Biological reserves of bracken fern (Pteridium aquilinum (L.) Kuhn) in the coniferous forests of Altai Krai

The article presents information on the biological resources of bracken fern (Pteridium aquilinum (L.) Kuhn) in coniferous forests Altai Krai. Bracken is one most widespread ferns It often dominates grass cover both deciduous and forests. author gives a morphological description plant, characterizes features growth development, considers influence environmental factors (temperature, humidity, lighting, anthropogenic activity) distribution abundance this species. provides data productivity different natural zones Russia. regularities changes were revealed depending habitat conditions. In Krai, commercial harvesting carried out various types Long-term exploitation same lands leads to decrease disruption populations’ structure. To study current state populations identify stocks bracken, we examined (fir pine forests) mass - Priobsky Bor area Salair ridge zone. area, 68 key sites groups forest established by random sampling. At each site, geobotanical descriptions community out, number fronds, density standing, projective average weight frond determined. obtained are extrapolated entire area. Studies show an extremely uneven individual regions. During research period, biological, economic operational determined recommendations given amount annual harvest