Contribution to growth and increment analysis on the Italian CONECOFOR Level II Network

摘要: The paper deals with the "Estimation of growth and yield" included in National Programme on Intensive Monitoring Forest Ecosystems CONECOFOR Aims are: i) to outline composition design Level II PMPs network, also examining structural characteristics forest stands; ii) describe contents mensurational surveys carried out winter 1996/97 1999/00; iii) analyse rates progress at each PMP using selected descriptors. Stand origin (11 high forests 13 stored coppices transitory crops) number types tested are focused as main discriminants network. This composition, together irregular forestry practice, results a consequences (prevailing age classes, tree densities related stand structures, patterns) which cause in-and-between variability all parameters. For purposes this analysis, network plots was divided into three sets: broadleaved (i.e. beech stands), 6 PMPs; coniferous Norway spruce 5 coppice deciduous evergreen oaks, hardbeam PMPs. measurement basic variables (dbh height) used populations PMP; calculation basal area, mean top dbh, height, provided reference dataset inventory. assessment social class according Kraft gave information vertical structure made it possible layers. Data comparison increments interval 1997-2000. occurrence natural mortality ingrowth assessed take account their combined effect population dynamics. No trend found, due limited data availability, but have detailed overview situation