THE DENSITY AND PRODUCTIVITY DYNAMICS OF THE MIDDLE AGE STAND OF PINE FOREST <i>VACCINIO MYRTILLI-PINETUM</i> OF THE MIDDLE TAIGA
The data on density and productivity dynamics of the middle age stand of pine forest <i>Vaccinio myrtilli—Pinetum</i> of the middle taiga are presented during its transition from middle-age to premature and mature stage since 1973 to 2011. The density of trees decreased. Dynamics of timber amount and organic mass was identical. The phytomass increased 1.5 times since 1973 to 1983 and slightly decreased to 2011. Mass of organic substance of mature pine forest was 139 t/ha. The phytomass density increased from 554 to 628 kg/m3.