[DISCONTINUED] Forest increment and fellings

The product has been discontinued since: 20 Jul 2015. The indicator is defined as the ratio of annual fellings to net annual increment. For 2005, removals are used as a proxy for fellings. Fellings refer to the volume of all trees, living or dead, which are felled during a given period, whether or not removed from the forest or other felling sites. Removals (the term is synonymous with roundwood production) are equal to fellings less unrecovered fellings. Net annual increment is defined as gross increment less natural losses over a given period. Gross increment is the average volume of increment of all trees (all diameters, down to a stated minimum diameter) over a given period. It is reported in cubic metres overbark (i.e. including bark). Also included is the recruitment of small trees when they reach the minimum diameter.该产品自2015年7月20日起停产。 本指标定义为年度采伐量与年度净生长量的比值。2005年采用伐除量作为采伐量的替代指标。采伐量指特定时段内被采伐的所有活立木与枯立木的蓄积量，无论这些林木是否从林地或其他采伐场地被运出。伐除量（该术语与原材产量同义）等于采伐量减去未回收采伐量。年度净生长量定义为特定时段内总生长量减去自然损耗量。总生长量指特定时段内所有林木（涵盖所有径级，直至规定的最小径级）的平均生长蓄积量，以带皮立方米（即包含树皮）为单位进行统计。此外，当幼树生长至规定最小直径阈值时，其蓄积量亦计入总生长量。