Recognition of Stages of Montane Norway Spruce Response to Multiple Stress Impact Using Crown and Branch Structure Transformation Analysis : 2nd Slovenian Symposium on Plant Physiology with international Participation, Gozd Martuljek. Slovenia, September, 30 to Oktober 2nd, 1998

1999

S. 149-153

1 Abb., 4 Lit.

Unselbständiges Werk

200059361

Crown structure transformation (formation of secondary shoots of different orders in successive series on damaged and/or defoliated branches) is a very sensitive indicator of life history analysis of the tree. Response of six probably autochthonous Norway spruce stands in the Krkonose Mts. to synergistic action of natural and anthropogenic stress impacts has been investigated using selected indicators since 1992. Tree crowns on the plot were visually investigated and classified into several categories of crown structure transformation. One or more trees from most frequent categories were selected for investigation of the branch structure transformation. Distinct secondary shoot formation, which compensates a defoliation of primary shoots, indicates overcharging of "stress exceedance starting level". "Significant harmful effect time" can be detected by estimation of the time of termination of annual wood production of primary shoots. Trends of annual wood production time series of the branch base and of the sum of all lateral shoots of branch investigated inform us about possible subsequent development of the branch.