Dendroecological growth research for Picea Schrenkiana in Botanical garden of M.V. Lomonosov Moscow State University by tree-ring data analysis

Based on the material of the Schrenk’s spruce (Picea schrenkiana F. et. M.) from the MSU Botanical Garden, time series of radial growth and dated chronologies of this spruce species were obtained for the first time. A previously developed specific method of cross-dating of tree-ring chronologies has been tested, which is suitable for obtaining dendrochronological information in species growing at the extreme limits of introduction. Fallen annual rings were found in a number of trees in 2007, 2008, 2009, 2010. The main adverse effect on the growth of the Schrenk’s spruce took place in 2007, after which each tree had a different number of annual rings (depending on the strength of the damage). By the method of climagrams, it was found that the main adverse effect in 2007 was caused by increased temperatures in January, frosts in February and the subsequent drought at the beginning of the growing season.