Journal of Forest Science, 2003 (vol. 49), issue 11
The elasticity of growth in pure and mixed stands of Norway spruce (Picea abies [L.] Karst.) and common beech (Fagus sylvatica L.)
H. Pretzsch
J. For. Sci., 2003, 49(11):491-501 | DOI: 10.17221/4721-JFS 
This study indicates that the growth of mixed stands with Norway spruce (Picea abies [L.] Karst.) and common beech (Fagus sylvatica L.) is more stable across a range of stand densities than it is in pure forests of the same species. Typical density-growth-relationships are derived from 42 long-term experimental areas with 134 plots in total, the oldest of them under survey since 1870. From these results it is apparent that in pure stands maximum growth can be obtained only at medium stand density, whereas in mixed stands growth is almost unchanged over a range of low, medium and high stand density. The finding that mixed stands may...
Production potential and ecological stability of mixed forest stands in uplands - V. A mixed spruce/beech stand on a nutrient-rich site of the Křtiny Training Forest Enterprise
P. Kantor, V. Hurt
J. For. Sci., 2003, 49(11):502-514 | DOI: 10.17221/4793-JFS
The study is already the 5th account on the production potential and stability of mixed forest stands in uplands. A spruce/beech stand established in the mid-30s of the 20thcentury is assessed. The stand is situated at an altitude of 470 m and since 1960, it is left to its spontaneous development. At that time, the stand was characterized as a silviculturally neglected dense spruce young growth to a small pole-stage stand with an admixture of beech (spruce 71%, beech 13%). In the course of 41 years, spruce proportion in the stand without intentional thinning measures decreased from 71 to 56% and, vice versa, beech proportion increased...
Natural 15N abundance in two nitrogen saturated forest ecosystems at Solling, Germany
S.P. Sah, R. Brumme
J. For. Sci., 2003, 49(11):515-522 | DOI: 10.17221/4794-JFS
This research deals with a comparative study of two different N-saturated forests: 1. beech forest and 2. spruce forest at the same locality of \solling, Central Germany. The present results show that 15N natural occurrence in the rainfall (both above and below canopy) at Solling site is similar (δ15N = -15‰ to +19‰) to other sites of the world (such as NITREX sites, USA etc.). Furthermore, 15N values in the soil water ranged from -4.32 (± 2.09) to +5‰ (± 1.47), which also corresponds to NITREX sites and other sites of Europe and USA. In both forests, δ15N enrichment...
The effect of spruce stand thinning on biological activity in soil
P. Formánek, V. Vránová
J. For. Sci., 2003, 49(11):523-530 | DOI: 10.17221/4795-JFS
The effect of thinning of young spruce stands by 500 trees/ha on biological activity in the soil profile was studied in the mountainous area of the Moravian-Silesian Beskids. The biological activity of soil was determined under optimal laboratory conditions by tests of soil respiration, catalase activity and intensity of cellulose decomposition. No statistically significant differences were found between the individual biological tests when the two experimental stands were compared (P-level 0.05). All biological activities within each stand were correlated, and significant correlations were found between biological activities in the soil and...
Effect of desiccation on the root system of Norway spruce (Picea abies [L.] Karst.) seedlings and a possibility of using hydrogel STOCKOSORB® for its protection
M. Sarvaš
J. For. Sci., 2003, 49(11):531-536 | DOI: 10.17221/4796-JFS
The aims of this study were: 1. to determine the effect of dexiccation treatment on the physiological quality of Norway spruce (Picea abies [L.] Karst.) seedlings by measurements of electrolyte leakage from the root system; b) to test the use of hydrogl STOCKOSORB® for protection of the root system of spruce seedlings during their transplanting. The results showed that desiccation treatment significantly affected the rate of electrolyte leakage (34% leakage for control seedlings and 53% in contrast with seedlings after 5 hours of desiccation). Likewise, significant differences were found in height and root collar increments...