Vliv solární radiance na morfologickou a anatomickou stavbu jehlic smrku ztepilého

There were chosen twelve localities with even-aged Norway spruce trees from different altitudes and northern and southern exposure at the Jeseníky Mountains. One-year old sun-exposed shoots were sampled from every locality. Needles were taken from shoots and then used for making the cross-sections. Additional needles were taken for needle area, needle length and dry matter analysis. Anatomical analysis was done on the microscopic pictures. The predictive maps for some morphological and anatomical parameters were created by the use of elevations and solar radiation data in ArcGIS. It was found that with increasing altitude the morphological and anatomical parameters of needles were not in linear progress. The best correlations with solar radiation was found for needle length. In this case, the change of needle length was explained by 82 % by the change of solar radiation. Although the growth of needles and thus the tree is determined by complex influence of external and internal factors, these results indicate significant effect of solar radiation on the Norway spruce growth at the Jeseníky Mountains