THE BIOMETRICS PARAMETERS OF ASSIMILATING APPARATUS IN POST-FIRE PINE YOUNG STANDS
The scots pine rehabilitation processes on burnt areas in different forest growth conditions of Northern Kazakhstan was studied. In discussing our findings the quantitative characteristics of undergrowth varying from 8.9 to 104.9 thousand pcs./ha, this gives basis to characterize the regeneration of pine as “good”. The work has been done to analyze the influence of forest growth conditions and taxation indices, formed of pine young stand on burnt areas, on biometrics parameters of assimilation of scots pine on the Northern Kazakhstan. Reliable correlation between the weight of 100 pairs of needles and the density of undergrowth of scots pine height of more than 1.0 m is established: the decrease in the density of undergrowth increases the weight of 100 pairs of needles. The same sort of situation between the length of needles and density of pine undergrowth height of more than 1.0 m. However, in the latter case, the dependence can be described only as a tendency. The range of changing the density of the growth of 5 to 18.0 thousand pcs./ha is favorable for formation at this stage of development of assimilation apparatus pine undergrowth height of more than 1.0 m. Increasing the density of undergrowth pine of height of more than 1.0 m in 1.4-3.0 times reduces the value of biometric indicators assimilation apparatus, such as the mass of 100 pairs of needles and needle length in 1.2-1.8 times. The reproduction on the burned areas of the Northern Kazakhstan takes quite successfully in all forest growth conditions. Number of undergrowth of scots pine height of more than 1.0 m 8-16 years after fire varies from 4.8 to 24.8 thousand pcs./ha. Last indicate on non-expediency of artificial regeneration on area of not more than 22 ha, since on all forest growth conditions formed pine young stands. Dominance in the structure of young stand formed on the burned areas with moist forest conditions softwood trees give rise to necessitate of thinning to prevent of replacement of species.