TAILIEUCHUNG - Báo cáo lâm nghiệp: "Biomasse, productivité et transferts de matière organique dans une séquence altitudinale de peuplements de Castanea sativa Mill de l’Etna"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế, đề tài: "Biomasse, productivité et transferts de matière organique dans une séquence altitudinale de peuplements de Castanea sativa Mill de l’Etna. | Ann Sci For 1996 53 1031-1048 Elsevier INRA 1031 Article original Biomasse productivity et transferts de matière organique dans une sequence altitudinale de peuplements de Castanea sativa Mill de I Etna s Leonard 1 2 M Rapp3 M Failla1 D Guarnaccia1 1 Facolta di Scienze Matematiche Fisiche e Natural Università di Catania 19 Via A Longo 95125 Catania 2 Corso di Laurea in Scienze Forestall ed Ambientali Università di Palermo 23 Via Poma 92010 Bivona Italie 3 CNRS-CEFE BP 5051 34033 Montpellier cedex France Reẹu le 3 octobre 1994 accepté le 19 septembre 1995 Summary - Biomass productivity and organic manor fluxes in Castanea sativa Mill stands of various elevation in the Etna volcano. All the compartments and fluxes of organic matter distribution and turnover within four Castanea sativa Mill coppice stands of various ages and at various elevations were studied on the flanks of the Etna volcano Sicily . Aboveground biomass was to 22 and 24 Mg ha- in 7-year-old stands and 83 and 100 Mg ha 1 in 12- and 22-year-old coppices with good correlations between biomass and climatic conditions or stand age. Wood accounted for 95 of the biomass and leaves for 5 . Aboveground perennial biomass production amounted to to Mg ha 1 year1 and thus was also correlated with the age and the altitudinal location of the stands. Litterfall measured during 3 successive years varied between and Mg ha 1 year 1 and was directely related to the stand age. The litter accumulation on the soil surface was to Mg ha with only small differences between the four sites. Decomposition required more then 6 years. The comparison of the four coppices showed that all the processes concerning productivity as well as decomposition were related to climatic conditions and to the age of the coppice stands. Castanea sativa Mill organic matter biomass productivity litterfall litter decomposition Resume - Les differents compartiments et flux caractérisant la repartition de la matière organique .

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