Приживаемость культур сосны кедровой сибирской (Pinus sibirica Du Tour.) в условиях Ханты-Мансийского автономного округа — Югры

Abstract

The article discusses the reasons for the low survival capacity of Siberian stone pine (Pinus sibirica Du Tour.) crops in the conditions of the West Siberian mid-taiga plain forest region. The field stage of research was performed in the autumn 2020 and the summer 2022. The survival capacity of forest crops was determined on rectangular trial plots covering 1–2 % of the total area of the surveyed plots. The article provides data on the location and description of the studied areas of Siberian stone pine crops, as well as data on the number of surviving plants and the survival capacity of seedlings in these plots. In the course of the research, it was found that the survival capacity of Siberian stone pine crops in the four studied plots was 7,8 (60,3 %) in 2020, and this figure decreased to 3,6 (39,8 %) in 2022. Along with many other possible causes of excessive death of Siberian stone pine seedlings, the most likely reasons for the poor survival capacity are soaking seedlings and suppressing them with unwanted herbaceous and woody vegetation. In the three study areas, it is recommended to write off forest crops and replant seedlings. In one of the studied crop plots, it is necessary to perform silvicultural maintenance in order to remove unwanted hardwoods and supplement forest crops with enlarged seedlings or seedlings of Siberian stone pine. To increase the survival capacity of Siberian stone pine crops, it is recommended to abandon soil cultivation methods in which the upper fertile soil layer is mixed with the underlying levels, as well as to perform agrotechnical and silvicultural maintenance in a timely manner.