Soil degradation and biodiversity loss are interconnected environmental crises demanding innovative and sustainable solutions. This research investigates the potential of lavender (Lavandula spp.) cultivation as a multifunctional tool for phytoremediation and biodiversity enhancement in degraded agricultural landscapes. Lavender, a perennial, drought-resistant aromatic plant, is known for its hardiness and low-input requirements. We hypothesized that its deep root system, specific biochemical exudates, and floral characteristics could concurrently improve soil health and support diverse pollinator populations. A two-year field experiment was conducted on a marginally productive, slightly contaminated site, comparing lavender plots with control plots of spontaneous vegetation. Soil samples were analysed pre- and post-cultivation for key parameters, including heavy metal content (Pb, Zn), polycyclic aromatic hydrocarbons (PAHs), soil organic carbon (SOC), aggregate stability, and microbial biomass. Above-ground invertebrate biodiversity was assessed using pitfall traps and pan traps to monitor pollinator and beneficial insect activity. Results demonstrated that lavender cultivation significantly increased SOC by 18% and improved water-stable aggregates by 25% compared to controls. Notably, the lavender plots showed a 30% reduction in bioavailable fractions of lead and a 15% reduction in certain light PAHs, indicating a phyto-stabilization and microbial degradation enhancement capacity. Furthermore, the lavender fields supported a 50% greater abundance and a 40% higher species richness of pollinators, including bees, butterflies, and hoverflies, compared to control areas. The study concludes that lavender cultivation presents a viable, economically attractive strategy for the ecological restoration of marginal lands. It offers a simultaneous win-win outcome: remediating soil contaminants through phyto management while creating high-value agricultural products and critical habitats for biodiversity, thereby contributing to both ecological and economic resilience.

lavender, biodiversity, soil, standards, pollinator

agronomy

Presentation: poster