Management of Residues from Fruit Tree Pruning: A Trade-Off between Soil Quality and Energy Use
2021
Angela Libutti | Anna Rita Bernadette Cammerino | Massimo Monteleone
In the EU, bioenergy is by far the most significant renewable energy source and more than two thirds of biomass utilized for energy conversion consists of forestry and agricultural residues, such as fruit tree pruning. Although still underutilized, biomass from pruning is a relevant energy feedstock that does not generate additional demand for land, nor negative impact on the environment and biodiversity. On the other hand, previously shredded pruning left in the field may sustain agricultural processes and help provide beneficial ecological services. In the latter case, the most relevant result is the increase in soil organic carbon, an essential factor for improving soil quality and promoting climate regulation. As a result, a “dilemma” arises for farmers over two conflicting pruning management options: “pruning to energy” vs. “pruning to soil”, respectively. The present study, performed in the frame of the Horizon 2020 project “uP_running”, is offering a straightforward evaluation tool to assess weather biomass resulting from fruit tree pruning could be removed from the field and used as energy feedstock without compromising both soil quality and the provision of important ecosystem services.
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