Growth of geographic cultures of Siberian cedar for 50 years under the canopy with different logging density in the suburban area of Krasnoyarsk

• Main Authors: Rimma Matveeva, Olga Butorova, Eduard Kolosovsky
• Format: Article
• Language: English
• Published: Ukrainian National Forestry University 2019-03-01
• Series: Наукові праці Лісівничої академії наук України
• Subjects: forest cultures; geographical origin; density; variability; biometric indices; Siberia
• Online Access: http://fasu.nltu.edu.ua/index.php/nplanu/article/view/268

Information about the growth of Cedar Siberian culture under canopy of tree stands depending on the geographical origin are provided. Cedar Siberian, featuring a high nutritional and environmental qualities, needs to retain and artificial afforestation in suburban areas of major industrial centers. Taking into account high resilience of Cedar siberian in the groups and under the canopy, in the suburban area of Krasnoyarsk geographic culture were established under the canopy of tree stand on a plot Gornii-2" in the Karaulny territory of the SibSU Experimental Forestry. It were created in 1966 year by landing 4-year-old seedlings in the sites sizes 07h 0.7 m (9 seedlings in pad) between centers of sites 4 m. In each site among the leader trees it was determined height, trunk diameter at a height of 1.3 m, diameter koruna, growth of Central escape, number of lateral branches on the bottom of the live whorl, etc. The reliability differences determined by t-test. Correlation coefficients and presence and the closeness links between the studied variables were determined. The part of impact of geographical origin and the cramped canopy on the growth of the culture was define by the method of variance analysis. The paper summarizes the results of a study of the variability of six geographical origins Cedar siberian: Altay, Birjusinsky, Butyat, Kemerovsk, Tomsk, Chita, planted under a canopy of birch and Scots pine in cramped canopy tree stand from 0.1 to 1.0. It has been established that the 50-year-old culture reached a height of 5.4 m -10.4, diameter barrel- -16.5 2.0 cm. Culture growing in cramped canopy 0.1 -0.5, had height at 36.6%, trunk diameter-at 44.8% more. The level of variability- average and high. Increase Central escape in cultures of 49-50 years of age amounted to 26.6 cm -60.6. In cultures with large lighting (0.1 -0.5 canopy cover) exceeded this figure is 41.1%, than in trees growing in shaded conditions (tree canopy 0.6 -1.0) at elevated, high and very high levels of variation. The largest number of branches in the lower live whorl (4.8 and 4.1 PCs.) trees had Chita, smallest (3.2 and 2.3 PCs.) - trees Kemerovo origin. The level of variation indicator increased in Altai and Birjusinskom options; high in the rest with less cramped canopy. The level variability is increased and higher (26.5-41.9%) when cramped canopy 0.6-1.0. It is noted that the greater influence on biometrics indicators has cramped canopy tree crops (65.0%). The share of influence of geographical origin amounted to 13.8%. It is proposed to conduct thinning to reduce the influence of canopy forest stand. Further research is planned in cultures of Cedar Siberian under canopy after thinning conducting.