When water-ways and canals are dredged, enormous amounts of polluted sediments have to be stocked and then transported to the landfill with incredibly high costs of management. By the application of the Agriport methodology (developed by ISE-CNR, Italy) based on phytoremediation and land farming, the sediments of Navicelli water way (Pisa) were remediated reaching pollutant concentrations below the Italian law (D.L. 152/06). During the European Life+ project CleanSed (LIFE12 ENV/IT/00652), we tested these remediated sediments for plant nursing field-grown plantations, identifying the best concentrations mixed to alluvial agronomic soil. The experiment was set up in 2014 simulating an open field plantation with 2 mix of sediments and agronomic soil at 33% and 50% by volume, compared to control soil (100% agronomic soil, slightly silty). Three evergreen ornamental shrubs (Viburnum tinus L., Photinia x fraseri var. red robin, Eleagnus macrophylla L.) were planted and monitored in physiological parameters and finally (at the end of two growing seasons) they were assessed in biomass and root ball. The results of the experiment did not evidence significant differences between the treatments and control in growth and final biomass for P. x fraseri and E. macrophylla, while in V. tinus an enhancement in biomass was observed in the treatments. The presence of sediments enhanced also the root growth with less plants showing dead thin roots especially in the latter species (in facts, the sediments increase water infiltration and drainage whilst the alluvial soil showed water stagnation). In contrast, the sediments increased root ball deformation and breakage, especially in T50 (less compaction and resistance to penetration). These results open perspectives for the use of remediated sediments in the sector of plant nursing though addressing specific purposes and following recommendations at the application stage.
Remediated water-ways sediments tested for plant nursing field plantations (Cleansed Life+ project)
Ugolini F;Lanini GM;Martelli F;Massetti L;Raschi A;Sabatini F;Tagliaferri G;Ungaro F;Masciandaro G
2016
Abstract
When water-ways and canals are dredged, enormous amounts of polluted sediments have to be stocked and then transported to the landfill with incredibly high costs of management. By the application of the Agriport methodology (developed by ISE-CNR, Italy) based on phytoremediation and land farming, the sediments of Navicelli water way (Pisa) were remediated reaching pollutant concentrations below the Italian law (D.L. 152/06). During the European Life+ project CleanSed (LIFE12 ENV/IT/00652), we tested these remediated sediments for plant nursing field-grown plantations, identifying the best concentrations mixed to alluvial agronomic soil. The experiment was set up in 2014 simulating an open field plantation with 2 mix of sediments and agronomic soil at 33% and 50% by volume, compared to control soil (100% agronomic soil, slightly silty). Three evergreen ornamental shrubs (Viburnum tinus L., Photinia x fraseri var. red robin, Eleagnus macrophylla L.) were planted and monitored in physiological parameters and finally (at the end of two growing seasons) they were assessed in biomass and root ball. The results of the experiment did not evidence significant differences between the treatments and control in growth and final biomass for P. x fraseri and E. macrophylla, while in V. tinus an enhancement in biomass was observed in the treatments. The presence of sediments enhanced also the root growth with less plants showing dead thin roots especially in the latter species (in facts, the sediments increase water infiltration and drainage whilst the alluvial soil showed water stagnation). In contrast, the sediments increased root ball deformation and breakage, especially in T50 (less compaction and resistance to penetration). These results open perspectives for the use of remediated sediments in the sector of plant nursing though addressing specific purposes and following recommendations at the application stage.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
