INTERNATIONAL SCIENTIFIC CONFERENCE FORESTRY: BRIDGE TO THE FUTURE 90 Years Higher Forestry Education in Bulgaria 6–9 May 2015, Park Hotel Moskva, Sofi a, Bulgaria Book of Abstracts Sofi a, 2015 Editors: Milko Milev, Petar Zhelev, Krasimira Petkova, and Marius Dimitrov Language editors: Petar Zhelev, Nikolina Tzvetkova, Svetoslav Anev, Momchil Panayotov, Youlin Tepeliev, Genoveva Tzolova, Stefan Mirchev, and Stoyan Stoyanov Technical editor: Toma Tonchev Pre-pres: Magdelina Bozhankova Cover design: Emil Galev Publishing House of the University of Forestry Printed by Intel Entrans The International Scientifi c Conference “Forestry: Bridge to the Future” is fi nan- cially supported by the Ministry of Agriculture and Food of Bulgaria, Ministry of Education and Science of Bulgaria and other sponsors, presented on pages 8–10. ISBN 978-954-332-134-6 University of Forestry Sofi a, Bulgaria WELCOME ADDRESS Dear Colleagues and Friends, Ladies and Gentlemen, It is a great pleasure and honour for me to welcome you to the International Scientifi c Conference “For- estry: Bridge to the Future”, dedicated to the 90th an- niversary of higher forestry education in Bulgaria. We are glad to host this scientifi c event, which pro- vokes substantial interest and put together more than 100 scientists from twen- ty-three countries from all over the World. The interest to the Conference un- derlines the signifi cance of forests and forestry and refl ects the attention of the international scientifi c community. The Conference will be a good occasion for participating scientists to present the results of their research work and to share their opinions and experience with the colleagues from many different countries, as well as to bring together academic researchers and business practitioners from the forestry sector. Main focus of the Conference is the global climate change and its effect on for- ests and forestry in general. This is related also to the other ecological problems and challenges, such as environmental pollution, soil degradation, desertifi cation and deforestation. All these topics concern forests and forestry. The forests react sensitively to a changing climate. They have the potential to absorb the carbon emissions into their biomass, soils and products, and to store them. Therefore, it is of particular importance to study Forestry and share information and good practices among the scientists and professionals from different countries. The international and local organizing committees of the Conference have pre- pared a diverse scientifi c programme including invited speakers, and voluntary report and poster presentations. The agenda is well-balanced, combining various scientifi c topics and social events. Many of the participants are university professors and lecturers, and we have more than 30 students and PhD students from 7 countries. This is a prerequisite for one more important gain – the new scientifi c achievements will reach the 4 teaching programmes. Therefore, I believe that our Conference creates a strong bridge to the better future of our forests and nature, for our present and future societies. I hope also that you will enjoy the social programme containing number of dif- ferent events to satisfy both delegates and their companions. I believe you will learn new things about Bulgaria and will bring home excellent impressions of our country. Finally, on behalf of the Organizing Committee, I would like to express my best wishes to you for a successful work and fruitful stay in Bulgaria. With cordial greetings, Chair of the Organizing Committee Professor Dr. Veselin Brezin Rector of the University of Forestry 5 ORGANIZING COMMITTEE Chairman: Prof. Dr. Veselin Brezin – Rector Vice Chairman: Assoc. prof. Dr. Milko Milev – Dean Secretary: Assoc. prof. Dr. Peter Zhelev – Vice-rector Members: Prof. DSc Dinko DINEV– Oak Forest Experimental Station, Burgas, Bulgaria Prof. Dr. Ivan ILIEV – University of Forestry, Sofi a, Bulgaria Prof. DSc Atanas KOVACHEV– University of Forestry, Sofi a, Bulgaria Prof. Dr. Ivan PALIGOROV – University of Forestry, Sofi a, Bulgaria Prof. Dr. Rossitsa PETROVA – University of Forestry, Sofi a, Bulgaria Prof. Dr. Youlin TEPELIEV – University of Forestry, Sofi a, Bulgaria Prof. Dr. Rumen TOMOV – University of Forestry, Sofi a, Bulgaria Prof. DSc Hristo TSAKOV– Forest Research Institute, BAS, Sofi a, Bulgaria Prof. Dr. Stefan YURUKOV – University of Forestry, Sofi a, Bulgaria Dr. Neno ALEXANDROV – University of Forestry, Sofi a, Bulgaria Dr. Plamen ALEXANDROV – University of Forestry, Sofi a, Bulgaria Dr. Svetoslav ANEV – University of Forestry, Sofi a, Bulgaria Dr. Martin BORISOV – University of Forestry, Sofi a, Bulgaria Dr. Marius DIMITROV – University of Forestry, Sofi a, Bulgaria Dr. Emil GALEV – University of