Studio del turnover della sostanza organica e del carbonio radicale in una successione secondaria attraverso isotopi stabili di C

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Abstract

[automatically translated] The study analyzed the effects of changing land use on organic carbon reserves and the distribution in a secondary succession. E 'was selected in the territory of Montevago, in the province of Agrigento, a secondary succession consists of Mediterranean, plant prickly pear and olive grove. The change of use of land from natural vegetation to the prickly pear plant resulted after 28 years a reduction of 65% organic C, followed by a further reduction of 14% after 7 years of implantation of the olive grove. Taking advantage of the differences in 13C between plants in the photosynthetic cycle C3 and C4 was estimated turnover of organic matter derived from the biomass of Mediterranean scrub and prickly pear. The average time of turnover for the Mediterranean is 143 years old, while prickly pear is 10 years. The analysis of the content of total carbon and δ13 C, both along the soil profile (0-75cm) and in alleyways, allowed to represent and describe the distribution of the carbon derived from the new and the old vegetation and to study the development radical apparatus of the two cultivated species. Foreground, accompanied by direct measurements of the weight of the root biomass of prickly pear, have been used to formulate a method to estimate the turnover of root biomass. This data is useful for evaluating the carbon input and consequently the efficiency of organic carbon sequestration in various land uses. It allowed to represent and describe the distribution of carbon derived from the new and the old vegetation and to study root development of the two cultivated species. Foreground, accompanied by direct measurements of the weight of the root biomass of prickly pear, have been used to formulate a method to estimate the turnover of root biomass. This data is useful for evaluating the carbon input and consequently the efficiency of organic carbon sequestration in various land uses. It allowed to represent and describe the distribution of carbon derived from the new and the old vegetation and to study root development of the two cultivated species. Foreground, accompanied by direct measurements of the weight of the root biomass of prickly pear, have been used to formulate a method to estimate the turnover of root biomass. This data is useful for evaluating the carbon input and consequently the efficiency of organic carbon sequestration in various land uses. They have been used to formulate a method to estimate the turnover of root biomass. This data is useful for evaluating the carbon input and consequently the efficiency of organic carbon sequestration in various land uses. They have been used to formulate a method to estimate the turnover of root biomass. This data is useful for evaluating the carbon input and consequently the efficiency of organic carbon sequestration in various land uses.
Original languageItalian
Pages31-31
Number of pages1
Publication statusPublished - 2012

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