Аuthors: S. V. ZALESOV, doctor of agricultural sciences, professor, vice rector,
E. M. SEKERIN, graduate student,
Ural State Forest Engineering University (37 Sibirskiy tr. Str., 620100, Ekaterinburg)
Abstract: In the course of research on the undergrowth of Siberian stone pine in the southern taiga subzone Middle Urals were studied and analyzed the last forest inventory materials-these years. Identified features of propagation of Siberian stone pine in various conditions. So regrowth cedar appears in mature and overmatures stands (over 75 %). In the young stands of pine regrowth were found. The largest area with undergrowth of Siberian cedar was observed in coniferous stands just under 70 %. A maximum density in middle-aged and maturing dark coniferous plantations and occurs 0.98 and 0.80 thousand units/ha. Mini- mum number of regrowth seen in middle-aged are deciduous and mature stands (0.21 and 0.22 thousand pcs/ha). The optimal value of completeness for the growth of undergrowth of Siberian stone pine is from 0.4 to 0.7. With a value of 0.5 is observed completeness of the maximum amount of regrowth and is 0.84 thousand pcs/ha. Number of undergrowth under the canopy of trees in the first place depends on the type of wood, the maximum amount of undergrowth in the study area is observed in the lichen group of forest types (1.32 thousand pcs/ha). Such an extension of undergrowth stone pine can be explained firstly the lack of competition of other tree species in the second feature of seed dispersal, this type of forest is rich topographical and confined to the upper part of the slope that is, in turn, has a bright benchmarks for birds and has a shallow depth of snow cover that is attractive to the main peddlers of stone pine seeds — birds.
Keywords: Siberian stone pine, undergrowth, southern taiga, age, obesity, type of wood, wood formation, the amount of regrowth, natural regeneration, the parent stand.
