TAILIEUCHUNG - Báo cáo lâm nghiệp: " Pinus pumila growth at different altitudes in the Svyatoi Nos Peninsula (Russia)"

Tham khảo luận văn - đề án 'báo cáo lâm nghiệp: " pinus pumila growth at different altitudes in the svyatoi nos peninsula (russia)"', luận văn - báo cáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | JOURNAL OF FOREST SCIENCE 56 2010 3 101-111 Pinus pumila growth at different altitudes in the Svyatoi Nos Peninsula Russia R. Gebauer1 D. Volarík1 T. Funda2 I. Fundova2 a. Kohutka2 V. Klapetek2 M. Martinkova1 O. a. Anenkhonov3 a. Razuvaev4 -Department of Forest Botany Dendrology and Geobiocoenology Faculty of Forestry and Wood Technology Mendel University in Brno Brno Czech Republic Department of Dendrology and Forest Tree Breeding Faculty of Forestry and Wood Sciences Czech University of Life Sciences Prague Prague Czech Republic institute of General and Experimental Biology in Ulan-Ude Ulan-Ude Russia 4Zabaikalsky National Park Ust-Barguzin Russia ABSTRACT Detailed research is necessary to better understand ecological adaptations of Pinuspumila Pall. Regel as a species whose biological properties are vital for its survival. In the Svyatoi Nos Peninsula three sites differing in altitude were selected. At all sites the growth form of P pumila was determined. At the high and medium sites the following parameters were measured linear increment on terminal branches leaf mass per area and the content of nitrogen per unit leaf area. Anatomical studies were carried out on shoots and four needle-year classes. It was found that needles were longer and narrower at the medium site when compared to the high site. Leaf mass per area was higher and a substantial increase in older needles occurred at the high site. Nitrogen content per unit leaf area served as an indicator of assimilation capacity and was higher at the high site. We can conclude that P. pumila has xeromorphic needles higher assimilation capacity better protection ability against pathogens and slower growth rate of terminal branches at the high site. Important is also a significant increment of the growth rate of terminal branches at the high site in recent years. Therefore data obtained from sites at the upper forest limit are valuable in assessing the climate changes and are useful for the forest management .

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