The Andalusian countryside is preparing for a scientific breakthrough that could change how we understand the fertilization of our most emblematic trees. Recently, the University of Jaén (UJA) and the company Genia Bioenergy They have sealed a technical collaboration agreement to test something that promises to be a breath of fresh air for the sector: the use of the solid fraction of biogas digestate as organic fertilizer in olive groves.
This research, which will last for a year and a half, is not born out of love for the art, but to provide an answer to one of the major headaches of olive groves in the Mediterranean, which is none other than the scarce presence of organic matter These lands are left over after decades of exploitation and sometimes misguided management. The aim is to determine if this material, a byproduct of clean energy production, can restore the soil's vitality and carbon reserves.
Circular economy: from waste to energy and agricultural resource
The idea that the experts are working with is sound from a sustainability point of view, since it aims to convert a agro-industrial waste in a resource of high value. Instead of the organic waste being lost or managed inefficiently, it goes through a biogas plant where energy is extracted, and what remains is returned to the fields. According to those in charge of the project, they are not reinventing the wheel, but rather improving an existing cycle, making it much more economically and environmentally beneficial.
The truth is that this resulting material, the digested matter, reaches the olive tree after a natural decomposition process. The researchers insist that It doesn't smell bad, it smells like compost. from forest, since it is an organic matter that has already been stabilized. This is key for farmers to overcome their fear of these products, which sometimes carry unnecessary stigmas when in reality they are very powerful tools for improving farm structure and preventing signs of depletion.
Scientific rigor on experimental farms
To ensure that no one has any doubts about the safety of what is being put into the field, the study will be carried out under the watchful eye of Royal Decree 1051/2022 on sustainable nutritionBefore the digestate touches the soil, it will be thoroughly analyzed to ensure it meets all quality standards. The trials will begin in September on farms already participating in the European Soil O-live project, where the University of Jaén (UJA) has extensive experience and a thorough understanding of the history of each plot.
During the months that the experiment lasts, very technical but fundamental parameters will be measured, such as the soil respiration and carbon fluxesto see how the soil reacts to the new ingredient. It will be tested in both traditional and more intensive olive groves, so that the results are representative of what any farmer encounters on a daily basis. Ultimately, the goal is to demonstrate with concrete data that it is a safe, non-polluting material that contributes to a more robust harvest.
A multidisciplinary team for a strategic sector
Behind all this scientific machinery is a team led by Professor of Ecology Antonio Manzaneda, along with soil specialists such as Julio Calero and staff from University Institute for Research in Olive Groves and Olive Oils (INUO). On the business side, coordination is handled by experts from Genia Bioenergy, ensuring that the academic and operational aspects of the biogas plants go hand in hand at all times.
This collaboration is vital for a sector considered strategic not only in Jaén, but throughout Spain. By improving soil quality, the problem is tackled at its root, preventing land degradation from ultimately impacting olive oil production. The message is clear. peace and confidence to societydemonstrating that green innovation is perfectly compatible with the profitability of the countryside and respect for the natural environment.
Ultimately, this path undertaken by academia and private enterprise seeks not only to revitalize our lands, but also to offer farmers a reliable and tested alternative that has already passed through the renewable energy filter before returning to its origin, ensuring that the olive grove continues to be the driving force of our land with soils that are much more vibrant, fertile and prepared for the climate challenges ahead.