Preserving complex pine forests in the taiga zone in conditions of science-based and sustainable forest management

Abstract

The article presents the research of the content and structure of the formed young growth at the sites of alternate strip felling (ASF) in 2013-2015 in different types of forest growing conditions (FGC) in Medvedskiy Bor (the Kirov region): А1 (lichen pine forests), А2 (cowberry pine forests), В2 (beadruby-cowberry pine forests), В3 (beadruby-bilberry pine forests), С2 (mixed-grass pine forests). Circular discount areas of the size of 10 m2 were made in accordance. Undergrowth complete enumeration was made at the areas, young growth taxation characteristics, as well as the age, biometric parameters and the state category of Pinus sylvestris L. were estimated. Undergrowth was distributed according to size categories – small, medium and large; according to the degree of viability – establishing (viable, healthy), doubtful (suppressed, injured), wilting (drying), dry (dead). Successful regeneration of P. sylvestris takes place at the expense of specimen of next generations. The number of large undergrowth almost 4 times exceeds the norm for artificial reforestation with bareroot tree seedlings (3500 sp./ha) at А1 felling places, 3 times – at А2 and В3, and 2 times – at В2 and С. As for containerized tree seedlings, with the norm of 2000 sp./ha, viable, establishing undergrowth 8 times exceeds the norm at felling places of А1 type, 6 times – at А2 and В3, 4 times – at В2 and С2. Grass-subshrub storey and moss-lichen storey regenerated at all the felling places. In order to preserve complex pine forests and to keep biodiversity in the region, special measures contributing to P. sylvestris natural regeneration and measures of forest care after ASF are offered.