Sorghum Biomass Production for Energy Purpose Using Treated Urban Wastewater and Different Fertilization in a Mediterranean Environment

摘要: With the aim at enhancing sustainability of biomass production in Mediterranean area, this paper analyzes, for first time, sorghum (Sorghum bicolor (L.) Moench) bioenergy using urban treated wastewaters and bio-fertilization. For purpose, effects on three different fertilizations (no-nitrogen control, biofertilizer, mineral ammonium nitrate), four levels constructed wetland (CW) wastewater restitutions (0%, 33%, 66% 100%) crop evapotranspiration (ETc) harvesting dates (at full plant maturity, initial senescence stage, post-senescence stage) were evaluated a two year trial. bio-fertilization, commercial product based arbuscular mycorrhizal fungi was used. Mineral nitrogen (N) fertilization significantly increased dry (+22.8% +16.8% second year) compared to control (95.9 188.2 g·plant−1, respectively). The lowest highest production, 2008 2009, found 0% (67.1 118.2 g·plant−1) 100% (139.2 297.4 ETc restitutions. In both years, harvest gave yield (124.3 g·plant−1 321.3 second), followed by third one. results showed that areas, wetlands wastewaters, when complying with European restrictions their use agriculture, may represent an important tool enhance stabilize energy crops recycling scarce quality water nutrients otherwise lost environment.