Effect of injection depth of digestate liquid fraction on soil carbon dioxide emission and maize biomass production

The aim of this study was to evaluate, in open field conditions, the effect of injection depth of digestate liquid fraction (10 cm, 25 cm and 35 cm) in clay loam soil, on CO2 emission. An un-amended soil was considered as control. The study was performed in 2014 on a farm located in Terrasa Padovana, Veneto region (Italy) distributing digestate before maize sowing. Digestate injection determined a high soil CO2 emission in the first hour after application, followed by a progressive reduction in as early as 24 h, reaching significantly lower values, similar to those measured in the un-amended control, after 48 h. Gas emissions measured 1 h after digestate application decreased as injection depth increased with significantly higher emission values in the 10 cm treatment (median value 23.7 g CO2 m\u20132 h\u20131) than in the 35 cm one (median value 2.5 g CO2 m\u20132 h\u20131). In the 3 days between digestate distribution and maize sowing, soil CO2 emission was significantly higher in the amended treatments than un-amended one, with median values of 1.53 g CO2 m\u20132 h\u20131 and 0.46 g CO2 m\u20132 h\u20131 respectively. During maize growing season, no significant soil CO2 emission difference was monitored among treatments, with a median value of 0.33 g CO2 m\u20132 h\u20131. Digestate application significantly improved maize aboveground dry biomass with an average yield of 22.0 Mg ha\u20131 and 16.2 Mg ha\u20131 in amended and un-amended plots, respectively, due to the different amount of nutrients supplied

Role of C3 plant species on carbon dioxide and methane emissions in Mediterranean constructed wetland

C3 plant species are widely used to vegetate constructed wetlands (CW), but so far no information is available on their effect on CW CO 2(eq) balance in the Mediterranean climate. The aim of this research was to study carbon dioxide (CO 2 ) and methane (CH 4 ) emissions and CO 2(eq) budgets of CW horizontal sub-surface flow pilot-plant beds vegetated with Arundo donax L. and Phragmites australis (Cav.) Trin. ex Steud. compared with an unvegetated bed in Sicily. The highest total plant biomass production was measured in the bed vegetated with A. donax (17.0 kg m –2 ), whereas P. australis produced 7.6 kg m –2 . CO 2 and CH 4 emissions and showed significant correlation with average air temperature and solar radiation for each bed. The CO 2 emission values ranged from 0.8±0.1 g m –2 d –1 , for the unvegetated bed in April, to 24.9±0.6 g m –2 d –1 for the bed with P. australis in August. The average CO 2 emissions of the whole monitored period were 15.5±7.2, 15.1±7.1 and 3.6±2.4 g m –2 d –1 for A. donax , P. australis and unvegetated beds respectively. The CH 4 fluxes differed significantly over the monitored seasons, with the highest median value being measured during spring (0.963 g m –2 d –1 ). No statistical differences were found for CH 4 flux among the studied beds. Cumulative estimated CH 4 emissions during the study period (from April to December) were 159.5, 134.1 and 114.7 g m –2 for A. donax , P. australis and unvegetated beds respectively. CO 2(eq) balance showed that the two vegetated beds act as CO 2(eq) sinks, while the unvegetated bed, as expected, acts as a CO 2(eq) source. Considering only the above-ground plant biomass in the CO 2(eq) budgets, P. australis and A. donax determined uptakes of 1.30 and 8.35 kg CO 2(eq) m –2 respectively

