composition: 12% dry matter, 7.6% nitrogen, 1.6% phosphorus and 0.9% potassium. The effects of three different fertilizing treatments (100% mineral fertilization, 50% mineral fertilization + 50% biofertilizer and 100% biofertilizer) were studied in a basil crop (Ocimum basilicum L.).
Chlorophyll levels have been determined with a CCM sensor and both macro and micronutrients through foliar analysis, in addition to growth parameters such as No. of stems and leaves, both fresh and dry weight of stems and leaves and the in-leaf chlorophyll content in a basil crop.
The biofertilizer has produced significantly positive or equal effects compared to the control treatment on both the fresh and dry weights of stems and leaves. When applying the treatment that mixes both fertilizers (T-2), chlorophyll levels showed to be statistically equal to those of the mineral fertilizer. To conclude, this study suggests that the treatment that combines microalgae with inorganic fertilizer is a promising alternative for the growth of basil.