Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Growth and health state of silver fir (Abies alba Mill.) in the ridge area of the Jizerské hory Mts. | JOURNAL OF FOREST SCIENCE 54 2008 11 509-518 Growth and health state of silver fir Abies alba Mill. in the ridge area of the Jizerske hory Mts. V. Balcar D. Kacálek Forestry and Game Management Research Institute Strnady Opocno Research Station Opocno Czech Republic ABSTRACT The silver fir was planted under mountain conditions in order to reveal its response to the addition of finely ground rocks limestone and amphibolite mixed with soil into the planting holes. The results document that the increments of the plantations fertilised with amphibolite were higher by 25 on average than those of the control plantations while the increments of the plantations treated with dolomitic limestone were lower by 13 . Generally as concerns both the plantations with the application of ground rocks and the control ones the development of the fir plantations in 1994-2007 is considered successful. As the damage by climatic stresses has gradually diminished the number of dead trees has been decreasing and the height increments have been increasing in the last years therefore a positive development is to be expected also in future. Keywords silver fir Abies alba Mill. artificial regeneration chemical amelioration The silver fir Abies alba Mill. belongs to the most important tree species in the forests of the Czech Republic its original representation in the area of the Jizerske hory Mts. having been ca 19 Vacek et al. 2003 . Its natural occurrence in the Jizerske hory Mts. ranges from the beech with oak Forest Altitudinal Zone FAZ to the spruce FAZ . up to the altitude of about 1 000 m above sea level while the optimum of occurrence lies in the beech with fir FAZ at an altitude from 480 to 590 m . Besides an economic effect the fir also fulfils ecological functions and therefore it belongs to the ameliorative and stabilising tree species OPRL 1999 . For its importance the silver fir was included in a planting experiment situated on the ridge because it is considered as a .
