Russian Federation
The results of 20-year trial of 10 aspen ecotypes (P. tremula L.) from the following regions: Educational-experimental forestry enterprise of Voronezh Forestry Engineering Institute (currently: Voronezh State University of Forestry and Technologies), botanical garden of Voronezh State University, Saval’ forestry enterprise of Voronezh region, Kostroma forest research station, Oboyan’ forestry enterprise of Kursk region, Valuiky forestry enterprise and Gubkin forest district of Belgorod region, and American aspen (P. tremuloidesMichx.) from Latvia are presented. After 20 years studies, the best aspens on growth energy and productivity from botanical garden of Voronezh State University (inv. No. 16 and 17), Oboyan’ forestry (inv. No. 15) and Valuiky forestry (inv. No. 14) were identified. These aspen ecotypes were included in the hybridization process to obtain new highly tolerant hybrids.
ecotype trial, Populustremula L.,growth analysis, growth energy, productivity
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