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National Repository of Grey Literature 1 records found  Search took 0.00 seconds. 
Analýza tvorby xylému ve dvou porostech odlišného věku u jedinců smrku ztepilého (Picea abies (L.) Karst)
 Rolincová, Petra
Analysis of xylem formation in the stands of different ages was realized in research area in Drahany Highlands. The main objective was to compare the growth dynamics between young and old trees during the growing season 2014. Samples were taken at weekly intervals by means of Trephor tool. For these samples were made the micro-incisions with using the method impregnation microcores paraffin and slicing on rotary microtome. The results were compared with studies with the same focus. Cambial activity of old trees was 20 days shorter than in case of young trees and the number of cambial cells of old trees was smaller than young trees. Trend of xylem cell development was the same for both age groups, but in old trees the beginning of differentiation was shifted by 11-14 days later. Production rate of cells was higher in young trees. Total number of cells of newly formed annual ring was in young trees 42 % higher.
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