Assessment of the state of balsamic poplar (Populus Balsamifera L.) in the green spaces of Bratsk

Abstract

The article is devoted to the study of the state of balsamic poplar (Populus balsamifera L.) in the conditions of industrial centers of Siberia on the example of the city of Bratsk. Bratsk is characterized by harsh natural and climatic conditions, high levels of pollution by gaseous and solid emissions, and is included in the Federal Clean Air Project. (Populus balsamifera L.) introduced poplar (native to North America) has adapted so well to the conditions of Eastern Siberia that it can be classified as an invasive species with a high probability, since vegetative reproduction has allowed it to become the dominant species of the city’s green spaces. Comprehensive studies of the condition of balsamic poplar in the urban environment have been carried out. A total of 2.586 trees were examined, of which 623 trees were modern, for which instrumental research methods were used. Based on the conducted studies, it was found that the life expectancy of poplars in a polluted urban environment, especially along highways, is no more than 20‑30 years. By the age of 30‑40, poplars are already in critical condition, shrink or even belong to the old deadwood (4‑5 points of vital condition). Poplar trees are vulnerable to sound rot and other diseases of wood and leaves. According to instrumental observation, more than 50% of all poplars in Bratsk are affected by various diseases and rot. Based on the studies conducted, it can be recommended to use balsamic poplar (Populus balsamifera L.) as a breed that should be replaced in a timely manner at the age of 40‑50 years, with others more durable and resistant to rot and diseases.