Improving soil fertility with Students from the Félix Muriel Secondary School in Rianxo

On February 13th, Rianxo hosted a day dedicated to improving soil fertility, with the participation of students from the Félix Muriel Secondary School. This initiative was coordinated by the USC (through the UXAFORES research group) and included the collaboration of the Plataforma pola Defensa do Monte.

February 17, 2025 – On February 13th, the Barbanza Ecosocial Laboratory organized a day dedicated to improving soil fertility in Rianxo, in collaboration with the University of Santiago de Compostela through the UXAFORES research group of Campus Terra, the entity responsible for soil improvement and restoration activities within the project. The initiative also had the support of the Plataforma pola Defensa do Monte (PDM), the Monte Vivo project of the Rianxo Secondary School, and the Rianxo City Council, which covered student travel expenses. The UXAFORES group is developing interventions within the Laboratory aimed at improving soil fertility through residue and byproduct-based fertilizers, as well as analyzing the potential for commercializing carbon credits through improved forest management.

The event was attended by 15 students from the Félix Muriel Secondary School in Rianxo, from their fourth year of secondary school and from their first year of the intermediate cycle of Care for People in Situations of Dependency. They were accompanied by Yolanda Paz Pereira, a Community Services teacher in the intermediate cycle of Care for People in Situations of Dependency and coordinator of the Monte Vivo project, and Jesús Luís Díaz Cadaveira, an economics teacher and member of the Bioculture and Bioeconomy working group of the Monte Vivo project.

The activity began at the Vicente Vidal Cultural Center in Rianxo with a presentation given by Esperanza Álvarez, professor in the Department of Soil Science and Agricultural Chemistry at the Lugo Campus and coordinator of the UXAFORES group. During this session, students learned in depth about the experimental plots project, reflecting on the importance of soil as a non-renewable resource, essential for environmental balance, food and fiber production, pollutant retention, and the fight against climate change, among many other ecosystem services.

Participants had the opportunity to understand the importance of soil conservation and sustainable management, rooted in the role that ‘montes’ play when providing goods and services. As Esperanza Álvarez emphasized, “the rehabilitation of degraded soils is key to the recovery of forest ecosystems, so these types of projects allow us to move toward favorable resource management based on scientific knowledge.”

After the theoretical session, the day continued with a chestnut tree plantation on ‘Monte Pena’, in the parish of Leiro, in an area located on the slope that descends toward the areas of Meiquiz and Or, where the PDM has planted 3,000 chestnut trees in recent months, an essential step toward forest rehabilitation and the consolidation of a more sustainable and resilient model. In the chestnut tree plantation carried out by the students of Félix Muriel, various fertilizer mixtures formulated by the UXAFORES scientific team were applied to evaluate their impact on soil properties and biodiversity. “Our goal is for these types of actions to serve as an example that other ‘monte’ management methods are possible, involving the local community and based on ecological criteria”, said Rafael Saco, president of the PDM.

The experiment was structured in a total of 64 experimental plots, where eight types of fertilizer treatments were applied based on different combinations of organic residues abundant in the area, one of which was a control without any addition. The mixtures were defined after a prior soil analysis and were applied with four iterations and two doses per treatment. Two chestnut trees were planted in each plot. In the plots with the lowest dose (12 tons per hectare), each chestnut tree received 2 kg of the mixture and 70 g of inorganic fertilizer (9-20-8 NPK + 3 MgO + 17 SO3 + B), while in the plots with the highest doses (24 tons per hectare), each tree received only 4 kg of mixture without mineral fertilizer.

The addition of inorganic fertilizer is the standard practice in the area for this type of plantation, and the objective is to replace it with organic dressings based on residues/byproducts, which are very abundant in the region. This would contribute to more sustainable production, recycling and waste recovery within a circular economy, and the fight against climate change. The composition of each treatment was:

  1. Mix 1: 33% goat manure + 33% mussel shell + 34% seaweed
  2. Mix 2: 50% goat manure + 25% mussel shell + 25% seaweed
  3. Mix 3: 25% goat manure + 25% mussel shell + 50% seaweed
  4. 100% Goat manure
  5. 100% Mussel shell
  6. 100% Seaweed
  7. 100% Compost made from various waste/byproducts
  8. Control with 0% input (no fertilizer or dressings)

Over the next 6 to 12 months, a new sample collection and vegetation inventory will be developed, measuring the evolution of soil fertility and biodiversity. This initiative represents a step forward in sustainable forest management, involving the educational community in the rehabilitation and conservation of the natural environment. “Involving students in real-life environmental rehabilitation projects helps them understand the importance of biodiversity and the sustainable management of natural resources,” explained Yolanda Paz Pereira, a teacher at IES Félix Muriel.

 

Barbanza Ecosocial Lab has the support of the Biodiversity Foundation of the Ministry for the Ecological Transition and the Demographic Challenge (MITECO) of the Government of Spain, within the framework of the Recovery, Transformation and Resilience Plan (PRTR), funded by the European Union – NextGenerationEU.

Coordinated by Fundación RIA, the Barbanza Ecosocial Lab is a project dedicated to promoting the transition towards environmental sustainability and strengthening resilience in the territorial management of the Barbanza common land.

Related news