Forestry, Sofi a, Bulgaria Dr. Dimitar GEORGIEV – University of Forestry, Sofi a, Bulgaria Dr. Nasko ILIEV – University of Forestry, Sofi a, Bulgaria Dr. Georgi KOSTOV – University of Forestry, Sofi a, Bulgaria Dr. Kiril LYUBENOV – University of Forestry, Sofi a, Bulgaria Dr. Valentina MARINOVA – Ministry of Agriculture and Food, Sofi a, Bulgaria Dr. Hristo MIHAILOV – University of Forestry, Sofi a, Bulgaria Dr. Momchil PANAYOTOV – University of Forestry, Sofi a, Bulgaria Dr. Krasimira PETKOVA – University of Forestry, Sofi a, Bulgaria Dr. Elena RAFAILOVA – University of Forestry, Sofi a, Bulgaria Dr. Metodi SOTIROV – University of Freiburg, Germany Dr. Toma TONCHEV – University of Forestry, Sofi a, Bulgaria Dr. Lyubcho TRICHKOV – Executive Forest Agency, Sofi a, Bulgaria Dr. Neno TRICHKOV – University of Forestry, Sofi a, Bulgaria Dr. Ivaylo VELICHKOV – Forest Research Institute, BAS, Sofi a, Bulgaria Dr. Tzvetan YORDANOV – University of Forestry, Sofi a, Bulgaria Dr. Chavdar ZHELEV – University of Forestry, Sofi a, Bulgaria Assist. Prof. Ing. Evgeni TSAVKOV – University of Forestry, Sofi a, Bulgaria Ing. Toni KRASTEV – Executive Forest Agency, Ministry of Agriculture and Food, Sofi a, Bulgaria Conference website: http://conf2015.forestry-ideas.info/ 6 INTERNATIONAL SCIENTIFIC COMMITTEE Chair: Milko MILEV – University of Forestry, Sofi a, Bulgaria Vice-chair: Peter ZHELEV – University of Forestry, Sofi a, Bulgaria Secretary: Krasimira PETKOVA – University of Forestry, Sofi a, Bulgaria Members: Ioan Vasile ABRUDAN – Transilvania University of Brasov, Romania Sezgin AYAN – Kastamonu Universitesi, Turkey Dilyanka BEZLOVA – University of Forestry, Sofi a, Bulgaria Milić ČUROVIĆ – University of Montenegro, Montenegro Alexander DELKOV – Forest Research Institute – BAS, Sofi a, Bulgaria Ulises DIÉGUEZ-ARANDA – University of Santiago de Compostela, Lugo, Spain Igor DROBYSHEV – Swedish Agricultural University (SLU), Alnarp, Sweden and University of Quebec at Abitibi-Temiscamingue (UQAT), Canada Emil GALEV – University of Forestry, Sofi a, Bulgaria Dimitar GEORGIEV – University of Forestry, Sofi a, Bulgaria Ivan ILIEV – University of Forestry, Sofi a, Bulgaria Dragan KARADŽIĆ – Faculty of Forestry, University of Belgrade, Serbia Peter KITIN – Center for Wood Anatomy Research, USDA Forest Service, Madison, Wisconsin, USA Georgi KOSTOV – University of Forestry, Sofi a, Bulgaria Marcus LINDNER – European Forest Institute (EFI), Joensuu, Finland Milan MATARUGA – Faculty of Forestry, University of Banja Luka, Bosnia and Herzegovina Hristo MIHAILOV – University of Forestry, Sofi a, Bulgaria Gert-Jan NABUURS – Wageningen University and Research, Netherlands Kevin O’HARA – University of California, Berkeley, California, USA Marc PALAHÍ – European Forest Institute (EFI), Joensuu, Finland Ivan PALIGOROV – University of Forestry, Sofi a, Bulgaria Rossitsa PETROVA – University of Forestry, Sofi a, Bulgaria Jean-Luc PEYRON – Directeur d’ECOFOR, Chairman of COST FP0703 “ECHOES”, EFI, France Andrej PILIPOVIĆ – Institute of Lowland Forestry and Environment, University of Novi Sad, Serbia Ivan RAEV – Forest Research Institute, BAS, Sofi a, Bulgaria Valentin SHALAEV – Moscow State Forest University, Russia Velibor SPALEVIC – Institute of Forestry, Montenegro Kiril SOTIROVSKI – Faculty of Forestry, University of Skopje, Macedonia Heinrich SPIECKER – University of Freiburg, Germany Youlin TEPELIEV – University of Forestry, Sofi a, Bulgaria Lyubcho TRICHKOV – Executive Forest Agency, Ministry of Agriculture and Food, Sofi a, Bulgaria Neno TRICHKOV – University of Forestry, Sofi a, Bulgaria Nikolina TZVETKOVA – University of Forestry, Sofi a, Bulgaria Nikolay ZAFIROV – University of Forestry, Sofi a, Bulgaria Yaoqi ZHANG – Auburn University, Alabama, USA 7 ORGANISING AND SUPPORTING INSTITUTIONS University of Forestry, Sofi a, Bulgaria Faculty of Forestry, Sofi a, Bulgaria Ministry of Agriculture Ministry of Education Ministry of Environment and Food of Bulgaria and Science of Bulgaria and Water of Bulgaria International Union European Forest Institute Union of European of Forest Research Foresters Organizations Executive Forest Agency Union of Scientists Forest research Institute of Bulgaria in Bulgaria – BAS HONORARY PRESIDENT of the Conference Desislava Taneva, Minister of Agriculture and Food of Bulgaria The Conference will be held in parallel with the 7th annual meeting of the Deans and Directors of European Forestry Faculties and Schools (ConDDEFFS). HONORARY PRESIDENT of the 7th annual meeting of the ConDDEFFS Prof. Todor Tanev, Minister of Education and Science of Bulgaria 8 Acknowledgments to our sponsors LIST OF SPONSORS OF THE EVENTS MARKING THE 90TH ANNIVERSARY OF HIGHER FORESTRY EDUCATION IN BULGARIA Ministry of Agriculture Ministry of Education Ministry of Environment