The Sicilian Grid Infrastructure for High Performance Computing

The conjugation of High Performance Computing (HPC) and Grid paradigm with applications based on commercial software is one among the major challenges of today e-Infrastructures. Several research communities from either industry or academia need to run high parallel applications based on licensed software over hundreds of CPU cores; a satisfactory fulfillment of such requests is one of the keys for the penetration of this computing paradigm into the industry world and sustainability of Grid infrastructures. This problem has been tackled in the context of the PI2S2 project that created a regional e-Infrastructure in Sicily, the first in Italy over a regional area. Present article will describe the features added in order to integrate an HPC facility into the PI2S2 Grid infrastructure, the adoption of the InifiniBand low-latency net connection, the gLite middleware extended to support MPI/MPI2 jobs, the newly developed license server and the specific scheduling policy adopted. Moreover, it will show the results of some relevant use cases belonging to Computer Fluid-Dynamics (Fluent, OpenFOAM), Chemistry (GAMESS), Astro-Physics (Flash) and Bio-Informatics (ClustalW))

The Sicilian Grid Infrastructure for High Performance Computing

The conjugation of High Performance Computing (HPC) and Grid paradigm with applications based on commercial software is one among the major challenges of today e-Infrastructures. Several research communities from either industry or academia need to run high parallel applications based on licensed software over hundreds of CPU cores; a satisfactory fulfillment of such requests is one of the keys for the penetration of this computing paradigm into the industry world and sustainability of Grid infrastructures. This problem has been tackled in the context of the PI2S2 project that created a regional e-Infrastructure in Sicily, the first in Italy over a regional area. Present paper will describe the features added in order to integrate an HPC facility into the PI2S2 Grid infrastructure, the adoption of the InifiniBand low-latency net connection, the gLite middleware extended to support MPI/MPI2 jobs, the newly developed license server and the specific scheduling policy adopted. Moreover, it will show the results of some relevant use cases belonging to Computer Fluid-Dynamics (Fluent, OpenFOAM), Chemistry (GAMESS), Astro-Physics (Flash) and Bio-Informatics (ClustalW))

Jean-Baptiste Molin et Protais Mutembe. — Le rituel du mariage en France, du XIIe au XVIe siècle, 1974 (" Théologie historique ", 26)

Labande-Mailfert Yvonne, Barbera Carmelo. Jean-Baptiste Molin et Protais Mutembe. — Le rituel du mariage en France, du XIIe au XVIe siècle, 1974 (" Théologie historique ", 26). In: Cahiers de civilisation médiévale, 21e année (n°84), Octobre-décembre 1978. pp. 411-415

Alain de Lille, Anticlaudianus, trad. en anglais et commenté par James J. Sheridan, 1973

Labande-Mailfert Yvonne, Barbera Carmelo. Alain de Lille, Anticlaudianus, trad. en anglais et commenté par James J. Sheridan, 1973. In: Cahiers de civilisation médiévale, 19e année (n°76), Octobre-décembre 1976. pp. 420-421

Alain de Lille, Anticlaudianus, trad. en anglais et commenté par James J. Sheridan, 1973

Labande-Mailfert Yvonne, Barbera Carmelo. Alain de Lille, Anticlaudianus, trad. en anglais et commenté par James J. Sheridan, 1973. In: Cahiers de civilisation médiévale, 19e année (n°76), Octobre-décembre 1976. pp. 420-421

Lolium multiflorum Lam. cvs germination under simulated olive mill wastewater salinity and pH stress

The agronomic use of olive mill wastewaters (OMWs) is limited by some constraints, such as high salinity, acidity, and phenolic compounds that exert phytotoxic and antimicrobial effects. Many researches have been focused on OMW polyphenol effects on germination, but only few on the combined effects of salinity and acidity. In this paper, on Lolium multiflorum Lam., the effects on germination of pH and osmotic potentials similar or higher to those found in OMWs have been investigated. The studied salinity and pH levels did not affect final germination of L. multiflorum, but in some cultivars they significantly enhanced T50 and consequently reduced initial root growth. Thus, in this species moderately tolerant to salinity, the reduction of germination determined by OMWs cannot be attributed to the osmotic stress and/or to the low pH, but mainly to polyphenols. This research emphasizes the possibility of obtaining good crop establishments after spreading OMWs on soil, choosing herbaceous species tolerant to salinity once polyphenols have been inactivated