СТРУКТУРА ГОРЮЧИХ МАТЕРИАЛОВ В СОСНЯКАХ РАЗНОГО ВОЗРАСТА КРАСНОЯРСКОЙ ЛЕСОСТЕПИ

RUSSIAN JOURNAL OF FOREST SCIENCE, 2017, No. 5, P. 431-436, DOI: 10.7868/S0024114817060055 THE STRUCTURE OF FOREST FUELS IN VARIOUSLY AGED PINE WOODLANDS OF FOREST-STEPPE DOMAIN IN KRASNOYARSK N. M. Kovaleva, R. S. Sobachkin, D. S. Sobachkin, A. E. Petrenko Forest Institute, Siberian Branch of the Russian Academy of Sciences Academgorodok 50 bldg. 28, Krasnoyarsk, 660036, Russia Е-mail: nk-75@mail.ru Received 22 March 2016 Storages and structure of forest fuels were documented in herbs-green mosses pine forests of different age in forest-steppe domain. Storages of forest fuels have grown up to 31.95 t ha -1 (mature pine forest) and 29.43 t ha -1 (middle-aged pine forest) because the last fire took place more than 50 years ago. Forest litter contributed 83.4% (24.5 t ha -1 ) in the middle-aged and 79.3% (25.3 t ha -1 ) in the mature stand. Fall in the mature stand 4.8 t ha -1 (15.1%) increased the one in the middle-aged stand 3.2 t ha -1 (11.0%). Ground cover contributed 2.8% in the middle-aged pine forest and 2.6%  in the mature pine forest to total storages of forest fuel. Wooded fall contributed 0.98 t ha -1 (3.1%) in the mature stand, and 0.84 t ha -1 (2.9%) in the middle-aged stand. We found that fire conducting fuels (forest litter, tree waste, mosses) contribute 30.8 t ha -1 in the mature forest, and 28.4 t ha -1 in the middle-aged forest. Long-term period without fire has increased the fire danger in the stands of different ages. Highly intensive and stable surface fire is probable in the mature and middle-aged pine stands. They can cause their serious injury or even death. Keywords: forest fuels, ground cover, forest litter, fall, wooded fall fuels, pine forests. REFERENCES Agroklimaticheskii spravochnik po Krasnoyarskomu krayu i Tuvinskoi avtonomnoi oblasti (Handbook of agroclimatic features in Krasnoyarsk krai and Tuva autonomous oblast), Leningrad: Gidrometeoizdat, 1961, 288 p. 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