Search results for " C pools"

Pedogenic carbonates and carbon pools in gypsiferous soils of a semiarid Mediterranean environment in south Italy

2013

Abstract Soil carbonates are key features in soils of arid and semiarid environment, playing an important role from pedogenetic, landscape history, paleoclimatic and environmental points of view. The objectives of this work were (i) to study pathways of pedogenic carbonate (PC) formation, (ii) to distinguish between lithogenic and pedogenic inorganic C by using the natural C isotope abundance, and (iii) to estimate the soil C pools in a gypsiferous semiarid Mediterranean environment (Sicily, Italy). Five soil pedons developed on calcareous and non-calcareous parent materials from Holocene (10,000 years BP) to Upper Tortonian (7.2–5.3 Ma BP) in age were surveyed. During field soil descriptio…

Dynamics of carbon pools in a soil covered with different forest tree species after controlled heating and wetting

2012

Fire-induced soil heating deeply affects soil organic C pools and their dynamics. The objective of this study was to investigate, in a soil covered with different forest tree species (Eucalyptus camaldulensis, E. occidentalis, Pinus halepensis, and Cupressus sempervirens), the effect of controlled heating on C pools and C mineralization dynamics. Soil samples were heated under controlled condition in laboratory (160 and 380°C) and then wetted with distilled or sea water to simulate the extinction of wildfires. Soil organic C pools react to heating in different way depending on forest tree species. Total organic C was almost halved following the heating of soils at 380°C. Soil covered with P…

APPLICAZIONE DI UN PROTOTIPO DI MOTOVANGATRICE PER PRESERVARE LA FERTILITÀ DEL SUOLO

Negli ambienti caratterizzati da forti pendenze o sistemati a terrazze, nell’ambito delle lavorazioni superficiali, viene impiegato diffusamente il motocoltivatore provvisto di zappatrice rotativa. Tuttavia, l’effetto dell’uso ripetuto della zappatrice per lavorazione del terreno ha una notevole influenza sulle caratteristiche del terreno, che si presenta finemente polverizzato, soffice e astrutturato. Al fine di limitare tali inconvenienti, è stata progettata dalla sezione Meccanica del Dipartimento Scienze Agrarie e Forestali dell’Università di Palermo, in collaborazione con la ditta costruttrice Agrotec di Padova, una macchina innovativa semovente provvista di organi di lavoro del tipo a…